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Author Topic: Making SEGA Genesis cartridges  (Read 37826 times)

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pbj

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Making SEGA Genesis cartridges
« on: March 13, 2022, 07:40:46 pm »
We all knew where this was going.  Starts with a Genesis II and MK2 from ginger brother Malenko and soon you’re buying bulk lots of sports games for the shells and PCBs.

It was time to dust off my rigged desoldering iron.  Some time in the fireplace got the clog cleared.

The squeeze bulb was removed, hosing was zip tied to it, it’s hooked to a shop vac I pulled from a dumpster.  The shop vac is controlled with a foot switch (continuous air keeps the tip too cold).  Every 3 dozen pins or so, you switch the hose to the exhaust port and blow everything out.  Then to really freak you out, let me inform you I don’t have any flux laying around so I used rendered hog lard.   :lol

Where it all went down.




Can’t argue with the results.



I did so many of them (12) that I started timing myself.  I could open the shell and pop the rom in less than 5 minutes by the end of it.




Stay tuned….








Zebidee

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Re: Making SEGA Genesis cartridges
« Reply #1 on: March 13, 2022, 11:55:01 pm »
Nice one PBJ. I like your vac setup for the desoldering, very creative. As you know, these jobs get easier in batches, once you get your technique and rhythm going.

Check out my completed projects!


bobbyb13

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Re: Making SEGA Genesis cartridges
« Reply #2 on: March 14, 2022, 12:37:24 am »
This setup is awesome.
Never would've imagined swine lube could be useful that way.
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #3 on: March 14, 2022, 06:01:52 pm »
This setup is awesome.
Never would've imagined swine lube could be useful that way.

Yeah, its great you can find a common thread between your passions, James. You are checking off a lot of trademark PBJ with meat byproduct soldering flux.  :cheers:

javeryh

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Re: Making SEGA Genesis cartridges
« Reply #4 on: March 15, 2022, 12:57:10 pm »
What is even going on here?  Are you swapping out PCBs from the crappy sports games or something?

Mike A

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Re: Making SEGA Genesis cartridges
« Reply #5 on: March 15, 2022, 01:01:38 pm »
What is even going on here?  Are you swapping out PCBs from the crappy sports games or something?

Some questions are better left unasked.

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Re: Making SEGA Genesis cartridges
« Reply #6 on: March 16, 2022, 10:03:42 am »
What is even going on here?  Are you swapping out PCBs from the crappy sports games or something?

Making the carts flashable. The universal ones PCBs don't fit in EA carts and its weird to see Skitchin running on a regular sized cart.  Plus I think its cheaper to do what he's doing instead of buying the Chinese bootlegs carts.
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Re: Making SEGA Genesis cartridges
« Reply #7 on: March 16, 2022, 11:04:26 am »
What is even going on here?  Are you swapping out PCBs from the crappy sports games or something?

Making the carts flashable. The universal ones PCBs don't fit in EA carts and its weird to see Skitchin running on a regular sized cart.  Plus I think its cheaper to do what he's doing instead of buying the Chinese bootlegs carts.

So you can flash whatever game you want, print out a sticker and it will be as if you have that game? 

That's super cool.  Is it hard to do?

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Re: Making SEGA Genesis cartridges
« Reply #8 on: March 16, 2022, 03:10:33 pm »
Took me until here to figure out wtf has been going on in this thread.
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #9 on: March 16, 2022, 04:40:32 pm »
Doesn't anyone read thread titles anymore?   ::)

Anyway, yes, in theory Genesis cartridges are easy to convert.  The only game with special chips on the board was Virtua Racing, which I already own.  Otherwise it was just a ROM.  Some of them got fancier with flash save game storage, high/low rom splitting across two cheaper chips, and others used battery backup but at the end of the day any game will run off a single 4MB EPROM.

In terms of cost, all in, I paid $0.87 each for these games.  The EPROMs are about $1 each in bulk.  I've got 20 coming on a slow boat from China.

EPROM burner with the proper adapter was $110.  I got the Willem GQ 4X4 because it's actively supported and seems to just work on the youtube videos I've watched.

EPROM eraser was $30.  Didn't think that was the device to mess around with rigging.

Desoldering iron I already had as seen previously.

Other options:

Everdrive.  $30 for a clone or $180 for the good one.  Already have one.  I want to touch cartridges.

Chinese flash carts.  Already have a few.  They need a special flasher, which I also already have.   They've about $3.50 for a loose PCB, $6 for one in a case, and $10 for one in a case with battery saving ability.  The battery saving ones only support 2 MB games, so Phantasy Star 4 and a few others are out.  The edges of the connector on these isn't beveled and I guess the chips run at the "wrong" voltage or whatever but they're fine.

Cheap bootlegs from Thailand.  $5.  Play fine.  Not beveled.  Look cheap.




Zebidee

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Re: Making SEGA Genesis cartridges
« Reply #10 on: March 17, 2022, 09:51:26 pm »
Cheap bootlegs from Thailand.  $5.  Play fine.  Not beveled.  Look cheap.

Same Same. But Different.

Welcome to shopping in Thailand.
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pbj

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Re: Making SEGA Genesis cartridges
« Reply #11 on: March 18, 2022, 01:21:16 pm »
Got my programmer in the mail.  Still waiting for the UV eraser and blank chips.

But, hey, I've got all these ROM chips laying around, might as well test the setup out and see if it reads chips correctly.

Mark this moment.  This is the first time in BYOAC history that this has ever happened.  Weaker men may feel compelled to insist differently, but your frankencab monstrosities with 30,000 games on them say otherwise.

But, I get ahead of myself.

Here's a Genesis ROM chip plugged into the adapter and programmer.



And here it is.  The first archival backup ROM obtained from a chip I legally own.



And here's a victory lap.



 :cheers:

javeryh

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Re: Making SEGA Genesis cartridges
« Reply #12 on: March 18, 2022, 01:23:21 pm »
Awesome.

bobbyb13

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Re: Making SEGA Genesis cartridges
« Reply #13 on: March 18, 2022, 01:35:29 pm »
Love it.

I read that Interpol still wants to see an original sales receipt though.
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

Vigo

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Re: Making SEGA Genesis cartridges
« Reply #14 on: March 18, 2022, 03:00:39 pm »
 :cheers: That is beautiful!

Gonna do any homebrew? A few games looked really good and have the roms out there for free like tanglewood.


pbj

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Re: Making SEGA Genesis cartridges
« Reply #15 on: March 18, 2022, 03:13:56 pm »
Some additional unexpected progress today.  My EPROM eraser and empty ZIF sockets arrived.

Here's what we're starting with, original ROM has already been removed.




Capacitors moved to the back of the cartridge and 6 pins carefully removed from the ZIF socket.  You can remove those two screws and pry it open and then remove the pins.  Or clip them I guess.



Soldered in place.  Went ahead and added a new battery (noticed it's flipped upside down because of the leg lengths)



And here we are successfully testing the old ROM again.



This cartridge will allow me to test burned chips without having to solder 42 pins.


Gonna do any homebrew? A few games looked really good and have the roms out there for free like tanglewood.

Yep!  Cave Story for sure and a few others.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #16 on: March 18, 2022, 04:16:40 pm »
Nice! I love this project. I gave my genesis away recently, but found one sitting in the bottom of a big box of Billy Big mouth Basses I bought in a local auction. I might have to clean it out and get it working.

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Re: Making SEGA Genesis cartridges
« Reply #17 on: March 18, 2022, 04:31:59 pm »
I gave my genesis away recently, but found one sitting in the bottom of a big box of Billy Big mouth Basses I bought in a local auction.

Now that is the most BYOAC sentence I’ve read in a long time.
TTC


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Re: Making SEGA Genesis cartridges
« Reply #18 on: March 18, 2022, 11:11:55 pm »
Very cool... I'm out of my element, but will you be able to put Sega Channel exclusive games on carts?
%Bartop

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Re: Making SEGA Genesis cartridges
« Reply #19 on: March 22, 2022, 11:38:55 am »
Stuff like Alien Soldier and Wiley Wars - Yes.  They're just the regular ROMs, but weren't released in the US in cart form.

Stuff like Garfield with the extra levels - No.  Lost to time.

If there's some good one I'm overlooking, I'd love to hear about it.  Sonic Eraser maybe..?

Phantasy Star 4 has turned out to be a particularly vexing problem.  It's a 3MB ROM split across two 2MB chips.  There's only a handful of games with that configuration, most of them sell for decent money, and most of them are good games you really wouldn't want to convert.  And only a few of those have save support.  Thankfully most of those are sports games nobody wants now.  Out of my ~90 cartridges, I own exactly one that is compatible.  The competition is a $10 shipped multicart from China with Phantasy 2, 3, and 4 already on it.  I'm not crazy about soldering 84 pins without checking the ROMs first, so that means making another donor cart.  Which means buying more junk games.   :lol

Pic for reference:




« Last Edit: March 22, 2022, 11:49:30 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #20 on: March 22, 2022, 07:06:18 pm »
sweet.

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Re: Making SEGA Genesis cartridges
« Reply #21 on: March 22, 2022, 09:11:26 pm »
I don't even play console games and i love this project.

Teach me more!
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #22 on: March 29, 2022, 05:31:54 pm »
I shouldn't probably comment on how many hours this took me to figure out, but here we are.

Basically, to my understanding, SEGA used these ROMs:

M27C400 - 512KB
M27C800 - 1 megabyte
M27C160 - 2 megabytes
M27C322 - 4 megabytes

M27C400 is only 40 pins, so it is shifted one slot over on the PCB.  That means pin 1 on the chip is plugged into pin 2 on the PCB.  It does not have A18 or A19.

M27C800, M27C160, and M27C322 are 42 pins.   

M27C800 does not have A19.  The pin is physically there and I think it's tied into 5V.  You have to cut this 5V connection and connect the pin to B8 if you want to use a bigger chip.

M27C160 has A19 and it's connected to B8 on the cartridge connector instead of the 5V line.  I think this is the most common PCB/ROM arrangement.

M27C322 has A20, it's on pin 32.  This needs to be tied into B9 on the cartridge connector.  If the board didn't originally have this ROM on it, this pin is connected to 5V and this needs to be cut.


So, unlike other consoles, Genesis ROMs don't care which chip they're burned to.  You just have to alter the PCB so that the console knows how to address the chip.

I have been very frustrated with the documentation I've found on line about all this.  Blurry photos and fuzzy memories.  So, I hope this is a little more clear.  At least it'll be good notes to myself some day, maybe.



If you make the connections as shown in the photo, you can make any board work with any ROM.  The only exception are the games bigger than 2MB with saves.  It has to be split across 2 2MB chips without significant reworking of the PCB and additional components.  2MB of the ROM on the chip on the bottom of the board, the rest on the top.  There's only a handful of these games and World Series Baseball 95 and 96 make excellent sacrificial lambs to become Beyond Oasis and Phantasy Star 4.  I'll post more information about these after I make one.


 :cheers:

Mike A

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Re: Making SEGA Genesis cartridges
« Reply #23 on: March 29, 2022, 06:21:37 pm »
Have you considered a Pi?

Malenko

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Re: Making SEGA Genesis cartridges
« Reply #24 on: March 30, 2022, 01:15:05 pm »
Have you considered a Pi?
BUY A KADE!

Also great work. I am assuming the rom didnt need split on my beyond oasis cart cause the Chinese bootleggers just designed a PCB that allows for a 4MB ROM and battery?  I didnt crack it open to look but now I think I will.

ok, heres the guts of the Beyond Oasis bootleg:

This is still one of the best genny games
« Last Edit: March 30, 2022, 07:55:46 pm by Malenko »
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Re: Making SEGA Genesis cartridges
« Reply #25 on: April 02, 2022, 10:30:38 pm »
I considered a pi and a Kade and chose otherwise.  We are into retro gaming because it is expensive and inconvenient.

Anyway, here we go…

Here’s front and back of my new 4MB tester cart.  I used canola oil this time to keep it kosher/halal.  This is not haram.






You can see an EA cart in the foreground but that’s a rant for another day.

My package from China arrived today, the 4MB chips are in beautiful shape.






Cook cook cook cook…




And holy freaking sonic, it works!







pbj

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Re: Making SEGA Genesis cartridges
« Reply #26 on: April 02, 2022, 11:12:32 pm »
ROM don’t care what chip it’s on…




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Re: Making SEGA Genesis cartridges
« Reply #27 on: April 02, 2022, 11:21:46 pm »
Very nice Jim. Very nice work indeed :)
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Re: Making SEGA Genesis cartridges
« Reply #28 on: April 02, 2022, 11:29:45 pm »
Sweet.

Although canola oil is kind of a let down after the swine lube treatment.
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Re: Making SEGA Genesis cartridges
« Reply #29 on: April 02, 2022, 11:43:00 pm »
At least it is vegetarian/vegan


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Re: Making SEGA Genesis cartridges
« Reply #30 on: April 03, 2022, 02:50:53 pm »
So, the mega drive cartridge database is not entirely accurate.  Madden 93 has save functionality.  This had to be disabled by cutting a bunch of traces and then jumping connections back in to the rom chip.

Nothing like buzzing out 42 pins on two pcbs and comparing them….


Jumpers added, cuts made.



And here’s the front of this monstrosity.  I’m going to switch over to 2MB EPROMs soon, which will eliminate one of these jumper wires.




And here’s my reasonably convincing full package.   ;D





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Re: Making SEGA Genesis cartridges
« Reply #31 on: April 03, 2022, 07:47:22 pm »
I considered a pi and a Kade and chose otherwise.  We are into retro gaming because it is expensive and inconvenient.

 :lol

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Re: Making SEGA Genesis cartridges
« Reply #32 on: April 09, 2022, 07:27:09 pm »
So the secret to pulling off old labels from sports games is charcoal lighter fluid.  I’m not sure why I bothered with anything else.  Let it soak, then just peel it off.  Simple Green will etch the plastic so be careful.

Anyway, still waiting on those 2MB EPROMs to arrive, so I’m dinking around and finding more games that need a 4MB chip.  Here’s Metal Dragon, which is exactly 4MB.



A very weird game that rips off elements from many others.  But it’s nice to play something new.


 :cheers:

« Last Edit: April 10, 2022, 02:27:13 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #33 on: April 19, 2022, 11:44:58 pm »
So, my 2MB EPROMs arrived.  All erasing and burning fine so far.

Decided to try putting two roms on one chip and using a physical toggle to select one.  And it freaking works!  Basically you do the opposite of what I’ve been doing with my jumper wires.  You can take 2 1MB roms, bit swap them individually, and combine into a single 2MB rom.  Then you burn it.  If A19 is wired to B8, you play one game.  If it’s pulled high to 5V, it plays the other one.  You, unfortunately can’t toggle by leaving it floating.  So a two way toggle switch wired to A19, 5V, and B8 and you’re good to go.

Here’s my super scientific test where I played it one way, then bent out the chip leg, and ran a jumper wire to 5V.  I got Mutant League Football and Road Rash 2, both 1MB roms, working.






And….





Guess what, it also works with 4MB chips.  Instead of A20 to B9, you do B9 to 5V.  Leave A19 wired to B8.  I got Mutant League Hockey and Football on the same cart.  Football was first padded to 2MB with FF, checksum fixed, and then bit swapped.







In theory, you could get four games on a 4MB chip, but I think you’d have to have three toggle switches and, if my math is right,  you’d be limited to 512k, 512k, 1MB, 2MB (or if smaller, then padded to that for each slot).


For now, I’m just going to leave it at two games with a physical toggle.  Maybe I figure out the circuit to switch them by hitting the reset button but it feels like too much rigmarole.


In other news, confirmed that saving on a 2MB game (Monster World 4) works perfectly on a donor Troy Aikman Football.

Sorry, Troy.

 :cheers:
« Last Edit: April 19, 2022, 11:52:46 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #34 on: April 20, 2022, 12:32:05 am »
More scientific than I could've pulled off!
Super fun stuff and nice work.
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #35 on: April 21, 2022, 05:50:37 pm »
Quote from: pbj
In other news, confirmed that saving on a 2MB game (Monster World 4) works perfectly on a donor Troy Aikman Football.
I think we can all agree it's what Troy would've wanted...

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Re: Making SEGA Genesis cartridges
« Reply #36 on: April 21, 2022, 11:22:12 pm »
If I ever meet him, I’m making him autograph a copy.

As a grubby foreigner, you’ll never understand what Troy Aikman meant to a kid living in Dallas.  We all know we were drafting him and I saw his last college game in person at the Cotton Bowl.  Nobody in those stands gave a ---fudgesicle--- about Arkansas or UCLA.  We soon bought a 27” SONY TV because we knew things were changing.  $800 in 1989.  Can you even imagine?

But since you’re a kindred SEGA spirit, make up a list and we will make your cartridge dreams come true.

 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #37 on: April 22, 2022, 06:03:01 am »
Well, as someone that generally hates sports games and loves the Wonderboy/Monster World series, you've already made that dream come true... 💖

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Re: Making SEGA Genesis cartridges
« Reply #38 on: April 22, 2022, 08:18:00 am »
We soon bought a 27” SONY TV because we knew things were changing.  $800 in 1989.  Can you even imagine?

For some models, those prices are coming back. The sellers put "retro" in front of the description, and another "0" on the end of the price.
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Re: Making SEGA Genesis cartridges
« Reply #39 on: April 23, 2022, 12:08:48 am »
Made a few carts tonight.

 :cheers:


















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Re: Making SEGA Genesis cartridges
« Reply #40 on: April 23, 2022, 01:16:16 am »
From soup to nuts it appears-!
You printing those labels yourself?

If there was a market for a few specific titles that commanded some good $$ you could easily have a self-funding fiasco here.
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Re: Making SEGA Genesis cartridges
« Reply #41 on: April 23, 2022, 05:02:54 am »
Is the lighter fluid alcohol (probably methanol or ethanol) based? If so, you might find it just as effective, though cheaper, to try some plain old metho or isopropyl, (though they may smell a bit more). Just an idea.
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Re: Making SEGA Genesis cartridges
« Reply #42 on: April 23, 2022, 09:15:18 pm »
Lighter fluid is $1.50 here for a 32oz bottle.  I have 4oz in that plastic food tub and so far I’ve removed six labels.  Put the lid back on and it doesn’t evaporate.  I’m good.

Labels are printed on a color laser on full sheet mailing labels.  I can get six per sheet and have enough room to make EPROM labels.  The sheets are 10 cents each.

Here’s a 42 pin 2MB eprom running a half megabyte game on a 40 pin pcb.  Legs 1 and 42 are bent up and tied to ground.  Works perfectly.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #43 on: April 23, 2022, 10:49:53 pm »
Made a few carts tonight.


Killin me smalls. I spent like 2 hours making a pretty convincing Ys III repro label for you and you used the red label boot? boooooooo
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Re: Making SEGA Genesis cartridges
« Reply #44 on: April 24, 2022, 12:57:59 am »
No ragrats.

Pics are more bootlegs I’ve spit out tonight.  Both have been patched for better colors.  Two games I could never find in the 90s for any price.

 :cheers:




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Re: Making SEGA Genesis cartridges
« Reply #45 on: April 26, 2022, 12:50:33 am »
So, Wonder Boy in Monster World is an interesting one.  I was doing some reading on the various saving methods and there’s a PDF out there that talks about the serial eeproms and all that.  Basically I’m trying to figure out which worthless sports games with saving circuits can be converted.

https://krikzz.com/pub/support/everdrive-md/v2/gen_eeprom.pdf


Turns out Wonder Boy uses the same set up as Sports Talk Baseball.  So, I burn the ROM on a 2MB chip.   On my 2MB SRAM tester pcb, the game boots up to the title screen.  You hit start and it attempts to check for a save file and it locks.  No error message, nothing.  Totally locked.  I mean, this is a very early game so I can kind of understand it but I guess you’re boned if any of the save game chips fail.

Anyway, when soldered to the Sports Talk Baseball pcb, it won’t even boot.  After the panic subsides, I decide it has to be related to pin 42 on the eprom.  By default on this board it’s already connected to 5V, which ordinarily disables that line and makes it act like a 1MB chip.  I cut that connection and jumped it to ground and we’re in business. Playing and saving perfectly.



Monster World 4 also working perfectly on that Troy Aikman pcb with a new battery.  Some of the soldering jobs on the old batteries are beyond terrible.  Lot of kids out there with games that never worked right I imagine.

Okay, so onwards to another experiment.  I’ve got all these damn EA boards, they’ve all got complicated saving circuitry, and I don’t want to do 20 jumper wires and trace cuts like I did on my first copy of Blades of Vengeance.  My theory is that so long as the rom is the same size or smaller as what was on the donor board, a new game shouldn’t ever try to address the saving circuits and it’ll just run cheerfully ignoring half the pcb.

Grabbed a copy of Madden 93 and burned a 1MB Blades of Vengeance without any padding.

The EA pcbs are such a pain in the ass.  SEGA boards you kiss with the desoldering rig and I swear you can just shake the old rom chip off.  EA omfg.  Even with hog flux, I wasn’t having much luck.  The eventual solution was to snap off the rom, then add fresh solder to the legs, and then desolder.  That worked well.

So, my theory was right.  Boots and plays fine and I didn’t do a thing to the pcb. 







« Last Edit: April 26, 2022, 01:01:24 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #46 on: April 26, 2022, 11:44:56 pm »
EA boards are such a pain in the ass I may start throwing them away…. Or upgrade equipment.

Two hours later and a jumper wire from pin 42 to ground and here’s Madden 93 running Micro Machines.


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Re: Making SEGA Genesis cartridges
« Reply #47 on: April 27, 2022, 02:25:50 pm »
Turns out my desoldering iron was clogged in the metal tubing.  Since I no longer rent and don't want to stick this thing in a fire place, to the grill it went.

20 minutes with all burners going and the thermometer pegged on danger cleared it right out.



Here's my high tech drying system for shells that have been soaked in lighter fluid and then rinsed with water.

« Last Edit: April 27, 2022, 02:54:20 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #48 on: April 27, 2022, 09:29:56 pm »
Gotta love simple-

How's the paint on the grill lid holding up?!
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Re: Making SEGA Genesis cartridges
« Reply #49 on: April 29, 2022, 10:09:53 pm »
I like that you included the spatula/flipper, for context, in that grill shot
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Re: Making SEGA Genesis cartridges
« Reply #50 on: May 09, 2022, 11:39:53 am »
So, I figured there had to be a quicker way to clear clogs, and found out this works really well.  Keep the flame on the tube until you burn your thumb, and then turn on the vacuum.  You'll watch a molten turd go flying down the tubing.  Quite satisfying.



I have officially thrown in the towel on depopulating EA pcbs.  I don't know what the hell kind of solder they used, but it's taking me over an hour per cartridge to get the holes clean.  Oddly, it's the same pins that are problematic.  Maybe the carts ran hot and quietly smoldered?  My best strategy has been to do as many pins as I can, then break off the ROM chip (oh no, RIP Madden 93) and individually do the remaining pins.  THEN I put my tubing on the exhaust port of the vacuum and blow the remaining solder out of the back of the PCB.  THEN I take a thumb tack and manually force it through the holes.  One by one by one by one by one.

So, enter this reproduction board:

https://www.tindie.com/products/ryanbatesrbg/repro-pcb-for-sega-genesis-mega-drive-eproms/

I emailed the creator and he had a few in stock.  I ordered them all. I will be placing an embarrassingly larger order soon.

He did a very, very nice job on these PCBs.  You can use surface mount or through hole parts.  The chips drop right in.  He put the 2MB / 4MB jumper on the back of the board so you can still change it when you make a mistake and have already soldered the EPROM on.  (there's another prominent seller that puts the jumper under the EPROM which is the dumbest design I've seen in ages.  It's a breathtakingly stupid setup)  The connector edge is beveled, the corners are rounded.  Every complaint people have about other repros has been addressed with these.


Here's Metal Dragon, a 4MB eprom, using actually correct parts values for the capacitors (47uF 16V for the electrolytic and 0.1uf for the other one).



And here's Mutant League Hockey, a 2MB chip, and "eh, kind of close enough" parts.  2x10uF caps or something like that and I can't even remember what the ceramic capacitor is.



And the PCBs drop in beautifully in both EA and Sega cases:



And here's where I confess I've made a rather expensive and large purchase of games.  So... whenever any of you is ready for some Genesis games, please get in touch.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #51 on: May 09, 2022, 09:48:38 pm »
So, I figured there had to be a quicker way to clear clogs, and found out this works really well.  Keep the flame on the tube until you burn your thumb, and then turn on the vacuum.  You'll watch a molten turd go flying down the tubing.  Quite satisfying.



This looks like some hardcore drug thing that I'm too naive to know about.

I've been enjoying your cartridge making venture.   :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #52 on: May 16, 2022, 11:46:17 pm »
I’ve been buying boxes of ---steaming pile of meadow muffin--- just to see if I still feel lately.

Got real excited… a Tengen cartridge with no label and the serial number on the chip couldn’t be found on Google.  Maybe it was some variant of Grind Stormer and I was gonna be famous.

Tengen pcbs are absolute crap, btw.  Reflowing the pins got nothing out of it, so I popped the chip…about half the solder pads were destroyed in the process, too.



Put this turd in my tester boards and nothing,  so pulsed some voltage through each pin doing a diode check.

And here we are…



So, who knows.. maybe this is some earlier variant.  It wasn’t released until 1994 by Time Warner, and my PCB was labelled 1993 Tengen.


 :timebomb:

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Re: Making SEGA Genesis cartridges
« Reply #53 on: May 17, 2022, 01:56:34 am »
I love this thread.
At the rate you are going you are bound to start finding some really weird ---steaming pile of meadow muffin---.
I'm looking forward to it myself.
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Re: Making SEGA Genesis cartridges
« Reply #54 on: May 31, 2022, 10:02:43 pm »
This one had been vexing me for awhile.  There’s a few 3MB games that are split across two 2MB chips.  The ones of note are Sonic Complete, Beyond Oasis, and Phantasy Star 4.  The worthless ones are World Series Baseball 95 and 96.

You actually split the rom into two chunks - the first 2MB and then the last 1MB.  Put the 2MB chip in the bottom slot, 1MB in the top.  Every pin should buzz out continuous to each other except for Chip Enable.

Here’s my beast of a test cartridge.  Didn’t work at first, it was a bad connection on the top chip pin Q15A-1.  I was getting all kinds of weird behavior until I went pin by pin and compared it to an unmolested board.  Anyway, scrape scrape on the solder mask and dragging a drop of solder down the trace and we’re good to go.



And here’s World Series Baseball turned into something I might play some day.  Couldn’t afford this in the 90s….



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Re: Making SEGA Genesis cartridges
« Reply #55 on: June 02, 2022, 07:36:15 am »
oh boi, now I can have a working "Beyond Oasis"
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Re: Making SEGA Genesis cartridges
« Reply #56 on: June 02, 2022, 10:27:59 am »


I really love this ---steaming pile of meadow muffin---.

This thread is awesome.

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Re: Making SEGA Genesis cartridges
« Reply #57 on: June 05, 2022, 01:01:15 pm »
Yep!  Cave Story for sure and a few others.

incase anyone else is makin carts, here's a cavestory label made in the old genny label style
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Re: Making SEGA Genesis cartridges
« Reply #58 on: June 06, 2022, 11:07:41 am »
Cave Story is proving to be a tough nut to crack.  A few people have made saving copies of it, but they're also selling them for $30 and not giving too many details on how they got it working.  I'll keep chipping at that one.

Anyway, lots of progress this weekend.  Got my reproduction circuit boards in, actual flux, new components, couple of jugs of lighter fluid, new desoldering tips, and away we go.



By the 10th board, I had gotten reasonably decent at these SMD capacitors.  Tiny drop of flux, hold it in place with my left fingernail, touch it with the soldering iron that had a small drop of solder on it. Once one side was done, the other was easy. 



The other capacitors are SMD 47uf 16V, but you can pop off the bottom and you have tiny little legs.  Those legs line up perfectly with the holes on these repro boards.  My only gripe on these repros is the guy didn't give the legs enough exposed copper on the back to have solder bite them into place easily, but he's going to make a revision one of these days.  It's still doable but you need to double check the joint.

Anyway, here's a bunch of trash game shells that gave up treasure like Madden 94 and Coach K College Basketball so that better games may collect dust on my shelf.



Wait a second... wasn't Super Off Road an Accolade game?  And why is that EA Marble Madness running the Japanese Tengen ROM.  In 2022, all things are possible.



I've been scooping up cartridge lots for copies of World Series Baseball 95 and 96.  Most of them have looked brand new once cracked open... and then there was this gem....



What the hell... this is all a waste of time and effort anyway.  I scrubbed it down with a steel wire brush and lighter fluid (god bless lighter fluid) and reflowed all the solder joints.



And check this out....



I'm still contemplating if I'm going to trust this board with a different game on it.... 82 pins...
 
And here's what one of these PCBs that isn't totally roached out with battery acid looks like when the ROMs, battery, and old capacitor are removed.  These have all been replaced by new parts and it runs Phantasy Star IV now.   ;D


« Last Edit: June 06, 2022, 11:12:18 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #59 on: June 07, 2022, 12:11:25 am »
Here’s tonight’s batch.  Spent 11 hours at a keyboard today, figured I needed to do something fun.

Pulse Man was patched with a Game Genie code that defeats the region check.  Valis, Shinobi, Strider, Ghostbusters, Ghouls N Ghosts were all games I owned as a kid.  The others were ones I wanted.  Try selling this box for $20 the week after I move out, mom.

 :cheers:




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Re: Making SEGA Genesis cartridges
« Reply #60 on: June 07, 2022, 11:43:49 pm »
Here’s some I made for someone else….



And here’s a couple for me….




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Re: Making SEGA Genesis cartridges
« Reply #61 on: June 08, 2022, 03:11:27 am »
What's the first one with the Boris flavor artwork you made for yourself?

And whenever you are ready to stop teasing with pinball machines in the background and just sell me one already... I'm ready.
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Re: Making SEGA Genesis cartridges
« Reply #62 on: June 08, 2022, 12:10:16 pm »
That's Golden Axe 2, the Genesis only sequel.  I played through it dozens of times as a kid.  Jammed a couple levels last night and I still like it.

Getting a pinball machine to an island is going to be a nightmare of container shipping.  You're better off finding a west coast distributor hustling Sterns that will put one on a boat for you.  Bring money.

 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #63 on: June 08, 2022, 08:58:18 pm »
Yeah, the logistics of pin transport are going to suck.
And I was stunned at how much even older machines command presently.
Yeesh.

Made me wanna go fire up the mame box and play some Golden Axe.

Have you rec-reated your grail Genesis game yet?
That system does look like the pinnacle of cartridge machines I would say.
I've never owned one.
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Re: Making SEGA Genesis cartridges
« Reply #64 on: June 08, 2022, 09:54:10 pm »
That's Golden Axe 2, the Genesis only sequel.  I played through it dozens of times as a kid.  Jammed a couple levels last night and I still like it.
Its the best golden axe on the system. Shame Revenge of Death Adder never got ported to anything.  I mixed up 3 with 2 in my head, so you gotta print me a 2 label and I'll reflash my 3 cart with 2


Have you rec-reated your grail Genesis game yet?
That system does look like the pinnacle of cartridge machines I would say.
I've never owned one.
Genesis and SNES , each with their perks and caveats. if you can get your hands on a genny, get it. Lots of great games at great prices still, plus I know a guy who can make you the rare carts pretty cheap.
I am still kinda shocked that the Super Baseball 2020 port is so good, and I didnt know it even existed till a couple months ago when I got it in an eBay lot.
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Re: Making SEGA Genesis cartridges
« Reply #65 on: June 09, 2022, 12:48:26 am »
So, “grail cartridge” is probably an even mix of Crackdown, Wrestle War, and Phantasy Star 4.  I’m 2/3 there.

Yeah, you can still get a lot of CIB genesis games for $10-15 shipped.  That’s how you start.  Then you realize you hate dealing with the cases and now you’re paying $5-10 each for loose carts.  Then you realize the carts are just a simple PCB and a rom chip and you end up like me.  Buying huge lots of crap because you’re trying to lower your average buy price.  Then you think, hm, I need something to store all these carts in.  I kept good records of expenses and stopped tracking around $600.  I’m probably currently in for double that.  Oh well, make it spend it.

Personal cartridges on the left, commissioned cartridges on the right.

 :cheers:



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Re: Making SEGA Genesis cartridges
« Reply #66 on: June 09, 2022, 01:52:11 am »

I was wondering if you were going to take some cart pics on top of your Alien Poker.   ;D

How are those 3d printed drop target guides from four years ago holding up?

 


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Re: Making SEGA Genesis cartridges
« Reply #67 on: June 09, 2022, 11:53:03 am »
They've held up beautifully.  Some day, collectors are going to appreciate your work on those as the only alternative is stripping them off another 20-40 year old game.  Trying to source those was probably my last interaction with only sort of online pinball community.  I was met with the same idiotic snark and useless replies that drove me out of those circles in the first place.

 :cheers:






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Re: Making SEGA Genesis cartridges
« Reply #68 on: June 09, 2022, 12:09:03 pm »
Personal cartridges on the left, commissioned cartridges on the right.

I like my version of the genny label better (based on the SNES label) over the retail one. You can put whatever you want of mine in EA cases, no ---smurfs---, I just wanna play the games.


Wonderful derail by a moderator though, really top notch "lead by example" behavior.
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Re: Making SEGA Genesis cartridges
« Reply #69 on: June 10, 2022, 02:57:11 am »
So, “grail cartridge” is probably an even mix of Crackdown, Wrestle War, and Phantasy Star 4.  I’m 2/3 there.

Yeah, you can still get a lot of CIB genesis games for $10-15 shipped.  That’s how you start.  Then you realize you hate dealing with the cases and now you’re paying $5-10 each for loose carts.  Then you realize the carts are just a simple PCB and a rom chip and you end up like me.  Buying huge lots of crap because you’re trying to lower your average buy price.  Then you think, hm, I need something to store all these carts in.  I kept good records of expenses and stopped tracking around $600.  I’m probably currently in for double that.  Oh well, make it spend it.

Personal cartridges on the left, commissioned cartridges on the right.

 :cheers:



It's all such a slippery slope.
The $$ becomes meaningless past the $1k mark, doesn't it?
This is easily my favorite thread on any forum anywhere presently.
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Re: Making SEGA Genesis cartridges
« Reply #70 on: June 13, 2022, 11:56:58 am »
So, a small history lesson here.  Statue of limitations should have long passed, so ---fudgesicle--- it.  Texas A&M had a very weird, old building creatively called the "Special Services building."  When I was a student there 20+ years ago, my interactions with it were an underground laundromat (underground anything is unusual in Texas) and then jiggling an outside door and wandering around the inside at night.  Genuinely felt like a scene from Resident Evil or Silent Hill on the inside.

We step forward in time a couple of years, and I was providing IT support back in the "have you turned it off and back on?" days.  I was officed in yet another weird, old building, but the central IT guys were in this one.      They spent their days eating cheeseburgers, smoking cigarettes, and playing Diablo 2 on a state server.  In fact, my first trip out there for "training," I got handed a stack of burned Diablo 2 discs, given login details to their dialup internet service, and sworn to secrecy.  Predictably, I needed an awful lot of "training," usually the day after a new South Park episode had been ripped and put on the internet.  So I'd hop in the state owned station wagon and pay them a visit.

Eventually, one of them figures out that he can unlock the door and get out on the veranda.  An aluminum picnic table from outside one of the dorms miraculously appeared up there.  Then a grill.  Then eventually a pop up gazebo for shade.  Then one of us gets a Mexican girlfriend who makes tortillas, and the business school (where C students like me went) was next to the campus meat store and I would grab packages of sausage.  There is little in life better than grilled subsidized sausage, fresh flour tortillas, mustard, and a cheap cigarette on the clock.  It was actually ---fracking--- ridiculous we got away with all this.  The perspective from this old photo was taken is where eventually a girls dorm was built, so lots of time was spent hoping someone forgot to close their blinds.


 
So what does this have to do with this thread, you ask?  Well, all good things come to an end.  They knew the building was rickety and would periodically inspect cracks in the walls.  One guy's girlfriend, who also worked in the building, said, "hey if you think those are bad, come look at THIS one!"  It had spread over an inch in less than a month.  The building was condemned and we were given 48 hours to clear the contents.

Since it was a "famous" building, former student hospital, blah blah, it got some media coverage.  The university sent out one of their slick PR guys, who took one look at us smoking on our party porch and said, get that ---steaming pile of meadow muffin--- off there now and if any of you go out there again, you're fired.

The upside of all this is that it's really, really easy to write off state property as "destroyed with building" and all of us were loading our trunks with surplus loot.  I had a Weller soldering station I used for many years out of that smash and grab.  I finally gave up on repairing it and replaced it with some Yihua station a few years ago.

So, the last remnant of computers, monitors, video cards, components, etc that, er, a friend of a friend who's name I can't remember brought home was a roll of Kester 44 solder.

21 years later.... the roll has been used up....



 :cheers:







« Last Edit: June 13, 2022, 11:59:01 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #71 on: June 13, 2022, 12:38:58 pm »
Good one.
Always love the "can't make this ---steaming pile of meadow muffin--- up" stories.
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Re: Making SEGA Genesis cartridges
« Reply #72 on: June 13, 2022, 12:42:22 pm »
Pics or none of it happened.

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Re: Making SEGA Genesis cartridges
« Reply #73 on: June 13, 2022, 01:23:42 pm »
Pics or none of it happened.

My first access to the internet, before it was ever accessible to the general public, was through a dial-up given to me by a friend who was an IT guy at a major university, with a similar informal NDA attached.  He always had lots of cool toys which were "rescued from the dumpster" and I got to wander the labs occasionally and see stuff I could never afford.  The story checks out.

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Re: Making SEGA Genesis cartridges
« Reply #74 on: June 13, 2022, 01:45:19 pm »
Pics or none of it happened.

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Re: Making SEGA Genesis cartridges
« Reply #75 on: June 13, 2022, 09:49:28 pm »
This is what's left of what I took from the factory I worked at when it closed 20 years ago.  I was told to throw cases of it in the dumpster.  Sold most of it on ebay.  The power supply is also from there.

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Re: Making SEGA Genesis cartridges
« Reply #76 on: June 15, 2022, 09:32:02 am »
This popped into my head this morning and I had to make it real.

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Re: Making SEGA Genesis cartridges
« Reply #77 on: June 15, 2022, 11:28:05 pm »
Very nice!  I had a good haul a few years ago when a vestibular lab got shut down and they threw away all the supplies and tools.  I still have a sealed box of NIB tools from that haul I haven’t touched.  Mike is free to search my comment history and find the pics.

Anyway, we’re on the final countdown of my wishlist and the carts my slave driver wants.  It’s completely absurd but now I’m using 4MB EPROMs for games that don’t use SRAM.  I bought 100 2MB EPROMs and about 13 of them are bad.  Of the 40 4MB chips, they’ve all flashed.  Even the ones with bent to hell legs thrown loose in an envelope.

I’m also getting low on donor SEGA cases so I’m continuing to slap the random games into EA cases with modified labels.  My life goal is to confuse some nerdy kid at an estate sale in a few years.  Maybe my wife will get $20.

Just one completed cart tonight, but a bunch of chips burned….. this game is ubiquitous on EBay and actually very fun.



That’s the old roll of solder on the left and the new one on the right.  Let’s see if it lasts 21 years.

 :cheers:

« Last Edit: June 17, 2022, 11:55:42 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #78 on: June 17, 2022, 11:51:30 pm »
I am officially at the “why…..?  Why me?” stage of this nonsense.  I just purchased “more than 50” EA carts for about 75 cents each.  So I guess I’m commissioning another run of repro pcbs.  Again.

I’ve gone through 100 2MB EPROMs.  13 were bad.  Mike_A suggested trying a slower speed.  That got 2 of the bad ones to flash.  One failed verification, but I dumped it and byte 64 was a dash instead of a zero and the genesis happily ignores that section.

Anyway, here’s another batch of games.  One was originally EA, the rest weren’t.

« Last Edit: June 17, 2022, 11:53:06 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #79 on: June 18, 2022, 12:36:06 am »
You are doing God's work  :applaud:
Check out my completed projects!


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Re: Making SEGA Genesis cartridges
« Reply #80 on: June 20, 2022, 12:36:09 am »
So far, I haven’t had to tie up Isaac and take him to the mountaintop but it occasionally feels like it.

Made another batch today.  Sonic Complete I’m particularly proud of - a 4MB rom split across two 2MB chips and soldered onto a World Series Baseball 95 pcb.  New battery and filter capacitor, it should last awhile.  A couple other games slapped onto a common genesis SRAM pcb.  The others are on repro boards in worthless sport game shells.  When I’m in Hell with Joe Montana I hope he’s like, “why did you kill so many of my cartridges?”  And I’ll be all like, “I’ll never forgive you for that NFC Championship and 74 cents each, bro.”

Cave Story and Starflight continue to vex me.  My slave driver also wants Barkley 2 on an Accolade pcb and they’re just as bad as EA.

Anyway, the madness continues….


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Re: Making SEGA Genesis cartridges
« Reply #81 on: June 20, 2022, 03:16:22 am »
80 posts and this monument of build your own has already spun out of control on you.
 :cheers:

Love it.
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Re: Making SEGA Genesis cartridges
« Reply #82 on: June 20, 2022, 07:25:05 am »
My slave driver also wants Barkley 2 on an Accolade pcb and they’re just as bad as EA.

*wha-pshhhhhh*

You can put Barkely 2 in an EA case if its too much of a pain in the bootay.  Wonder if anyone noticed I flipped the hero on the Shining Force 2 label? I am down right GIDDY for Grind Stormer
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Re: Making SEGA Genesis cartridges
« Reply #83 on: June 20, 2022, 10:45:41 am »
A few more this morning....

 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #84 on: June 21, 2022, 10:58:59 am »
Anyway, it's time to reclaim the gameroom and decommission the Genesis factory for awhile.  I've got ~30 more repro boards prepped with capacitors and 50 more EPROMs on the way from China.  A large box stuffed full of games is en route to its new home.

But we had to go out with one final bang, of course.  After I swore I'd never touch an EA board again, Malenko had a specific request for Barkley Shut Up & Jam 2 in an Accolade cartridge.  Oddly, the two Barkley games shipped in both Sega and Accolade shells.

So, I cracked open a copy of Hardball 95, a saving Accolade PCB from the same time period as Barkley.  The chip was very resistant to being pulled, I had to break it into pieces and pull it off forcefully.  Then came the nightmare of trying to clean the holes out.  Shop vac desoldering rig on both settings (suck AND blow!) helped some, but not much.  Heating each hole with the iron and then blowing on them as hard as I could helped some, but not much.  Nothing like a hot soldering iron two inches from your face.  Flux and copper braid helped some, but not much.  Then traces stared vaporizing and that was that.  3 hours of my life - gone.  I cannot figure these EA and Accolade boards out. 

Well, then I get a stupid idea... can a Sega board be crammed into an Accolade case?  And the answer is YES!  It will just barely fit over the mounting posts in the shell.  The fingerboard juts out a little too far, and you have to notch out some of the plastic (unseen) so that the filter capacitor legs are clear.  Other option would be to mount the capacitor elsewhere on the PCB, but eh.

To my knowledge, there's only one Barkley 2 ROM out there, and since we know it shipped on both types of PCBs, I put the chip on a 171-6278A board.  This seems to be the most widely used 2MB eprom saving PCB.  I've got dozens of them loose in a box now.



And damned if it didn't work.  My team "GAMESUX" and their losing record was successfully saving.

Other semi-interesting thing about this is that an Accolade label is very close in size to an EA label with the title spine clipped off.  So that's how we designed the label.  Close enough.

I present my Frankenstein abomination game:



 :cheers:
« Last Edit: June 21, 2022, 05:45:17 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #85 on: June 21, 2022, 07:59:10 pm »
I present my Frankenstein abomination game:
Actually that's *MY* abomination, and I will cherish it forever.


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Re: Making SEGA Genesis cartridges
« Reply #86 on: June 22, 2022, 02:46:41 am »
I present my Frankenstein abomination game:
Actually that's *MY* abomination, and I will cherish it forever.

I've now lost track of who is Dr. F and who is Igor...

-Blucher!
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Re: Making SEGA Genesis cartridges
« Reply #87 on: June 24, 2022, 06:20:49 pm »
I'm Venom, he's Eddy? I dunno.


All I do know is my mailman delivered a box to my porch from about 6 feet away, but everything seems to have survived.  Ive already mixed the boots in with the legits, cause I dont give a ---fudgesicle---.


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Re: Making SEGA Genesis cartridges
« Reply #88 on: June 24, 2022, 10:48:26 pm »
So, I kinda hate to give this secret away but Napa Valley cassette crates hold 12 genesis games perfectly, as shown in his picture.  In bulk, you can nab them for $5-6 shipped.  I bought a crate of 14.  And 8.  And 5.   :-\

I also gambled on a weird eBay lot and came out okay.  Not great, but okay.  53 games for ~87 cents each.  I’ve got 50 more EPROMs coming from China.  I’ll probably another batch of repro pcbs in the works.  Malenko and I have nice templates for making regular game labels fit onto EA cases.

 :cheers:

« Last Edit: June 24, 2022, 10:50:01 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #89 on: July 05, 2022, 10:30:33 am »
My genny collection is super happy on its new shelf.


and I moved the genny from the CRT TV over to the 2nd cubby slot (PS2 got booted)


I didnt have the foresight to put Barkley 2 up on the TV.
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Re: Making SEGA Genesis cartridges
« Reply #90 on: July 05, 2022, 11:27:27 am »
Great looking space.

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Re: Making SEGA Genesis cartridges
« Reply #91 on: July 05, 2022, 01:16:47 pm »
Just trying to make the unfinished space usable till I end up finishing it too. Last place I finished the basement and we sold the house 3 weeks later.
linkie: http://forum.arcadecontrols.com/index.php/topic,160077.msg1684316.html

Right now I'm in the middle of a master bath / closet renovation then I think my wife wants the Laundry moved to the second floor, it never ends.


back to the subject at hand:


When you slightly mess up the labels, they look more real and less bootleggy :)
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Re: Making SEGA Genesis cartridges
« Reply #92 on: July 05, 2022, 01:41:03 pm »
I run a sharpie sideways around the edges of the labels after I cut them out.  Hides that white leading edge.  Nobody will ever notice or care, but deep down, we'll know.


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Re: Making SEGA Genesis cartridges
« Reply #93 on: July 13, 2022, 09:52:16 pm »
I’ve been making a few here and there, but mostly I’ve been waiting on my latest batch of EPROMs to arrive.  This takes me up to 175 EPROMs purchased.  Of the 25 4MB EPROMs, all have flashed so far.  Of the first batch of 50 2MB EPROMs, 37 flashed.  Of the second batch of 50, 50 flashed.  So who knows with this latest pile..



With all this newfound SEGA knowledge, I’ve been watching this ridiculous auction on eBay for two loose pcbs get posted over and over for a couple of months.  Based on the MPR number, I was 99% sure they were Altered Beast and Thunderforce 3.  I wanted an Altered Beast and TF3 is “worth money.”  However, Thunderforce seemed to be a variant I couldn’t find online, but the five digits matched up to known copies.  Suffix is supposed to designate brand of ROM or something.

Anyway, here’s a common TF3:



And here’s what I bought after a lowball offer, Altered Beast up top:



So it’s been a long three days but the moment of truth arrived:



These have been moved to shells and given new covers:






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Re: Making SEGA Genesis cartridges
« Reply #94 on: July 13, 2022, 10:37:19 pm »
Wow, nice!

Loving this original artwork

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Re: Making SEGA Genesis cartridges
« Reply #95 on: July 14, 2022, 04:38:49 pm »
you could use this?

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Re: Making SEGA Genesis cartridges
« Reply #96 on: July 14, 2022, 10:16:52 pm »
The post it note had some kind of jenny say kwah about it but I couldn’t do them wrong like that.




 :cheers:
« Last Edit: July 15, 2022, 10:02:13 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #97 on: July 15, 2022, 09:17:51 am »
jenny say kwah

I laughed way too hard at that. je ne sais quoi

That Cotton label looks amazing. You must know a really talented artist.
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Re: Making SEGA Genesis cartridges
« Reply #98 on: July 17, 2022, 12:09:02 am »
Made 9 more today.  Bad Omen / Devilish is actually very good.


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Re: Making SEGA Genesis cartridges
« Reply #99 on: July 17, 2022, 02:21:44 am »
STILL my favorite thread-

Is there a count for how many Sega Gensis cartidge titles there actually were BITD?

And then of course how many of those are pbj approved of course.
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Re: Making SEGA Genesis cartridges
« Reply #100 on: July 17, 2022, 03:29:31 am »
This may not be possible... but an interesting idea, would be to make Sega Master system carts,
inside of a Genesis cart.. where the converter is built into the cart.

 That way, you could play SMS games, without the need to pop in the converter.

 I think the Power Base Converter, is just a different wiring pinout.

 The most challenging cart, would be a way to incorporate the 3D glasses adapter.

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Re: Making SEGA Genesis cartridges
« Reply #101 on: July 17, 2022, 07:19:05 pm »
It’s possible but SEGA Master used mapper chips and such that Genesis didn't.  I spent a lot of time researching it. You can get a universal sms cart for $20, and a converter for $20.  Or get a clone genesis everdrive for $20 that runs the roms. 

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Re: Making SEGA Genesis cartridges
« Reply #102 on: July 23, 2022, 11:51:47 pm »
Have spit out a few more in the past few days.  More games that didn’t originally come in EA cases.  I’m actually getting very low on repro boards and SEGA shells.  I need to make some decisions about how much further I’m taking this.

Anyway, latest batch of EPROMs came pretty smashed.  Now I’m scrapping away parts of the chips and soldering wires to tiny metal nubs to recreate broken chip legs.  Even more hackery.



That Crusader of Centy cart is actually running a SEGA pcb.  The rom chips desolder very cleanly on them.  So it’s some random sports pcb that’s been converted.  New battery and filter cap, it will outlive Malenko.

Dick Tracy is actually very good and violent as hell.  I haven’t gotten very far but it’s interesting.  I always thought the screenshots looked awesome but I never played it back in the day.

Captain America is a decent port.  It has a color palette hack.

Oddly, despite the “going ape spit” cover art, Toki appears to just be Toki.



Marvel Land is another one I never actually played until I made one.  Haven’t gotten far but appears to be a good Super Mario rip off.

El Viento is running some improvement hack.  It’s another oddly good but weird game.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #103 on: July 25, 2022, 11:33:44 am »
Centy looks amazing. I hated that all the bootleg covers had the sword vertical instead of horizontal, so I like mine better.

Your Captain American label looks great, looks legit as heck.
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Re: Making SEGA Genesis cartridges
« Reply #104 on: July 25, 2022, 05:38:42 pm »
WOW,

Haven't been on BYOAC lately, This is amazing!!!

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Re: Making SEGA Genesis cartridges
« Reply #105 on: July 27, 2022, 01:28:26 pm »
Thanks, Locke.  The only thing better than reading this thread is getting your hands on some beautiful Genesis reproduction cartridges.   :lol

I'm currently causing another price bubble on the auction sites.  I need more Sega shells.  Alternative is to buy reproductions from China but that feels like throwing in the towel.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #106 on: August 08, 2022, 12:26:11 am »
So, a little more action this weekend.  First I split my games into SEGA vs EA shells and alphabetized each stack.  I’m at around 150 games now.



A loved one has burned through a couple of clone Genesis consoles and I threw in the towel and bought him a “dead” one for $30 shipped with two controllers and three games.

The problem was quickly identified:



Two screws were missing from the case so the motherboard was shifting around whenever you plugged in the power supply.  I took the entire thing apart, scrubbed and soaked and cleaned.  Reflowed that bad power supply connector solder joint and replaced the missing screws.  I also rubbed the case down with a layer of wax.




Next I was going through my games to give him a few I thought he would like.  One of them was Tengen Ms Pac-Man that was oddly on a SEGA pcb.  Wouldn’t boot.  Reflowed everything, changed capacitors, cleaned edge connector, still nothing.  So I found a YouTube video where he says that ROMs on Genesis blow internal gates if the carts are removed with the power on.  The way to test this is to put your multimeter on diode check, put the positive lead on ground, and then check each pin on the ROM.  You should get a consistent value on each non ground pin.  For me it was 0.62V.  Except for one pin.  It wasn’t reading at all.  The fix is to put a 1k ohm resistor from that pin to ground.




And it freaking worked!



Here’s the video:



https://www.youtube.com/watch?v=eCT4ZKV20RI


« Last Edit: August 08, 2022, 12:34:56 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #107 on: August 08, 2022, 05:14:21 am »
Beautiful rehab work on that console.
And in spite of my general feelings about the interwebs sometimes, the Ms. Pac repair proves that the internet is worth something.

Sweet.
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Re: Making SEGA Genesis cartridges
« Reply #108 on: August 23, 2022, 02:58:44 pm »
I, uh, bought 54 more games just for the shells.  Thankfully they're actual SEGA shells this time around, so I can quit messing around with EA and those universal PCBs.

Would be really, really swell if someone else had a Genesis around here.

 :banghead:


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Re: Making SEGA Genesis cartridges
« Reply #109 on: August 24, 2022, 02:15:18 am »
I feel like I should buy one just so I can justify buying some repro cartidges and fueling this glorious mayhem.

 :)
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Re: Making SEGA Genesis cartridges
« Reply #110 on: August 25, 2022, 07:33:12 am »
I, uh, bought 54 more games just for the shells.  Thankfully they're actual SEGA shells this time around, so I can quit messing around with EA and those universal PCBs.

Would be really, really swell if someone else had a Genesis around here.

 :banghead:

plus the 15 or so I sent you!
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Re: Making SEGA Genesis cartridges
« Reply #111 on: August 25, 2022, 02:53:48 pm »
... I took the entire thing apart, scrubbed and soaked and cleaned.  ...

I still need to diagnose my genesis's problems.  What did you use to clean yours?  Are you talking shell or the pcb as well?

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Re: Making SEGA Genesis cartridges
« Reply #112 on: August 25, 2022, 03:45:45 pm »
I spray down PCBs with charcoal lighter fluid.  If you squeeze the bottle hard enough, you'll wash the dirt off.  Then maybe a quick water rinse with the sink spray nozzle if I'm feeling risky and let it drip dry.  Otherwise just a drip dry.  I mean, put your cigarette out or whatever, but it's always worked for me.

Shell was tossed in a sink full of blue Dawn dish soap.  If it's good enough for baby ducks, it's good enough for your Genesis.


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Re: Making SEGA Genesis cartridges
« Reply #113 on: August 26, 2022, 10:41:49 pm »
I can quit anytime…..

I don’t need your help….



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Re: Making SEGA Genesis cartridges
« Reply #114 on: August 27, 2022, 05:48:44 am »
I can quit anytime…..

I don’t need your help….



 :lol   :o   :laugh2:

Holy ---steaming pile of meadow muffin---
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Re: Making SEGA Genesis cartridges
« Reply #115 on: August 28, 2022, 04:45:28 pm »
So, just to clarify... Because a friend of mine was confused....

Don't do this...



However, you can't argue with the results:



All you do is soak them for awhile and then peel the label.  If you do it carefully, you can dry out the label and reapply.  Which may come in handy for 2600 or Japanese Megadrive carts where the screws are under the label.


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Re: Making SEGA Genesis cartridges
« Reply #116 on: August 29, 2022, 02:05:08 am »
That game sucked so bad that all of them should have been set on fire.

But with a flamethrower.
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Re: Making SEGA Genesis cartridges
« Reply #117 on: September 04, 2022, 12:50:38 am »
So, I haven’t completely forsaken Genesis for Neo Geo hotness but the passion is waning.

However, there is a recent rom hack for Road Rash 3 that actually fixes it.  That game was originally such a microwaved turd sprayed into our mouths that nobody speaks of it now.  The hack fixes the frame rate and most of the taste. 

There’s also a hack of Dynamite Headdy that restores all the Japanese story mode stuff.

Mercs  on Genesis is better than arcade version.

Decap Attack is fun.

Also turned out that the box of cheap Genesis crap sports games had a copy of Ultimate Qix in it.  Bad label but works fine.  Fun game “worth” about $20ish.

 :cheers:





Also, I’ve been keeping a graveyard of the ROMs I’ve pulled off SEGA boards.  It’s actually starting to darken my soul….



« Last Edit: September 04, 2022, 01:11:39 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #118 on: September 05, 2022, 09:30:44 pm »
Made a few more…. Ristar is absolutely kicking ---my bottom---.  I’m going to gave to dig up photos of the original pcbs and see what’s going on.  Cannot get it to boot.

Rest of them good to go minus a label for Side Pocket.


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Re: Making SEGA Genesis cartridges
« Reply #119 on: September 06, 2022, 02:18:46 am »
Some imaginitive soul should be able to make some cool art piece with that pile of rom carcasses.
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Re: Making SEGA Genesis cartridges
« Reply #120 on: September 06, 2022, 11:20:59 am »
Yep, and a box of worthless EA PCBs.  CHEAP!  LMK!   :lol

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Re: Making SEGA Genesis cartridges
« Reply #121 on: September 10, 2022, 11:09:35 pm »
Everyone, check out the box that MikeA made me:



Thanks to his enabling, I can now fit 42 SEGA carts and 21 EA carts into a single box.

 :notworthy:

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Re: Making SEGA Genesis cartridges
« Reply #122 on: September 10, 2022, 11:12:32 pm »
We should all be more like MikeA

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Re: Making SEGA Genesis cartridges
« Reply #123 on: September 11, 2022, 04:37:47 am »
Everyone, check out the box that MikeA made me:



Thanks to his enabling, I can now fit 42 SEGA carts and 21 EA carts into a single box.

 :notworthy:

Outstanding.
Bonus points for the TMNT burn.
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Re: Making SEGA Genesis cartridges
« Reply #124 on: September 12, 2022, 11:13:04 pm »
So turns out my issue with Ristar was a bent pin on the console cartridge connector.  Back when I first started, I was using rig wire that was too thick and that was that.  Anyway, I used a needle to bend the pin back out and have regressed to the late 80s repair of permanently leaving a Game Genie installed.

Working on roping in another sucker, spent the afternoon popping chips.


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Re: Making SEGA Genesis cartridges
« Reply #125 on: September 18, 2022, 12:45:14 am »
Finished up a couple of carts for a forum member.  The juxtaposition of bootlegs of two of the most coveted games and his labels is amusing.


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Re: Making SEGA Genesis cartridges
« Reply #126 on: September 18, 2022, 10:28:45 am »
WOW! WHAT A DIFFERENCE.....


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Re: Making SEGA Genesis cartridges
« Reply #127 on: September 18, 2022, 09:40:28 pm »
If any of you want into bootleg Genesis games, speak up soon.  At this point I’m going to have to dump another $100 in boards and EPROMs to keep it going much longer.  I’m back to popping chips off old boards and damn it sucks.



I hope to never make a Phantasy Star 4 or Sonic Complete ever again.  Ever.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #128 on: September 21, 2022, 12:33:54 am »
Okay, finished these up.  Going to a guy that didn’t grow up with a Genesis, so the challenge was to get a definitive collection into 12 cartridges.  Figured I’d share the list but I’m not making any changes so keep your negative feedback to yourself.   ;D



I cheated a lot with that 10 in 1 cartridge, using a Brazilian Tec Toy rom.  It has Golden Axe, Revenge of Shinobi, Sonic 1, Streets of Rage 1, etc.  Nice sampling of early SEGA.

Contra Hard Corps - patched back with the life bars so you have a chance.

Crusader of Centy because nobody has ever played it and it sells for $300-400 loose.

Mortal Kombat 2 Unlimited with color patch - looks good, plays good, you can be the boss, etc.

Phantasy Star IV because nobody could afford it in the 90s and it’s still ~$90

Sonic Complete - this is Sonic 3 and Sonic and Kunckles combined and tweaked.  Excellent rom hack.

Sonic Spinball

Streets of Rage 2 - probably the best fight and go right made and I’ve played through damn near all of them.

Thunder Force IV - very nice presentation and sells for ~$75.  A good choice if you’re only getting one SHMUP.  I give it a slight edge over MUSHA.

Vectorman 2

Xeno Crisis - homebrew so good you won’t believe it’s on Genesis.  I’m curious to see how he does with it because it is ---smurfing--- hard.

Road Rash 2 - have to break the aesthetic with one EA cartridge and this is an excellent choice.


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Re: Making SEGA Genesis cartridges
« Reply #129 on: September 21, 2022, 07:33:48 am »
Its a great sampling of games. When he asks for more carts you can make him Shinobi 3 and or SoR3.
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Re: Making SEGA Genesis cartridges
« Reply #130 on: September 27, 2022, 12:37:56 am »
Never owned one of these in my youth... A care package arrived today from PBJ, and boy did he hook it up! As Malenko said, a nice sampling of games was included!

Now... It's time to blow ---steaming pile of meadow muffin--- up.


Many thanks, Jim! This ---steaming pile of meadow muffin---'s awesome! :cheers:
%Bartop

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Re: Making SEGA Genesis cartridges
« Reply #131 on: September 27, 2022, 12:02:14 pm »
I helped curate the list via text messages with Jimmers, guess he left Earthworm Jim 2 off the make list and Contra must have beat out GunStar Heroes.
I made that Vectorman 2 label just for you.

I have another spare Model 1 Genny, wonder who we can rope in next?
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Re: Making SEGA Genesis cartridges
« Reply #132 on: September 27, 2022, 07:47:38 pm »
Contra replaced a Hockey game. I despise sports. :dunno
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Re: Making SEGA Genesis cartridges
« Reply #133 on: September 27, 2022, 07:50:58 pm »
NHL 94 is legit tho, and the 2022 hack is ever gooderer.

He should have sent you Mutant League Hockey then , you can just play it as an overhead beatem up instead of hockey.
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Re: Making SEGA Genesis cartridges
« Reply #134 on: September 27, 2022, 08:04:40 pm »
Aw, he’s actually playing games instead of turning one on after another.  I sent you an NHL 94, bro.

 :angry:

Give it a shot.  Games take 10 minutes and it’s actually very good.  At least you’ll have it in the cartridge larder if a friend visits and wants to play it.

We need to decide how many carts we want so I can buy more EPROMs.  Chop, chop.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #135 on: September 27, 2022, 08:31:12 pm »
At least you’ll have it in the cartridge larder if a friend visits and wants to play it.

Friend? :laugh2:

Nobody is allowed to visit my domicile. Nobody. Single player all the way baby!

I'll look through some lists for some other stuff. Homebrews definitely interest me.
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Re: Making SEGA Genesis cartridges
« Reply #136 on: September 27, 2022, 09:08:08 pm »
I'll look through some lists for some other stuff. Homebrews definitely interest me.

The new Final Fight homebrew looks TITS
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Re: Making SEGA Genesis cartridges
« Reply #137 on: September 28, 2022, 02:04:29 am »
I wish I had the free time to ask to buy into this fiasco-
 :dunno
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Re: Making SEGA Genesis cartridges
« Reply #138 on: September 28, 2022, 07:56:36 am »
I wish I had the free time to ask to buy into this fiasco-
 :dunno


Do it anyway, you’ll find the time.


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Re: Making SEGA Genesis cartridges
« Reply #139 on: September 28, 2022, 04:13:04 pm »
You're doing good stuff pbj.

Set yourself up as a kindof "speakeasy" for homebrew carts.
Check out my completed projects!


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Re: Making SEGA Genesis cartridges
« Reply #140 on: September 29, 2022, 02:27:39 am »
I wish I had the free time to ask to buy into this fiasco-
 :dunno


Do it anyway, you’ll find the time.


:cheers:

Well, ---steaming pile of meadow muffin---...

Last console I owned was a 2600-
Where the hell do I even start?!
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Re: Making SEGA Genesis cartridges
« Reply #141 on: October 16, 2022, 03:28:13 pm »
Making some more carts for my slave driver...



One recent revelation has been that if a 2MB chip fails when it's around 1MB burnt... that means a 256Kb or 512Kb ROM will burn and play fine.  The chip will fail verification but the Genesis don't care.

So that's how Nephasth has MUSHA.  I will be testing this theory further on a chip failing around 400Kb with a copy of Rambo 3 (256Kb).  Rambo 3 is oddly a very good game that nobody owned except me back in the day.  Sells kinda high on the resale market from what I've seen.  My dusty brain recalls some invincibility trick I will have to refresh myself on, but it was still fun to play through.

I also had a 4MB chip with legs that crumbled into dust when I was messing with it.  I was able to scrape back the sides of the chip and get a metal nub exposed and solder some kynar wire to it.  It miraculously works, so now I've got a copy of Mortal Kombat 2 Unlimited with Kintaro Action Grip.

 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #142 on: October 23, 2022, 09:47:05 pm »
This one I’m kind of proud of, felt clever for the first time in a long time.  Couldn’t get Water Margin to boot no matter what I did to the No Intro rom.  So I busted out my $30 Genesis flasher that works with the cheap Chinese flash PCBs.  Well, they used to be cheap - $2-3 each.  I should have bought 500 of them and spared myself future misery.  Now they’re $10.  Anyway, the flasher can also dump cartridges, so I dumped my bootleg of Water Margin I bought from Malaysia.  Malenko made that replacement label art because it came with garbage originally.



ROM still wouldn’t boot, even though it was a clean dump.  So I put all my EPROMs in my UV easy bake oven and scratched my head for awhile.

Then I go, you know what, let’s check the header.  Sure enough, it was full of scrambled garbage.  So was the no intro rom.  I’m actually unsure how my bootleg cart even boots.  Maybe it’s fine on the chip but dumps weird.  Who knows, but my dump matched their dump.  Same scrambling.

I copied over the information from the Streets of Rage 2 header and….




They should have called this game Swamp Bandits but at least we’re in business.

 :cheers:




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Re: Making SEGA Genesis cartridges
« Reply #143 on: October 23, 2022, 10:37:41 pm »
Faster, Jim! It's starting to snow! :cheers:
%Bartop

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Re: Making SEGA Genesis cartridges
« Reply #144 on: October 24, 2022, 11:41:30 pm »
Got 50 repro pcbs in today.  Means I can crank up the pace.  I need to print a couple of labels but got seven soldered up and assembled in an hour.

 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #145 on: November 21, 2022, 10:44:40 pm »
More chips, more pcbs, more sports games shells….

Lots of home brew and rom patches in this pile.







SF2 using the Z80 for audio.  Arkagis Revolution doing sprite rotation.  No idea how they pulled that off.


I also made myself a Rambo 3.  Used to actually own this.  A very odd, very early Genesis game.  I remember screenshots in the print ads not matching up to the actual game.  The enemy sprites don’t do that flicker thing so when you get a bunch of enemies on screen it slows to a crawl.  I counted ten enemies at one point.

Very unfortunate ending in hindsight.


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Re: Making SEGA Genesis cartridges
« Reply #146 on: November 22, 2022, 12:04:34 am »
It was an astute person who penned the "Graveyard of Empires" moniker.

Crazy how many of those games I have never heard of.

But those Blockbuster labels bring back some memories!
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #147 on: February 01, 2023, 12:50:20 am »
What a difference two months makes…

So, every morning I wake up and slam three heaping tablespoons of this now.  I like to use a brewery glass because it helps me pretend I’m fun.



The good news is I’m not dying of colon cancer.  Frankly that’s surprising news as the symptoms and family history weren’t great.  Those of you unfortunate enough to receive texts from me have heard all about this already but 2022 was a damned spooky year. 

Also, do not eat jerky labelled INFERNO from a man with a tattoo on his ass of the grim reaper eating a Carolina reaper pepper.  I thought I was going to end up in the ER.  My specialist got a good laugh out of that anecdote.

But all that aside, I’ve truly felt the best lately that I have in months.  So that’s great.

Other big change was I couldn’t take the old gig anymore, tossed my resume out there, and was scooped quickly.  It’s fully remote, which is very weird, and I’ve lost access to that sweet, sweet color laser printer I pulled out of a junk pile at the last job.

Okay, here we go.  I got some HP inkjet with “unlimited automatic ink refills” for 15 months for $75 all in.  The ink smudges if it gets damp, as can be seen on my text on this label where I licked my thumb and rubbed my sizing notes to simulate spilling beer on a game at 2am.  So I broke out some duck tape and water based acrylic clearcoat.  I haven’t yet resigned myself to sanding mailing labels, so I got a leathery texture.  I gave them four coats.



This forum chews posts so I’ll respond to myself to continue…






pbj

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Re: Making SEGA Genesis cartridges
« Reply #148 on: February 01, 2023, 01:04:02 am »
So, I sorted my rather large box of old pcbs into SEGA and everything else.  I’m actually very low on non-saving Genesis games, but I do have a few of these cartridges that split roms in half onto smaller chips to save money manufacturing.



That one on the right was formerly Joe Montana Sports Talk Football, a 1MB game split onto two 512kB chips,

I thought I would get away with just removing the bottom chip and putting Last Battle (512kB chip) on there.

Thus far I cannot get it to boot.



I subsequently pried off the mapper chip and the top rom.  They came off completely clean and left clear holes.  I’m starting to wonder about all that time I spent hunched over smoldering hog lard.

Anyway, no change.  I suspect one of the ROM lines is routed weird… like chip enable or something.  Two hours (and counting!)  spent on this in order to save $2 on a repro board.  No regrets.  I’ll chunk it in my “remove this eprom some day” pile.

But I did get Mystic Defender and Twinkle Tale going.  The price of a legit Twinkle Tale will curl your toes ($400ish).  I actually owned Mystic Defender back in the day.  The only person that did.  Level 4 is ---fracking--- impossible.  It’s so hard the attract mode is literally showing you how to beat it.  Still impossible.  I cannot crack this game even with Game Genie codes as they don’t work on the lava in level 4.  I spent a long time in code generator generator mode in the Fusion emulator and couldn’t come up with anything that worked.  Fun graphics glitches, tho!



Anyway, more to come….


 :cheers:


« Last Edit: February 01, 2023, 01:28:22 am by pbj »

bobbyb13

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Re: Making SEGA Genesis cartridges
« Reply #149 on: February 01, 2023, 04:42:22 am »
Great posts these last few.
Sounds like excellent news actually- and that is a great pint glass.
Good on you flushing the system.

The Mystic Defender blurb made me chuckle out loud, which I needed, so thank you!
 :cheers:
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #150 on: February 01, 2023, 03:48:15 pm »
Paradoxically, the problem was the opposite of "unable to flush the system."  Anyway, I have some terrifying pictures I'll be happy to send you.  There will be blood.

 :lol

That experience with that SEGA PCB prompted me to check the box of sports games PCBs I've been holding onto for reasons unknown to me.  I found some interesting things out.

EA PCBs assembled in Puerto Rico in 1993 - ROM pops right off.  Any other PCB?  ROM or PCB cracks in half before the solder will give.  I spent 3 hours trying to desolder a chip and clean the holes on an EA PCB once.  Oh well, live and learn.  Seems to be total ---steaming pile of meadow muffin--- like FIFA soccer and international tennis.  Any other era the chips may as well be welded on.  On the pic below you may notice a damaged trace.... there is literally a damn factory jumper wire going off the ROM leg to enable 2MB mode.  I had a few with a slight variation that didn't need this jumper wire.  This was clearly done by hand and the ROMs are crooked because the chip sits on top of the wire.  You can also see the bottom left leg on chip U3 has been physically bent out and soldered to that capacitor.  Fun times.  What the hell was EA doing in Puerto Rico.... I'm sure it was a tax scheme.

Anyway, NFL Quarterback Club by Acclaim?  Even easier to pop off.

Tengen boards pop off pretty easily but the solder pads are delicate and I've had to scrap off some solder mask, fold the eprom leg over, solder to the trace, etc.  No big deal.

Here's a couple of examples.





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Re: Making SEGA Genesis cartridges
« Reply #151 on: February 01, 2023, 07:15:11 pm »
So the issue with that board was indeed the vE pin.  And then the 2MB connection was pulled high to 5V.  I depopulated another one of these boards to follow the traces so I wouldn’t have jumpers on the edge connector.

And now I have two copies of Last Battle….


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Re: Making SEGA Genesis cartridges
« Reply #152 on: February 02, 2023, 08:06:38 am »
I just found a rare Japanese Genesis game, that I became Addicted to.
A little known title called:  16 Ton.
I believe it was released on the Japanese Sega Satellite based internet server / Service.

 It doesnt look that visually impressive, but the gameplay is fun as Hell.
Its somewhat similar to Teddy Boy Blues.. but its gameplay is much more fun and dynamic.

1) You can Run,  Jump,  and  Shoot    these 16 Ton Weights.
2) The weights can Crush the enemies
3) The weights have PHYSICS !!!   You can make them bounce off of walls,  each other,  they can slide on Ice..etc.
4) The weights can fall, bounce, or slide into you..  so you have to be quite careful about them...
5) You jump on the stopped weights, to reach higher platforms.
6) After a few jumps on a stopped weight, they will start to break apart, and eventually will vanish.
7) Weights can form a protective wall against enemies
8 ) Enemies can cut through the blocks, with some effort / time
 A) One particular enemy, tends to be able to Jump down from the platforms above you
 B) One enemy can Fly (and can destroy any stopped weights that its blades hit)

- At the top of the screen, is a long section of Bars.  This has dual functionality...

 A) It will suddenly start to scroll from left to right... like a slot machine.  When it stops, it will Drop a random
number of enemies at that horizontal screen location.

 B) The bar will then act as a time... slowly counting down, until the next batch of Enemies to Release.
 C) The bar will stop counting down, if there once you are on your last batch.  You will have to then hunt down these remaining enemies, for you to win.. and progress to the next level.

- At the Bottom of your screen are:

1) Enemy - The number of enemies left alive... in the current Level
2) 16 Ton - I havent figured this meter out. I think its a limiter on how many Weights you can shoot
3) Slots    - This is the number of remaining "Enemy Drops"
4) Lives    - Number of Lives you have left

- I believe you have a certain number of  "Continues"  as I know Ive blown through all 5 men, and was able to keep going.  Eventually Id run out, and Id get a permanent "Game Over", and have to start from the beginning level again.  I never counted how many lives total.. as I was too busy having fun playing.  I must have sunk about 2hrs into the game, without even thinking about it.

- All levels Wrap around from left to right, and top to bottom (infinitely).
- There are certain levels that have Unique blocks:

A) Ice Blocks - very slippery. Good to be able to slide weights into the enemies.
B) Destructible blocks - Weights thrown into them, can destroy them
C) Bouncing Blocks - Jumping on these will make you bounce. Weights can also bounce on them.

- The Physics are quite amazing.  Not only can you do jumps that are short or long.. but you can also add your momentum to throw the weights shorter.. or further.   The weights bouncing and sliding, is also great.. and you often end up Crushing yourself, while trying to crush the Enemies.

 This really is a Must play.  Hilarious fun, challenging, and very addictive.


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Re: Making SEGA Genesis cartridges
« Reply #153 on: February 02, 2023, 09:34:35 am »
I had found  16 Ton,  when thinking about a list of some of the best games for the Genesis.


These are some of my top re-playable Favorites:
(In no particular order)

16 Tons

 -New personal Favorite.  Very Addictive Arcade Action Game.

Super Hangon:

 - One of the systems fastest & more intense racing games.  If you play the "Story mode", you can unlock a much
higher top speed bike.  Faster than the "Arcade" mode bike, from what I recall.  The story
mode bike starts out slow, and pathetic.. but eventually things get faster and more intense.  Its a very intense challenge,
to be able to compete a race without crashing.. as crashes will cause you to waste your upgrade money.. on repairs.

Rocket Knight Adventures

 - This game is very Polished.  It controls and plays smooth.  The graphics are cool.  The Music and SFX are Fantastic.
And the kinds of interactions and graphical effects are varied and unique.   The game starts out seeming "Easy",  but
ohh boy.. does it ever ramp up in difficulty.  Its one of the very few games that I was unable to defeat.. (I was close)

The Revenge of Shinobi

 - My favorite Shinobi game, after the Arcade Original.  The guy moves a bit slow for my taste, but the challenge is
decent... and the tunes and overall Feel, is quite Epic.

Zany Golf

 - Im a Sucker for a good Mini Golf game..  and this one, is one of the most unique and fun versions, that Ive ever
come across.  Everything from working Pinball Flippers,  to Lasers,  Fans that push the ball, and many other
interesting and unique features and functions.   Its a very challenging game to fully beat.  Always fun for a replay.

Thunderforce II

 - Hands down, my Favorite shooter of all time.  I prefer this over all of the others in the Series.  Why?  This version has
FAR superior music (best VG music Ive ever heard), much more detailed hi-res graphics, and the powerup system is much
better than the later versions.   Its also FAR more challenging than TF3.. yet far less rage inducing than TF4.

 Some people do not care for the Top View stages.  They are a little awkward, but they give some nice variation to the game.
The main issue with them, is in getting Lost, while trying to find each base.

 The other issue I originally had.. was due to not reading the manual.  You see, every other weapon you collect.. shoots in the air...
but, in order to hit the targets on the ground, you need to use your "Bombs".   The bombs are Automatically dropped.. but they
visually look like they are just standard air based weapons.  As such, you have to realize that in order to hit these ground targets..
you have to get quite Close in range, for your bombs to be able to reach them.  You can see where they are landing, by looking
at the small circles that form.

 You can skip most of these stages at the Main Title screen, by activating the hidden menu.  At title screen, press A+B+C+Start Button.
From there, you can adjust the difficulty level, and starting level.   Beware.. as if you chose to lower the difficulty.. the game wont
allow you to complete the entire game (It will stop you, a few levels before that point).  This really forces you to develop your skills.

 The best thing about it, is that its difficulty level is very Fair.  It will allow you to crash... and still keep traveling forwards.. unlike some
brutal shooters, that put you very far backwards into a level.  Furthermore, even with your Default weapon, you will have more than
enough firepower to fight the enemies.  Unlike shooters like R-Type... where if you are killed deep into the game, its almost easier to
reset the entire game... rather than trying to fight with your basic underpowered Pea-Shooter of a weapon.

 This game took me about a year of Off and On play,  but I eventually defeated it.  I was quite young at that time, so my skills were
probably nowhere near what they are these days.  That said, TF2 is one of those games that if you have not played it in years... its
probably going to kick your a**,  until get used to it again.   This is one of the few shooters that I re-play over and over again.

 When I defeated it, it was from starting on the 5th level, I believe.  That in itself was a real challenge. However, one day I want
to try to defeat it from stage 1.

 There is a somewhat superior version of TF2, on the  Japanese  x68000  PC.  It has more layers of parallax scrolling.  More details.
More levels in total.  Clearer voices.  And more.   Its interesting, that the Genesis version tweaked on the bosses to make it
MUCH harder than the x68000 version.  In fact, it was that tweaked boss, that caused me so much difficulty in reaching the final stage.
I sort of had to cheat, by rapidly toggling the start button.. acting as a Pause.. to simulate slow-motion.  Even that, was still a real
challenge and miracle, to pull off.  That said, it was worth every second of pain.  Its just a fantastic experience, in total.

Target Earth

 - This is another very EPIC game.  Maybe not as perfectly balanced as TF2.. as its a bit slower in pace..  but it has so many unique
things within its gameplay.  Many of the stage missions, have different objectives.  In one mission, you had to help defend the main
ship.. while waiting for as many of your friends to board it,  to escape the planet.  However... I found out the hard way.. that if you
do not board within the said time limit (they warned me),  then they will actually close the hatch, and leave you stranded!  Then you
get the "Game OVER" screen.. no matter how many lives / continues that you had!  I was gobsmacked!  Had to laugh at myself,
as they did warn me.

 The game has a unique system of aim control.. but its jumping has a small Delay to it, that takes some time to get used to.
This is semi-realistic, because anything that Heavy.. isnt going to be quick nor easy to "Jump" into the air.  As such, you eventually
get used to pre-planning your jumps a hair early... or at least, expect a little delay after you press jump.

 The game is BRUTALLY hard.  I think it took me several hours of play to figure out how to defeat the first level.  One of the
keys, is trying to run past enemies, rather than trying to fight them all.  If you keep from getting too many hits, eventually your
health bar will auto re-fill itself.   Sometimes you can "Rest" to recoop your energy.. but there are missions in which you do
not have any extra time to waste.

 At the end of each stage, there is the Opportunity to Earn extra weapons.  This depends on how well you performed in the mission
that you just completed.  For example.. if you rescued 98% of the crew on that one stage, you might earn 2 weapons, rather than 1
or none.  It becomes fun trying to get as much of a bonus as possible, to be able to get the best possible weapons, as early as
possible.

 The soundtrack is a little limited in the number of tracks.. but they are fantastic tracks.  One of them sounds like a crazy futuristic
Electrified Jazzy Guitar solo... and its to die for.

 There is an actual story that gets told to you, as you progress.  Its not some deep RPG thing.. and its not some long disruptive
amount of text to read.  Its just enough to be interesting.. and eventually "Shocking" when its revealed to you, what "happened",
and Why.

 One great thing about this game, is some of the depth of Realisms in it.  For example... if you launch an Explosive shell into the air,
and then charge into the resulting Explosion.. you WILL take massive damages from it.

 The delay in the jumping is also one of those details of Realism.  It helps to really pull you into this world / game.
There are other things... such as using the Atmosphere (burning them up as you Juke them) as means of killing the enemies.

 The graphics are very cool looking, and are quite detailed.  Things only get more and more impressive, in the final stages.

 There is also an EPIC mini-movie, that eventually plays... if you do not press anything at the title screen.
It tells a little bit of the story, with some very cool battle animations.

 Recently, some company made a modern re-make of this game... however.. IMO, its complete Trash, compared to the original.
It was clearly made up people whom are not actual Artists..  as there are many glaring visual issues, such as very bad looking
explosions and effects.

Ghouls and Ghosts

 - What can I say.  This is a game that anyone can pick up and re-play, over and over again.  Its just a very fun and addictive
game.   And while you can play the arcade game on mame..  the Genesis version holds it own, quite well enough, to satisfy.

Strider

 - While this game is a little lacking in terms of depth of gameplay... it was one of the few games that had a sort of epic mission
feel to it.  Seeing the character running down the steep snowy mountain.. its captures the spirit of emotion so perfectly... and
burns it into your very soul, forever.   The game is very Interactive.. in ways that many games are not.   Its not so much of a
re-play game... as it is a kind of special feat, of a very polished Genesis game experience.

Castle of Illusions

 - Another very polished game.  Starts out seemingly childish.. but then becomes quite deceptively challenging.  This is one
that had some very beautiful and creative visuals... and a great matching soundtrack + sfx to boot.  Just getting to see
the sparkling spider web stage, or roaming in the Candy-Land... is just an amazing experience to behold.  Few side-scollers
are anywhere near as pretty, and unique, as this one was.

Batman (Sunsoft)

 - Its been a very long time since Ive played this one, so my memory is fuzzy... but from what I recall... I really enjoyed this
one.  It played well, and really set the mood.  The only bad part about it, was it was too darn short.

Zhuo Gui Da Shi (Ghost Hunter)

 - This is a fun little Pang Clone, that has a Monster Theme to it.  Its quite challenging and addictive.
It might not be super unique, but its fun to fire up and blast through as many levels as you can.


 Personally, after playing the EPIC original  "Phantasy Star"  on the Sega Master System... I HATED Phantasy Star 3.
In comparison, it was very boring.  I was also extremely disappointed, that they removed the 3d Dungeons. If anything
I expected that there would be even greater 3d detailed dungeons.  Instead, we got these dumb, ugly, overhead puzzles.

 The original Phantasy Star  outshined PS3 in every single way.  Especially in the Creativity of the Story.  You also
connected far more emotionally, to the Characters.  While mapping those Dungeons out by hand was a pain.. it was
also such a memorable experience.  A real mystery, and psychotic + stressful level Challenge.  Especially since you
were not able to SAVE your game, when in any Dungeon.  I swear I recall being stuck in a Dungeon for like +5hrs...
and unfortunately, not being able to survive.

 They dont seem to make games like that anymore.  These days, they are way too easy, and treat you like you have
a mental handicap.. telling you exactly what buttons to press, and when to press them.  I cant Stand that BS.


 Anyways...  I looked at the list of growing Megadrive roms, and realized that there are so many that Id never seen before.
Lots of interesting Prototypes that have been popping into Mame.  Going to have to check some of them out.  Figured Id share
one of my recent findings, and favs.

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Re: Making SEGA Genesis cartridges
« Reply #154 on: February 02, 2023, 06:01:53 pm »
Very good suggestions, Xiaou2.  I wasn't familiar with Ghost Hunter or 16 Tons.  I think I'll have to make a copy of Ghost Hunter.  May need to revisit Batman.

I'm a big fan of Target Earth.  An almost cinematic game.  Only copy I saw back in the day was the one I owned.  The music is incredible put through some decent speakers.  I just cheat and do the invincibility trick but it's still a fun ride.

I do have a homemade Revenge of Shinobi 1.0 with Sonny Chiba, Godzilla, Batman, Spider-Man, etc. 

Thunderforce 3 I actually own legit.  Someone was selling two loose PCBs on Ebay and I got them for $10 shipped.  I was reasonably sure they were Altered Beast and Thunderforce 3 and turned out to be right.  Who in the world strips a Thunderforce 3 for its shell?  Probably worth $20 with my repro label.  Only other "seller didn't know what he had" story is finding an Ultimate Qix in the bottom of a box of sports games.

I'm not convinced this is ever coming out, and I'm of the opinion that the original port doesn't really need updating, but there is a guy working on an enhanced Ghouls N Ghosts:

https://www.youtube.com/@amaru1818

And check out Tanzer and Xenocrisis if you haven't already.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #155 on: February 02, 2023, 06:41:11 pm »
That Ghouls N Ghosts hack is pretty impressive. Looks better than the CPS version in a lot of ways.

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Re: Making SEGA Genesis cartridges
« Reply #156 on: February 03, 2023, 05:03:03 am »
Very good suggestions, Xiaou2.  I wasn't familiar with Ghost Hunter or 16 Tons.  I think I'll have to make a copy of Ghost Hunter.  May need to revisit Batman.

I'm a big fan of Target Earth.  An almost cinematic game.  Only copy I saw back in the day was the one I owned.  The music is incredible put through some decent speakers.  I just cheat and do the invincibility trick but it's still a fun ride.

I do have a homemade Revenge of Shinobi 1.0 with Sonny Chiba, Godzilla, Batman, Spider-Man, etc. 

Thunderforce 3 I actually own legit.  Someone was selling two loose PCBs on Ebay and I got them for $10 shipped.  I was reasonably sure they were Altered Beast and Thunderforce 3 and turned out to be right.  Who in the world strips a Thunderforce 3 for its shell?  Probably worth $20 with my repro label.  Only other "seller didn't know what he had" story is finding an Ultimate Qix in the bottom of a box of sports games.

I'm not convinced this is ever coming out, and I'm of the opinion that the original port doesn't really need updating, but there is a guy working on an enhanced Ghouls N Ghosts:

https://www.youtube.com/@amaru1818

And check out Tanzer and Xenocrisis if you haven't already.

 :cheers:

Thanks PBJ.

 I actually owned Mystic Warrior as well.  I do recall defeating it.. but I dont remember much more than that.  It wasnt all that graphically impressive,
but the mixed magic rings? thing was an interesting game mechanic.

 For some reason, I remember owning the version of Revenge of Shinobi, with the Spider Man boss, and the others.

 Way back then, I was foolishly dumping most all of my "Dishwasher" earnings, into SMS and Genesis games.  Eventually I had amassed about 51 games
in total.  I was so desperate for new games, that I found adds in magazines about Japanese imports.. and I blindly ordered some Japanese carts,
well before they would end up coming to the US (and some that never made it here).

 I believe I had bought Thunderforce III, Outrun, Verytex, Gaiares, MUSHA, and Hellfire, in Japanese Import carts.   I wasnt very impressed with a lot of these purchases,
so eventually stopped blind-buying these $80 import games.

   Verytex was the worst of them all.  It felt like a poor attempt from a high school student.  It was playable, but boring and short, if memory serves right.
Eventually all of these games except Verytex were sold in the US.   That said, the worst game Id ever purchased for the system, was Technocop. I have
no idea how that game approved to be sold.  It single-handedly made me re-evaluate my choice in wasting money on a collection of so many Bad games,
that Id never re-play.

 When I was like 17, I had read in EGM that you could make a custom RGB cable for the Genesis, if you had an RGB monitor.  At that time, I had an
Amiga PC + 1024? stereo RGB monitor.  I found an add in a magazine for a company that made Custom cables.  I think it was called Redmond cables.
I have no idea how I remember that.   Originally they messed up the first cable, with the wrong connector types.  The next version worked spot on.

 I was torn about it, however.  Certain games like R.O.Shinobi, had areas where once-shimmering details would be rock solid and clear.
However, in many cases, it made the games look worse.  More jagged, and less shaded.  As such, I mostly used the composite output instead.


 I remember years later deciding to try to sell my 51 Genesis carts to a re-seller, thinking Id be getting well over $1000.. so I could buy a PS1.  lol
I think he offered me less than $200.  I nearly cried... but foolishly, I took the money.

 The sad thing was that I only bought like 5 games for the PS1.  I only really bought it for Ridge Racer.  The rest of the library was mostly awful, low-res,
3d trash.  Rayman was the next best game... Loved that game.  So darn pretty.. and so very challenging.


 That GnG port looks pretty sick,  thanks for the link.
 Ive seen an Arcade Shinobi port being started... and it looks amazing also.

 That said, Id love to see people adding more to these games, rather than just a straight port.


 If my life doesnt completely down the toilet (its not looking good), Ive dreamed about making a custom controller
specifically for  Target Earth.

 A large counter-weighted lever, that you strapped yourself into.  You could then Jump with your own legs,  for the jump button...
and the counterweight would allow for some excellent floating "hang-time".

 Maybe add an actual Gun that has powerful recoil effects built into it.

 Someone good at hacking into these games, could make a system to activate certain effects, based on the levels / guns used.
Maybe even power the jumping mechanism, with a precision motor system (that could reduce the height requirements, now that
I think about it).

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Re: Making SEGA Genesis cartridges
« Reply #157 on: February 03, 2023, 11:06:49 pm »
Well, Xiaou2, you’ve either been a bad or good influence but you were an influence today.



I finally tallied up my collection.  Putting aside my cardboard box of donor games, I’m up to almost 200 unique games.  It’s been a fun ride.  It started when malenko sent me a Genesis 2 and MK2.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #158 on: March 01, 2023, 04:24:31 pm »
Wanted to give an overdue shout out to Mike_A and his incredible Genesis cartridge storage boxes.



Through the use of removable inserts, each column in each crate can hold either EA or Genesis cartridges.  They also stack very nicely.  I was able to get my entire collection of unique games into this with room to spare for, eh... a few more.  Each comfortably holds 63 of either type.  He previously made a prototype I'm using to hold my leftover donors.  All the loose PCBs have been sorted into all those wooden cassette racks I don't need for at least 1-2 weeks.

In other news, I was quietly given some PCB plans for a reproduction board that will supposedly allow a 4MB rom to save to FeRAM.  It uses a 74LS74A flip flop and a 74LS139 2x4 decoder.  I'm pretending I know what those words mean.  I went through many, many PCBs and only found those chips on EA College Football and EA NHLPA93, which are both fairly early EA sports games.  So I went ahead and ordered some more from China.  74LS138N and 74HC00N were on tons of Sega / EA / Akklaim boards but I'm too dumb to look at the datasheets and figure out if they're compatible.  I'll make one cartridge with sockets and see what works, I suppose.  The weird FeRAM chip that literally only Sonic 3 used has also been ordered in bulk.

So, anyway, in theory this should enable me to play the 4MB homebrew that saves such as Cave Story, Sonic Hellfire Saga, Life on Mars, etc.  Those all work fine on $18-25 flashcards but reason left this conversation many, many months ago.

PCB Way is going to send me a run of 10 boards and we will see what happens in a few weeks.


 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #159 on: March 01, 2023, 05:42:25 pm »
Do it for the love!

Man, those boxes are beautiful work too.
Mike hit it out of the park with those.
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #160 on: March 01, 2023, 09:01:40 pm »
Thanks for the love.

They do look pretty sweet.

I am really happy with the way they came out.

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Re: Making SEGA Genesis cartridges
« Reply #161 on: March 01, 2023, 10:04:34 pm »
Good stuff!!

The homebrew carts are my favorite.

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Re: Making SEGA Genesis cartridges
« Reply #162 on: March 01, 2023, 11:30:08 pm »
In other news, I was quietly given some PCB plans for a reproduction board that will supposedly allow a 4MB rom to save to FeRAM.  It uses a 74LS74A flip flop and a 74LS139 2x4 decoder.  I'm pretending I know what those words mean.  I went through many, many PCBs and only found those chips on EA College Football and EA NHLPA93, which are both fairly early EA sports games.  So I went ahead and ordered some more from China.  74LS138N and 74HC00N were on tons of Sega / EA / Akklaim boards but I'm too dumb to look at the datasheets and figure out if they're compatible.  I'll make one cartridge with sockets and see what works, I suppose.  The weird FeRAM chip that literally only Sonic 3 used has also been ordered in bulk.
74LS74A flip flop - A flip-flop is a circuit that comes with two stable states and is usually used to store binary data.  It works a bit like a push-on/push-off power switch where you can set/reset the current state to on or off as needed.

74LS139 2x4 decoder - When the Enable pin is at logic low, the chip uses 2 inputs (A and B) to select which one of four outputs to set to logic low.  (Y0-Y3) The chip contains two of these 2x4 decoders.

74LS138N 3x8 decoder - When the Enable pin is at logic low, the chip uses 3 inputs (A, B, and C) to select which one of the eight outputs to set to logic low.  (Y0-Y7)

74HC00N Quadruple 2-Input NAND Gates - This chip has four negated logic AND gates. If both inputs to the AND gate are logic high, the output is logic low.  If either or both input are logic low, the output is logic high.

None of these four chips have the same function or pinout.


Scott

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Re: Making SEGA Genesis cartridges
« Reply #163 on: March 22, 2023, 09:40:55 am »
So, I got my PCBs and components in and made a tester board. 



Learn from me - don't use machine pin sockets for 30 year old recycled EPROMs.  I've subsequently ordered a ZIF socket I'm going to stack on top of it.

You can also see my high tech "edge beveling machine" in the background which consists of dragging the edge of the cartridge at an angle on sandpaper.  This is to make insertion easier and less likely to damage your console.

Anyway, I've got Cave Story booting and playing on a dedicated cart for the first time ever.  It's not saving, nor is it displaying the save game icon (hovering floppy disk), which I find very odd.  I guess there's some mechanism by which it detects your ability to save.  Buried deep on the Cage Story megadrive port website, he mentions that it uses 8kB saves but that he's modded the header to say 32kB to increase compatibility with flash carts.  Well, I had, of course, ordered 8kB FeRAM 1608 chips like what I thought was used on Sonic 3.  Modifying the header back to say 8kB saves didn't change anything.  So I busted out another $20 and ordered a stack of 1808 chips.   We shall see.

This PCB was designed on a French forum and they have the Megadrive section walled off.  I've registered and begged for access but so far no dice.  I'm hopeful that with an 1808 FeRAM chip that this board suddenly becomes compatible with SGDK designed games.  What is of slight interest is that the board supports a 4MB rom and saving games.  SEGA never accomplished this in the 90s.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #164 on: March 22, 2023, 09:55:55 am »
Quote
This PCB was designed on a French forum and they have the Megadrive section walled off.  I've registered and begged for access but so far no dice.

So what did you do to piss them off?

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Re: Making SEGA Genesis cartridges
« Reply #165 on: March 22, 2023, 10:24:28 am »
Turns out I have to make "10 quality posts" before I can get into that section.


 :banghead:

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Re: Making SEGA Genesis cartridges
« Reply #166 on: March 22, 2023, 10:45:09 am »
You're ---fouled up beyond all recognition---.

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Re: Making SEGA Genesis cartridges
« Reply #167 on: March 22, 2023, 11:08:06 am »
You're ---fouled up beyond all recognition---.

My joke, except repeated.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #168 on: March 22, 2023, 11:37:57 am »
You can always try posting "Macron is a fascist ---uvula---!" on there somewhere 10 times and see if that works.

Of course you'll need to post that in French I imagine.

You're ---fouled up beyond all recognition---.

My joke, except repeated.

 :cheers:
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #169 on: March 27, 2023, 11:45:11 pm »
Decided life is too short so I’ve been using the Game Genie.  Batman is indeed a very good game, so good tip there.

I finally beat Mystic Defender level 4…. Because I just haaaaaaad to have the “uncensored version” it meant I was very limited on known game genie codes.  You could have near invincibility or unlimited lives but not both (lives takes all five lines on the genie).  Invincibility meant you don’t bounce back when you touch an enemy.  You fall down a pit?  Dead.  That infinite lives code?  9 lives becomes 8 when you fall down a pit.  Lava is treated like a bottomless pit.

So, with invincibility, I was able to make the jumps without having to worry about dodging enemies,  Still barely pulled it off.



Other than that level and the final boss, it’s really not that difficult a game.  Whenever I showed off my region switch on the genesis, this was my go to example.





https://tcrf.net/Mystic_Defender



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Re: Making SEGA Genesis cartridges
« Reply #170 on: May 01, 2023, 07:07:38 pm »
So, here's a BYOAC World Exclusive.   ::)



I've been badgering the Red Miso team for months and finally got one of their programmers to indulge me.  We went through..... many.... ROM revisions, but now we've got Sonic Hellfire Saga booting and saving on original hardware.  Every EPROM I own is currently being rotated through my Easy UV Bake oven this evening.

Sadly it's not saving on my French Ultimate Console boards, but it works perfectly on my arch nemesis the World Series Baseball 96 PCBs. 

So if you want to find out how much I love you, ask me to make you one. 

 :lol

They should be releasing the new version soon.  There's some bug fixes bundled into it, too.

 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #171 on: May 01, 2023, 07:58:40 pm »
So if you want to find out how much I love you, ask me to make you one. 
I cant wait till it shows up in the mail, and I love you too.
If you're replying to a troll you are part of the problem.
I also need to follow this advice. Ignore or report, don't reply.

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Re: Making SEGA Genesis cartridges
« Reply #172 on: May 06, 2023, 10:49:05 pm »
So, I just spent a… lot… on World Series boards and it turned out the issue with my Ultimate Console PCBs was a lack of a reset line to the 74LS74 chip.

Still working with the Hellfire people to get it saving on these French boards but now I’ve got Sonic Complete and Cave Story saving correctly.


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Re: Making SEGA Genesis cartridges
« Reply #173 on: May 08, 2023, 11:05:28 pm »
So, I messaged the guy that designed the PCBs and he says he has a personal copy that’s correct and what’s posted wasn’t the latest revision.  I found it simultaneously funny and sad that nobody has noticed this mistake in 7 years.  Really drives home what a tiny niche I’m living in.

Anyway, he claims tying pin 1 of the 74LS74 to Vcc will also make it work, but that some games may require it be tied in to the VRES line found on B27 of the cartridge.  I’ve already damaged my cartridge slot with jumper wires on the edge connectors (one of my female pins is now a folded over scrap of capacitor leg), so I am really trying to avoid doing that more.  So I may revise the Gerber files to either add this line to the chip, or at least a decent solder pad for a jumper wire safely removed from the male edge connector.

That being said, there’s a million places to tap into Vcc, including pin 14 of the same 74LS74.  I’ve done that and tested Cave Story, a new Hellfire Saga revision, and Sonic Complete.  All three saving correctly.  The poor Hellfire saga programmer is learning that the true hellfire was all the UV light I erased those EPROMs over and over in again along the way.  They should be releasing what I like to call the “shut pbj the ---fudgesicle--- up” revision publicly soon.

What this means is that the… let’s call it… sure… $50.. yeah… just $50 I blew on more copies of World Series Baseball 95 and 96 this weekend wasn’t needed.  And I also don’t have to desolder 84 pins unless I really want to. 

But it also means I can make these from entirely new boards and components and no longer have to kill old games.

So here’s your first look at an entirely new (okay the eprom is 25 years old) Hellfire Saga.  This has been fun and I’ve come a long, long way…

 :cheers:






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Re: Making SEGA Genesis cartridges
« Reply #174 on: May 08, 2023, 11:46:50 pm »
100% awesome.

Makes me want to buy a Genesis and support your fledgling business.

How much ya gonna charge per cart to recoup development costs on your (ahem...) what, $100 now total in otherwise old neglected pcb carcasses?!
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #175 on: May 10, 2023, 06:34:22 pm »
He's in for way more than that, cause he spent more than I have and Ive spent a couple hundred.
If you're replying to a troll you are part of the problem.
I also need to follow this advice. Ignore or report, don't reply.

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Re: Making SEGA Genesis cartridges
« Reply #176 on: May 10, 2023, 11:30:55 pm »
I’m probably in two grand but I’ve been at this about 18 months.  EPROM prices have gone insane but I don’t think I’m quite ready for surface mount rom chips.  Give it six months and I’ll revisit that.

But cracking the issue with this Ultimate Console PCB has opened up a whole new world of modern homebrew games.  Hellfire Saga is actually quite good now that I’m allowing myself to play it beyond save testing.

Here’s Malenkos art package on regular paper tacked with a glue stick.  Photo paper and glossy labels coming soon.

 :cheers:




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Re: Making SEGA Genesis cartridges
« Reply #177 on: May 11, 2023, 02:37:06 am »
I figured you were into it for a few bucks.
This video game hobby thing is a slippery slope on all fronts.
It's alarming how much worse pinball is.  :lol
For a year and a half of product R&D that isn't that bad!

Love the story of this game coming together as it has.
Although we weren't playing it on a Sega system my son Tyler was already kicking ---my bottom--- at every Sonic game we had by the time he was 7.  Maybe even 6.
I haven't played any since as I've been distracted with these big ass wood boxes for so long now.

I wonder if he is even aware of the Hellfire Saga at this point.

Nice work gents.  That is some legit lookin stuff.
 :cheers:
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #178 on: May 12, 2023, 09:55:02 am »
Photo paper arrived, so I figured I'd share an old trick I like to call... uh.... how to get a 10.59" wide image printed onto letter paper.  Your printer can do it but it will gripe at you.

Create a document that's legal size.

Set your leading edge left margin to 0.2".  Ignore any and all warnings.  Insert your 10.59" image aligned to the left margin.

Cut a 3" wide strip of paper.  Overlapping as little as possible, tape it to the right edge of the page.  You've got very little margin for error here.




And here's more or less the final product.  Someone buy one, plz. 

« Last Edit: May 12, 2023, 05:22:04 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #179 on: May 12, 2023, 06:38:01 pm »
Love it.
I'll support this habit.
How much $$ do I send where/how?
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #180 on: May 14, 2023, 10:07:41 am »
You can’t get just one game.     :lol

Materials cost on this one… I’ll have to add that sad number up. 

Have you picked up a Genesis console yet?


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Re: Making SEGA Genesis cartridges
« Reply #181 on: May 14, 2023, 12:38:13 pm »
Agreed on games!
I need to pick up a console still.
I have seen a few second hand ones in stores here so it may not be so difficult to get a functional one.
Any recommendations on generation to shoot for?
I've noticed that the serial numbers begin with a letter.

I am nearly finished with a scart rgb modded Sony TV at this point but I don't know what video connection any particular Genesis uses- and what I find here may be a built for (not just in) Japan version.

How slippery the slope.

You can’t get just one game.     :lol

Materials cost on this one… I’ll have to add that sad number up. 

Have you picked up a Genesis console yet?
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #182 on: May 14, 2023, 10:03:34 pm »
Genesis 1 or 2.  Both output native RGB and you can get SCART cables.  Avoid Genesis 3.

They also make HDMI clones.   :dunno

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #183 on: May 16, 2023, 08:28:33 pm »
Took matters into my own hands with a cordless drill!  And now we’re running primo homebrew in EA shells.

 :lol



Ordered some more of these PCBs but went blue mask this time.



I’m low on SEGA shells, I’ve got plenty of EA.  I did the math.  SEGA carts running me about $8, EA about $7.  Haven’t gotten my hands on a big cart lot in awhile, so I may have to start ordering repro shells.   :-\




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Re: Making SEGA Genesis cartridges
« Reply #184 on: May 19, 2023, 10:23:50 am »
Guess who just bought a box full of complete copies of NFL 94 starring Joe Montana.   :-[

Losing access to the laser printer has kind of sucked.  I was getting very sharp and vivid labels.  The downside was the image was matte and if you peeled back and reapplied the sticker, the image was pretty much ruined.  I guess the inkjet stains the paper, so they're very tolerant of adjustments, but if you have a sweaty thumb or something you're going to smear the art.

So I've been playing around with AquaNet.  You can spray it indoors, it dries quickly, it adds a nice 70s vibe to your workbench.  Even with very misty, light coats, it causes the ink to bleed and soak into the paper a little bit.  Makes it surprisingly resistant to moisture, though.

Went back to Minwax Polycrylic polyurethane clear coat.  Two very light coats and you don't get any image changes, but now you've got a leathery texture.  Short of the back of the sticker getting soaked, moisture isn't going to do anything to the image.

Didn't photograph so well, but here's a side by side.



Clearcoat on the left labels, AquaNet on the right.  Spray painting mailing labels.  This is what my life has become.

 :cheers:

EDIT: Here's a better pic.  AquaNet on the left, clearcoat on the right.

« Last Edit: May 19, 2023, 10:33:52 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #185 on: May 19, 2023, 01:12:18 pm »


 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #186 on: May 20, 2023, 04:43:03 am »
Well ---steaming pile of meadow muffin----
I've used AquaNet to put bicycle handlebar grips on for decades.
Nice and slick when first shot, stupid sticky afterwards.
Funny because a brilliant half-mad and very lovable guy from NYC I was lucky to know taught me it's usefulness in that manner.
Also easy to experiment with as my mom had a pink can of that ---steaming pile of meadow muffin--- in the bathroom ever since I could remember.
Now I do too.  :)

NEVER would have considered its potential usefulness as an ink sealer.
Solvents are interesting things when aerated, and may be the differeence between the ink jet and laser prints actually.

I know from fiberglassing stuff that if you use oil based colors with styrene they bleed like f'n crazy.
All the paint used is water based so it isn't solublized with wet resin.

Curious to know how this works with your label testing.

And I still want to buy some carts.
 :cheers:
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #187 on: May 25, 2023, 10:17:11 pm »
I’ve been slowly reprinting all my AquaNet era labels and redoing them with clearcoat.  HP sent me a third cartridge.   :lol

Anyway, fixing to mess up Joe Montana….  Revised PCBs arrived from China.  Sonic blue this time.


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Re: Making SEGA Genesis cartridges
« Reply #188 on: May 26, 2023, 07:37:16 am »
Has someone designed a 3d printed shell?

I have a 3D printer that actually works.

I have no 3D design experience so I need a model, but I can hit the print button on my machine.

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Re: Making SEGA Genesis cartridges
« Reply #189 on: May 26, 2023, 11:44:32 am »
For storage there are these...

https://www.thingiverse.com/thing:766810

 :dunno

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Re: Making SEGA Genesis cartridges
« Reply #190 on: May 26, 2023, 05:31:50 pm »
One of the new boards populated.  These things take me almost an hour to assemble and test.

 :angry:





And here’s the “final product.”  Nearly $20 each in materials cost.   :embarassed:




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Re: Making SEGA Genesis cartridges
« Reply #191 on: May 27, 2023, 10:51:06 am »
Maybe you could try doing the ICs with solder paste (apply from a syringe) and hot air. Applying lines of solder paste along those rows of pins would be easy, and then you blast it with (temperature controlled) hot air. Takes a little practice to work out how much paste to put on etc., The solder naturally tends to clump onto the pins anyway. Easier than soldering each individual pin anyway.

I use a "JCD 858D", which is a clone of some other brand. It was cheap (like ~US$50-70 or so) but it works well, allowing you precise control of both temperature and fan speed. I use it for all my SMD stuff in particular, but keep finding more uses. Love it for heat shrink tubing, I cringe when I see people using cigarette lighters.

I just googled "??? 858D" and got clone hits on ebay for under $10! Not sure I'd trust them. Described as a "Hair Dryer Welding Tool". FFS, don't use these things to dry your hair! You'll have a bad-hair day.

https://www.ebay.com.au/itm/265812816698?chn=ps&_ul=AU&_trkparms=ispr%3D1&amdata=enc%3A1Y-f6aMXgQYOW1HBTRQKmgg65&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&mkscid=101&itemid=265812816698&targetid=1598469862718&device=c&mktype=pla&googleloc=1000286&poi=&campaignid=19657035767&mkgroupid=143201283022&rlsatarget=pla-1598469862718&abcId=9305369&merchantid=614912741&gclid=CjwKCAjw1MajBhAcEiwAagW9Ma-cOSS-FDzE67-t3I1K6-mbPjsbU1ZPDJ4anxE51SumG-CV98f0zhoCBocQAvD_BwE
Check out my completed projects!


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Re: Making SEGA Genesis cartridges
« Reply #192 on: May 29, 2023, 03:57:59 pm »
I have a ton of 32pin m27c400 chips is there anyway to use them instead of 40pin m27c400?

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Re: Making SEGA Genesis cartridges
« Reply #193 on: May 29, 2023, 06:47:01 pm »
Probably.  Do you have a datasheet?

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Re: Making SEGA Genesis cartridges
« Reply #194 on: May 29, 2023, 10:57:38 pm »










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Re: Making SEGA Genesis cartridges
« Reply #195 on: May 29, 2023, 11:32:23 pm »
Probably.  Do you have a datasheet?
No I don't.

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Re: Making SEGA Genesis cartridges
« Reply #196 on: May 30, 2023, 09:06:25 am »
I think I found it.  It looks like it would work but you'd have to make some kind of adapter to reroute the pins.  The 27C160s are about 75-80 cents each in bulk, so I'll let you make that determination as to "is it worth it."

 :lol




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Re: Making SEGA Genesis cartridges
« Reply #197 on: May 30, 2023, 09:20:29 am »
Off topic, but this is where I ramble anyway so I'll post it here. 

I got tired of fighting my Retro Duo, which is a clone NES/SNES.  When it works, it works, but I've had to open it and reinforce the PCBs, replace most of the internal wiring, reflow the power jack.  Just on and on.  Recently I was thinking, "remember when Zelda games were actually fun and you weren't boiling mushrooms and slugs all day?" and tried to play Link to the Past.

Well, $30 and 72 hours later, I had a Super Famicom in hand.  99% of my SNES gaming is off an Everdrive clone in a universal shell, so it didn't really matter to me.  However, I do have about six or so original games that I bought in the 90s and I like to play them occasionally.  I'm not really a fan of shell mods... this system made it a good 30 years before I got my hands on it, I'm not widening the cartridge slot.

Other option is to play the games as loose PCBs.  No.

Another option is an adapter.  They're $20 on Amazon but they're really meant to make Super Famicom games work on SNES for people too squeamish to snap off two hidden plastic pegs.  They'll work the other way, but you've got to chop up or remove the shell it's in.  Why they didn't make a universal design is beyond me.

Another option is to use a Game Genie I already had.  Again, you have to strip it loose or cut the shell to hell and back.  But I popped out the board and took a look at it.  Held it up to a Super Famicom shell.

$4.60 and 4 days later, some random crap game was delivered in a huge box on Memorial Day from Japan.

With enough cutting of the internals of the shell, using the soldering iron to burn away enough of the top to get the slot exposed... the damn thing actually fits.  (Again, why didn't they use a universal shell??)



Then it turns out the Revision 1 Game Genies do not work with hi-rom games.  Game will boot and immediately freeze.  The solution is to remove 6 470 Ohm resistors and replace them with 100 Ohm per some NESDEV thread.  I had 4 100 ohms, 1 120 ohm, and 3 of the 470s were twisted together in parallel to make ~150 ohms.  Close enough.





 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #198 on: May 30, 2023, 02:57:39 pm »
thats hilarious, i do the opposite... i use my game genie to plug in curved SFC games to my square ass console. i could mod it to take them, but i'm lazy

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Re: Making SEGA Genesis cartridges
« Reply #199 on: May 30, 2023, 05:29:14 pm »
I think I found it.  It looks like it would work but you'd have to make some kind of adapter to reroute the pins.  The 27C160s are about 75-80 cents each in bulk, so I'll let you make that determination as to "is it worth it."

 :lol


Thanks for the help, Yeah I believe it to be easier to just get the right ones. Do you have a suggestion on where to buy or is ebay the best option?

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Re: Making SEGA Genesis cartridges
« Reply #200 on: May 30, 2023, 06:26:48 pm »
thats hilarious, i do the opposite... i use my game genie to plug in curved SFC games to my square ass console. i could mod it to take them, but i'm lazy

It's literally snapping off two pegs on the inside of the cart slot.  I believe in you. 

My rational was $30 for Super Famicom, or $65 for SNES.  SNES Game Genie was bought in a ~$15 lot with the Genesis one I actually wanted.  I honestly didn't even know if it worked until yesterday.  Super Famicom uses a stupid center negative power supply, but it's a common plug size.  I just cracked open a 9V 1A power supply from the junk pile and reversed the polarity.  Already had the AV cable and controllers.  I don't know if it's awesome or sad that I have all the accessories for 30 year old consoles laying around and can buy loose consoles and be fine... but here I am.

Thanks for the help, Yeah I believe it to be easier to just get the right ones. Do you have a suggestion on where to buy or is ebay the best option?

Well, how many is a "ton?"  It might be fun to program a chip and run a bunch of jumper wires.... once.

I get my EPROMs off AliExpress.  Last order was ~$35 shipped for 50 x 2MB (27C160) that I received last week.  It's been a total crap shoot with the quality.  Latest batch was actually shipped in antistatic sleeves of 5 chips and they're very clean.  I've burned 2 and they're fine so far.  I've had other batches where they've been thrown haphazardly into a bubble mailer.  Others have been stacks of ten neatly shrink wrapped.  The poorly shipped batch was actually mostly fine once I patiently straightened the legs.  One of the nice looking batches was about 30% useless.  Just embrace that all of this is a waste of money.  Don't bother with buying smaller than 2MB EPROMs because it's just a matter of pulling 2 pins high if you're using a 40 pin PCB and they're all the same price.


 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #201 on: May 31, 2023, 06:10:34 pm »
I have a couple hundred probably. Yeah its a waste of money because i have a mega everdrive pro. But I like tinkering with stuff especially modding consoles and soldering etc. Keeps my soldering skills up to date. lol

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Re: Making SEGA Genesis cartridges
« Reply #202 on: May 31, 2023, 08:05:01 pm »
What's not to love about nostalgia hoarding that pays off?!  :applaud:
If I didn't have a workshop 100 meters from the house to hide ---steaming pile of meadow muffin--- in I would probably get kicked out by the missus.

thats hilarious, i do the opposite... i use my game genie to plug in curved SFC games to my square ass console. i could mod it to take them, but i'm lazy

It's literally snapping off two pegs on the inside of the cart slot.  I believe in you. 

My rational was $30 for Super Famicom, or $65 for SNES.  SNES Game Genie was bought in a ~$15 lot with the Genesis one I actually wanted.  I honestly didn't even know if it worked until yesterday.  Super Famicom uses a stupid center negative power supply, but it's a common plug size.  I just cracked open a 9V 1A power supply from the junk pile and reversed the polarity.  Already had the AV cable and controllers.  I don't know if it's awesome or sad that I have all the accessories for 30 year old consoles laying around and can buy loose consoles and be fine... but here I am.

Thanks for the help, Yeah I believe it to be easier to just get the right ones. Do you have a suggestion on where to buy or is ebay the best option?

Well, how many is a "ton?"  It might be fun to program a chip and run a bunch of jumper wires.... once.

I get my EPROMs off AliExpress.  Last order was ~$35 shipped for 50 x 2MB (27C160) that I received last week.  It's been a total crap shoot with the quality.  Latest batch was actually shipped in antistatic sleeves of 5 chips and they're very clean.  I've burned 2 and they're fine so far.  I've had other batches where they've been thrown haphazardly into a bubble mailer.  Others have been stacks of ten neatly shrink wrapped.  The poorly shipped batch was actually mostly fine once I patiently straightened the legs.  One of the nice looking batches was about 30% useless.  Just embrace that all of this is a waste of money.  Don't bother with buying smaller than 2MB EPROMs because it's just a matter of pulling 2 pins high if you're using a 40 pin PCB and they're all the same price.


 :cheers:
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

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Re: Making SEGA Genesis cartridges
« Reply #203 on: June 06, 2023, 11:34:02 pm »
I considered a pi and a Kade and chose otherwise.  We are into retro gaming because it is expensive and inconvenient.

 :lol
Could you highlight the areas you had to cut on the back? Or let me know if the circled areas I have are correct. Im trying this with madden 93 and just want to make sure im cutting the correct places?
« Last Edit: June 06, 2023, 11:41:49 pm by bulldawg »

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Re: Making SEGA Genesis cartridges
« Reply #204 on: June 07, 2023, 12:44:02 pm »
Your circles look correct.  I really, really suggest you try desoldering the Madden ROM before you spend too much time on that PCB.  It was taking me literally hours to pull parts off of them versus entirely stripping a SEGA PCB within 5 minutes.  If you come up with a quicker method for the EA boards, I would love to hear it.

 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #205 on: June 07, 2023, 05:42:22 pm »
I already got the chip removed and installed a socket. Verified it still works with original chip (madden 93). I ending buying about 10 ea sports games because they were cheap. Took me about 30 mins. to desolder original chip and install socket. I used this desoldering iron in the pic and go through all the pins and the pins that didn't come clean the first go round (about 6 pins) I resoldered them with flux and got them clean the second time.

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Re: Making SEGA Genesis cartridges
« Reply #206 on: June 08, 2023, 09:09:02 pm »
Actually I was wrong I haven't opened madden 93 yet, It was nhl 93 and its 40 pins. The board layout looked the same at first glance. Now have to figure out how to mod this pcb.

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Re: Making SEGA Genesis cartridges
« Reply #207 on: June 09, 2023, 07:12:29 am »
Now there are two of you.

I love it.

Keep posting.

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Re: Making SEGA Genesis cartridges
« Reply #208 on: June 09, 2023, 06:27:47 pm »
Actually I was wrong I haven't opened madden 93 yet, It was nhl 93 and its 40 pins. The board layout looked the same at first glance. Now have to figure out how to mod this pcb.

I'm curious.  Are you in a 220V country?  I've looked at that type of iron and heard they don't work as well on 110V.  Should have just gone ahead and bought one, would have saved me a ton of time apparently.  I think I've mentioned previously that there was one era of EA cartridges manufactured in Puerto Rico that had really soft solder.  So soft you can just pull the chips off with a flathead screwdriver.  Other people have told me that they have no problem whatever with EA cartridges, so I'm still not sure what to make of it.  I can desolder SEGA PCBs so cleanly that the chips fall off with gravity.

 :dunno

For the 40 pin PCBs, just burn a 512Kb game, bend up legs 1 and 42, and then tie those two legs to 5V.  I don't recommend running jumper wires to the cartridge edge connector.  I did it and screwed up my female connector on my Genesis motherboard.  That was before I was using Kynar wire, though.

Anyway, Malenko and I have made an enormous library of Genesis cartridge labels suitable for printing.  It's his google drive so his call if he wants to post it publicly.

 :cheers:


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Re: Making SEGA Genesis cartridges
« Reply #209 on: June 09, 2023, 06:32:37 pm »
Anyway, Malenko and I (mostly Malenko) have made an enormous library of Genesis cartridge labels suitable for printing.  It's his google drive so his call if he wants to post it publicly.
FTFY
https://drive.google.com/drive/folders/1tVZb-Crq0XpU-4xo4HXjcYyn5VgqTLa-?usp=sharing

they arent perfect, some are super custom.
If you're replying to a troll you are part of the problem.
I also need to follow this advice. Ignore or report, don't reply.

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Re: Making SEGA Genesis cartridges
« Reply #210 on: June 10, 2023, 12:03:38 am »
Actually I was wrong I haven't opened madden 93 yet, It was nhl 93 and its 40 pins. The board layout looked the same at first glance. Now have to figure out how to mod this pcb.

I'm curious.  Are you in a 220V country?  I've looked at that type of iron and heard they don't work as well on 110V.  Should have just gone ahead and bought one, would have saved me a ton of time apparently.  I think I've mentioned previously that there was one era of EA cartridges manufactured in Puerto Rico that had really soft solder.  So soft you can just pull the chips off with a flathead screwdriver.  Other people have told me that they have no problem whatever with EA cartridges, so I'm still not sure what to make of it.  I can desolder SEGA PCBs so cleanly that the chips fall off with gravity.

 :dunno

For the 40 pin PCBs, just burn a 512Kb game, bend up legs 1 and 42, and then tie those two legs to 5V.  I don't recommend running jumper wires to the cartridge edge connector.  I did it and screwed up my female connector on my Genesis motherboard.  That was before I was using Kynar wire, though.

Anyway, Malenko and I have made an enormous library of Genesis cartridge labels suitable for printing.  It's his google drive so his call if he wants to post it publicly.

 :cheers:

Im in the US, so 110v. I actually have a 40 pin m27c4002 eprom burned and it does not work. Don't know if its the chip or if I need to mod the pcb. Figured with them being 40 pins and same size it would work without mods but no. I burned the the same image to a 42 pin 2mb rom and put in a 42 pin 2mb cart and it works. All the ones I've desoldered so far are assembled in the usa.
« Last Edit: June 10, 2023, 12:08:49 am by bulldawg »

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Re: Making SEGA Genesis cartridges
« Reply #211 on: June 10, 2023, 12:04:18 am »
Anyway, Malenko and I (mostly Malenko) have made an enormous library of Genesis cartridge labels suitable for printing.  It's his google drive so his call if he wants to post it publicly.
FTFY
https://drive.google.com/drive/folders/1tVZb-Crq0XpU-4xo4HXjcYyn5VgqTLa-?usp=sharing

they arent perfect, some are super custom.
Thanks for sharing.

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Re: Making SEGA Genesis cartridges
« Reply #212 on: June 10, 2023, 06:57:13 am »
Did you swap the bytes?

https://www.romhacking.net/utilities/1621/

Also check the unswapped rom in Kega Fusion first and make sure you don’t get error messages.

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Re: Making SEGA Genesis cartridges
« Reply #213 on: June 11, 2023, 05:40:30 pm »
Lighter fluid is $1.50 here for a 32oz bottle.  I have 4oz in that plastic food tub and so far I’ve removed six labels.  Put the lid back on and it doesn’t evaporate.  I’m good.

Labels are printed on a color laser on full sheet mailing labels.  I can get six per sheet and have enough room to make EPROM labels.  The sheets are 10 cents each.

Here’s a 42 pin 2MB eprom running a half megabyte game on a 40 pin pcb.  Legs 1 and 42 are bent up and tied to ground.  Works perfectly.

 :cheers:
How to get a 42 pin 2MB eprom running on a 512mb 42 pin pcb?

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Re: Making SEGA Genesis cartridges
« Reply #214 on: June 11, 2023, 05:48:54 pm »
Did you swap the bytes?

https://www.romhacking.net/utilities/1621/

Also check the unswapped rom in Kega Fusion first and make sure you don’t get error messages.
Yep byte swap and checked in kega.

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Re: Making SEGA Genesis cartridges
« Reply #215 on: June 11, 2023, 06:22:19 pm »
What rom are you trying to run?  If it’s 512Kb, you bend up eprom pins 1 and 42 and jump them to 5V.  If it’s 1MB or 2MB, follow my pic from the first page of this thread showing which pins on the edge connector need what.  Tell me the game and I’ll play along.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #216 on: June 11, 2023, 07:49:20 pm »
Golden axe 2 on a 2mb 42 pin eprom. Donor pcb is RBI 93 42 pin 512kb pcb. So even if its 42 pin pcb still bend first 2 legs?
« Last Edit: June 11, 2023, 07:51:01 pm by bulldawg »

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Re: Making SEGA Genesis cartridges
« Reply #217 on: June 11, 2023, 09:02:33 pm »
No… no…. Only bend the legs if the PCB is 40 pin.

I’m almost positive I have one of those RBI boards laying around.  I’ll convert to Golden Axe 2 and take pictures.


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Re: Making SEGA Genesis cartridges
« Reply #218 on: June 12, 2023, 09:08:10 am »
Are you using M27C400 or M274002?  4002 has the wrong pin out. 

Okay, assuming that you're using M27C400 and your PCB is the same as pictured here:



(found on this page:  https://www.pricecharting.com/game/sega-genesis/rbi-baseball-93 )

Pin 1 on the ROM is running to B7.  Pin 42 is being pulled high to 5V.  Your simplest fix is going to be cutting the trace on the back of the board for pin 42, and running a jumper wire from pin 42 to B8 on the edge connector.  That will tell the Genesis it's a 2MB EPROM.

 

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Re: Making SEGA Genesis cartridges
« Reply #219 on: June 12, 2023, 09:33:00 am »
Are you using M27C400 or M274002?  4002 has the wrong pin out. 

Okay, assuming that you're using M27C400 and your PCB is the same as pictured here:



(found on this page:  https://www.pricecharting.com/game/sega-genesis/rbi-baseball-93 )

Pin 1 on the ROM is running to B7.  Pin 42 is being pulled high to 5V.  Your simplest fix is going to be cutting the trace on the back of the board for pin 42, and running a jumper wire from pin 42 to B8 on the edge connector.  That will tell the Genesis it's a 2MB EPROM.
Im using m27c160 on this one. I should have mentioned this is different from the other one I was working on. But that would make sense why the other board is not working being 4002 is different pinout.

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Re: Making SEGA Genesis cartridges
« Reply #220 on: June 12, 2023, 02:42:16 pm »
I've read that the only difference between an EPROM and OTP ROM is the quartz window.  If you can somehow expose the internals, you can erase a OTP.




I tried my soldering iron at 900 degrees and couldn't cut through the housing. 

Tried the dremel on another chip.  It exposed the internals but I think went a little too far.   :-\



Still working on a process... surely something will eat away the housing gently.   :dunno


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Re: Making SEGA Genesis cartridges
« Reply #221 on: June 12, 2023, 05:02:56 pm »
Are you using M27C400 or M274002?  4002 has the wrong pin out. 

Okay, assuming that you're using M27C400 and your PCB is the same as pictured here:



(found on this page:  https://www.pricecharting.com/game/sega-genesis/rbi-baseball-93 )

Pin 1 on the ROM is running to B7.  Pin 42 is being pulled high to 5V.  Your simplest fix is going to be cutting the trace on the back of the board for pin 42, and running a jumper wire from pin 42 to B8 on the edge connector.  That will tell the Genesis it's a 2MB EPROM.
Well this one is going to be a no go. I was redoing my connection from pin 42 to b8 and the pad lifted up. Oh well. Thanks anyway.

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Re: Making SEGA Genesis cartridges
« Reply #222 on: June 12, 2023, 05:29:02 pm »
Put a jumper wire on pin 42 and try it pulled to ground and see if it boots.  If it doesn't, tie it back to 5V.  If that doesn't work, tie pins 1 and 42 together, and then try 5V and then ground.  One of those combinations will make it work.

If you have 42 pin holes on the PCB, there's no need to lift legs, but you may have to cut traces to properly isolate the pins before you add the jumper wires.


Here's a Forgotten Worlds (512Kb ROM) on a 40 pin PCB burned to a 2MB 42 pin EPROM.  I've lifted legs 1 and 42, jumped them together, and jumped to the 5V on the back of the PCB.




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Re: Making SEGA Genesis cartridges
« Reply #223 on: June 12, 2023, 07:57:12 pm »
Put a jumper wire on pin 42 and try it pulled to ground and see if it boots.  If it doesn't, tie it back to 5V.  If that doesn't work, tie pins 1 and 42 together, and then try 5V and then ground.  One of those combinations will make it work.

If you have 42 pin holes on the PCB, there's no need to lift legs, but you may have to cut traces to properly isolate the pins before you add the jumper wires.


Here's a Forgotten Worlds (512Kb ROM) on a 40 pin PCB burned to a 2MB 42 pin EPROM.  I've lifted legs 1 and 42, jumped them together, and jumped to the 5V on the back of the PCB.


Pin 42 to ground worked. Thanks alot.

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Re: Making SEGA Genesis cartridges
« Reply #224 on: June 12, 2023, 08:05:17 pm »
Where are you picking up 5v from? That might be what I need to fix that other pcb. The 40 pin one I have.

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Re: Making SEGA Genesis cartridges
« Reply #225 on: June 12, 2023, 10:25:33 pm »
Yellow is a hypothetical jumper from pin 42 to 5V.  Blue is a jumper to ground.  Some games/chips work with one, some with the other.  Try both.


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Re: Making SEGA Genesis cartridges
« Reply #226 on: June 12, 2023, 10:54:26 pm »
So pin 1 and 42 to 5v no go, but both to ground and I get the sega screen followed by a red screen. So some progress. This is the 40 pin nhl 93 pcb with the trace cuts and jumpers. Also just to note I have a socket installed and the legs are down but not touching pcb. I have tmnt hsh 1 mb image on 2mb eeprom.
« Last Edit: June 12, 2023, 10:58:22 pm by bulldawg »

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Re: Making SEGA Genesis cartridges
« Reply #227 on: June 12, 2023, 11:05:59 pm »
Cut the traces above A8 and A9 above your jumper wires.  You don’t want them connecting to any of the SRAM stuff.

If that doesn’t do it, reflow your socket connections.  Particularly top row towards the middle.

You’re positive the checksum is correct?  Red screen is usually checksum error.

You’re close.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #228 on: June 12, 2023, 11:20:26 pm »
Cut the traces above A8 and A9 above your jumper wires.  You don’t want them connecting to any of the SRAM stuff.

If that doesn’t do it, reflow your socket connections.  Particularly top row towards the middle.

You’re positive the checksum is correct?  Red screen is usually checksum error.

You’re close.

 :cheers:
So I cut the traces above a8 and a9, I checked all the pins for continuity and all good and I dumped the rom and test in kega and it works but still no go.

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Re: Making SEGA Genesis cartridges
« Reply #229 on: June 12, 2023, 11:23:38 pm »
Open the rom header on the rom suite program and make sure it matches.  I can post a pic tomorrow.  Or just email it to me and I’ll test. (Pinballjim at hotmail dot com)


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Re: Making SEGA Genesis cartridges
« Reply #230 on: June 13, 2023, 10:57:06 am »
you wonna try SNES games next? they are super easy! :P ive done about 2 dozen games. same same, remove rom, burn a new one byte swapped... couple jumpers to swap 2 legs, and done.

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Re: Making SEGA Genesis cartridges
« Reply #231 on: June 13, 2023, 11:16:02 am »
Through a combination of work incentives and class action lawsuit payouts, I managed to pick up an SD2SNES for about $40 out of pocket.  That has instant loading, save state support, etc etc.  Should be here by the end of the week.

I also don't really feel the urge to do the SNES thing like I did Genesis, and you get into complications like buying expensive donor cartridges or making new expensive blanks.  Star Fox 2 is slightly tempting, but even that's gonna be about $20-30 each and you have to snuff another game to do it.  I've got a few tire kickers on that one but nobody's committing.  I see people selling those for ~$60 and frankly that's probably worth it if you want one.





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Re: Making SEGA Genesis cartridges
« Reply #232 on: June 13, 2023, 11:35:49 am »
I managed to pick up an SD2SNES for about $40 out of pocket.

i would buy one of those carts if they didn't want 225 bucks for the latest everdrive "FXpak pro" version ones... and 199 for the n64 one to while i was at it.

that said i've probably spent over 200 bucks on used carts and roms to make the ones i have now. c'est la vie  :dunno

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Re: Making SEGA Genesis cartridges
« Reply #233 on: June 13, 2023, 01:00:03 pm »
$105 for a Chinese version.  It’s not even a bootleg as it was all open source.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #234 on: June 24, 2023, 12:16:04 am »
Open the rom header on the rom suite program and make sure it matches.  I can post a pic tomorrow.  Or just email it to me and I’ll test. (Pinballjim at hotmail dot com)
So I burned another eprom with your image and still no go. But I tried that rom in another donor pcb and it worked. Something else im missing on the first pcb.

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Re: Making SEGA Genesis cartridges
« Reply #235 on: June 24, 2023, 12:19:17 am »
On a side note this is all the ones I've been successful with thus far, except mk im waiting on m27c322 eproms.
« Last Edit: June 24, 2023, 12:22:49 am by bulldawg »

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Re: Making SEGA Genesis cartridges
« Reply #236 on: June 24, 2023, 05:41:07 pm »
I may actually cry a little.  I'm glad you got TMNT working.

Here's how I do my labels.  It took me dozens of attempts to work out this method.  You may consider it.  I've actually reprinted and replaced a bunch of mine.

First buy 100 full sheet mailing labels off the ebay for ~$15 and print six labels to a sheet:



(I like to use the leftover white space to make EPROM labels and also has a note in there about what sizes the SEGA/EA labels should be)


You can do this before or after the clearcoating, but peel the backing side and cut slits underneath where it rests on the labels.  Keeps you from nicking them up trying to peel them later.



Tape it to the vertical side of a cardboard box.  One misty coat so you don't make the ink run.  Wait an hour, give it a second coat.



Then cut them out as straight as you can manage.  Run a sharpie sideways along the sides.  You can see I've done about half this edge in this photo:



Here's the whole side done:



Then when you slap it on the shell, you don't have a white leading edge:



I've got a multicolor set of sharpies, so I use red/blue/orange/whatever as most closely matches the art.

 :cheers:

(and this is an extra Cave Story cartridge.  who wants it?  :P)

« Last Edit: June 24, 2023, 05:43:18 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #237 on: June 25, 2023, 04:38:23 pm »
That's some next level label work.  :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #238 on: July 07, 2023, 05:38:06 pm »
I may actually cry a little.  I'm glad you got TMNT working.

Here's how I do my labels.  It took me dozens of attempts to work out this method.  You may consider it.  I've actually reprinted and replaced a bunch of mine.

First buy 100 full sheet mailing labels off the ebay for ~$15 and print six labels to a sheet:



(I like to use the leftover white space to make EPROM labels and also has a note in there about what sizes the SEGA/EA labels should be)


You can do this before or after the clearcoating, but peel the backing side and cut slits underneath where it rests on the labels.  Keeps you from nicking them up trying to peel them later.



Tape it to the vertical side of a cardboard box.  One misty coat so you don't make the ink run.  Wait an hour, give it a second coat.



Then cut them out as straight as you can manage.  Run a sharpie sideways along the sides.  You can see I've done about half this edge in this photo:



Here's the whole side done:



Then when you slap it on the shell, you don't have a white leading edge:



I've got a multicolor set of sharpies, so I use red/blue/orange/whatever as most closely matches the art.

 :cheers:

(and this is an extra Cave Story cartridge.  who wants it?  :P)
That's some quality work.

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Re: Making SEGA Genesis cartridges
« Reply #239 on: July 07, 2023, 05:42:48 pm »
Got my m27c322 roms today and programmed Mortal Kombat arcade edition and it works until the end of round one and freezes. Donor Cart was nfl qb club 96 which is a 4mb cart and my rom is 4mb any ideas?
« Last Edit: July 07, 2023, 05:46:25 pm by bulldawg »

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Re: Making SEGA Genesis cartridges
« Reply #240 on: July 07, 2023, 09:41:31 pm »
Yep, remove those chips above your eprom and then add jumper wires that will reconnect your chip legs to the appropriate pin on the edge connector.  Look for traces that come off your eprom and go up to the chips and don’t have a direct connection going down.  Looks like maybe pin 9 off the eprom?




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Re: Making SEGA Genesis cartridges
« Reply #241 on: July 07, 2023, 09:54:37 pm »
Is it because those are sram?

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Re: Making SEGA Genesis cartridges
« Reply #242 on: July 07, 2023, 10:17:01 pm »
You put a non saving game on a saving PCB.  That means when the game is trying to load a certain part of the rom, it’s accessing those save game chips instead.  You need to remove or disable the chips and make a direct connection from the eprom to the edge connector.




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Re: Making SEGA Genesis cartridges
« Reply #243 on: July 07, 2023, 10:21:15 pm »
Well I had read that the hack had a built-in feature to use SRAM to save the high scores but apparently it's not compatible.

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Re: Making SEGA Genesis cartridges
« Reply #244 on: July 07, 2023, 10:24:49 pm »
You put a non saving game on a saving PCB.  That means when the game is trying to load a certain part of the rom, it’s accessing those save game chips instead.  You need to remove or disable the chips and make a direct connection from the eprom to the edge connector.
From what I can tell by removing those two chips it doesn't interrupt the path from the eprom to the edge connector. Or I may be misunderstanding.

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Re: Making SEGA Genesis cartridges
« Reply #245 on: July 08, 2023, 03:50:49 pm »
Removing the two chips worked, did not have to add jumpers. Thanks

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Re: Making SEGA Genesis cartridges
« Reply #246 on: July 09, 2023, 08:40:54 am »
So, I took a deeper look at Quarterback Club 96 vs Mortal Kombat Arcade Edition.  I had no idea that there was a single chip 4MB ROM game with saving, and that could actually be a useful PCB for Phantasy Star 4, Beyond Oasis, and some of the new homebrew like Cave Story.  I don't think I've had one of those PCBs come across my desk, but I'll definitely take a closer look.

Anyway, here's how the two headers compare:



Notice that the ROM End address is total nonsense on MK, instead of RA it's got ||, and 5421 instead of E840.  It also points to a non-standard SRAM start and end address.  I've contacted the patch creator about some of his other SRAM patches, most recently his Ghostbusters one, and he and I have a difference of opinion on what "tested on actual hardware" means.  He's playing these on Everdrives, and the layer of emulation those have ignore these mistakes and work anyway, but none of this will work on an actual cartridge.  Even going in and manually correcting this won't make it work, so in short I have never gotten a single one of his SRAM patches to work on actual cartridges. (and I've tried many of them)  He did release a revision of Ghostbusters that fixes some of the header junk.  Still doesn't save on a real cartridge.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #247 on: July 09, 2023, 11:57:13 pm »
Fyi College Slam is the same way.

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Re: Making SEGA Genesis cartridges
« Reply #248 on: July 10, 2023, 01:18:16 pm »
Well, all those 4MB Akklaim boards are also ones where you can just simply pry off the ROM, so I actually had about a dozen of them stripped and ready to go.

I gave it a couple of tests with Cave Story.  Once with no modification to the header, and a second attempt where the header had been modified to match Big Hurt on the SRAM start and end spaces.

Anyway, booted fine with both setups but would not save on either.  I like Cave Story as a test because it's fairly tolerant and you know within moments if saving will work or not.  So unless the game is programmed to use EEPROM, I'm doubtful it's going to work.


I've attached the document from the Everdrive website that discusses all the different EEPROMs.  Really the only thing of interest is that Sports Talk Baseball can be directly converted to Wonder Boy in Monster World.

(and College Slam is actually a decent game)


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Re: Making SEGA Genesis cartridges
« Reply #249 on: July 28, 2023, 12:46:18 pm »
I really need to clean up the first post on this thread and edit it to have all the useful information.

Anyway, this is mostly for my self reference, but here's how to use those old SEGA boards with the chips popped off.  This time with cleaner jumper wires.  The only thing happening on the back is I've cut the line from pin 42 of the EPROM to 5V.  Pac-Mania is a tiny ROM, so I'm pulling the 2MB pin to ground (wouldn't boot otherwise...).  Punisher and Robert Cop 2 are both 2MB, so I jump that pin to a trace running to the 2MB pin on the cartridge connector.


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Re: Making SEGA Genesis cartridges
« Reply #250 on: July 31, 2023, 10:55:59 pm »
Above games with appropriate labels.






This is actually a borderline good game. Apparently it was an internet meme I missed.






I haven’t figured out how to rewire this particular pcb, but I don’t think it will be difficult.  I find this chip prying to be endlessly amusing.





Anyway, I’ve recently gotten some “really good deals” on cartridge lots but I have to pull the plug on this at some point.  If you want a Genesis cartridge… fairly soon is the time.


 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #251 on: August 01, 2023, 07:19:41 am »
great work as always. I still think I missed my calling as  a bootleg/repro artist.
If you're replying to a troll you are part of the problem.
I also need to follow this advice. Ignore or report, don't reply.

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Re: Making SEGA Genesis cartridges
« Reply #252 on: August 06, 2023, 10:48:07 pm »
So I have tried 2 eproms with Sonic Hellfire saga and neither work. Both show license screen then black. I have tested both with my test cart. The first one I read it and it was a bad write because the data was all messed up. Then second had a good read but still no go.

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Re: Making SEGA Genesis cartridges
« Reply #253 on: August 07, 2023, 03:05:06 pm »
The public release doesn’t work.  I have a revision.  Did I email it to you already??


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Re: Making SEGA Genesis cartridges
« Reply #254 on: August 07, 2023, 06:25:12 pm »
No that was tmnt.

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Re: Making SEGA Genesis cartridges
« Reply #255 on: August 07, 2023, 06:27:02 pm »
Also does anyone have a dump of Frog Feast for the Genesis?

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Re: Making SEGA Genesis cartridges
« Reply #256 on: August 07, 2023, 07:51:53 pm »
Sent you the revision.  I don’t have Frog Feast.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #257 on: August 07, 2023, 09:01:01 pm »
Thanks.

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Re: Making SEGA Genesis cartridges
« Reply #258 on: October 09, 2023, 04:49:31 pm »
So here's an intro in the next stage of this lunacy...

Picked this up for $15 QMK LQQK mint and CIB



Problem is that Sega used the physical cartridge shape as a region lockout.  I had hoped that Sega would have given up on that given this was a custom shell, but there's that damned Megadrive notch. 



They also used a software region lock on this.  Thanks, Sega. (note to some of you - see that I am wearing both pants and a shirt in that reflection, this is how it should be done)

A simple Game Genie code (RYBA-E61G) will bypass both the physical size issue and software lock, but where's the fun in that



Step 1 is a mod I first did back in the 90s.  This time I routed the region switch out of the back of the unit.  There's already a perfectly sized hole for my toggle switch.  Genesis Model 1 also has this hole... maybe from the molding process?  Whatever, it fits.





I opted to cut a trace and scrap off some solder mask rather than lift a leg on that chip.  All the mod does is toggle between grounding that pin out (Japan) or pulling it to 5V (USA).  There's no need for PAL support in my life so I didn't bother with that mod.

That takes care of the region lock, now you have to make the genesis slot a rectangular shaped hole.

So, you get PL1 to print you some replacement cartridge slot doors.  Then you take a dremel cutting wheel to it, and then you realize the spinning shaft is etching your case, so you go back to old reliable of using your soldering iron to rough cut the plastic, a sharp pocket knife to whittle it, and then a file.  Not perfect but actually fairly pleased with this:



Looks even better with a cartridge stuck in there:




So, there's obviously no point in stopping here so I've got some Megadrive shells in the mail.  I'm sure I could get a cardboard box full of games in Japan for nothing but they're actually fairly expensive on Ebay.  Since the PCBs are the same, I figure I'll just burn the ROMs myself.

 :cheers:

pbj

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Re: Making SEGA Genesis cartridges
« Reply #259 on: October 20, 2023, 11:39:04 pm »
I mean… might as well lean into it.  My megadrive shells arrived yesterday.

I’m still working out the art template with ginger bae but we’re getting close.  This game may actually be the best graphics I’ve seen on Genesis.



Standard genesis shell in back for comparison.

pbj

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Re: Making SEGA Genesis cartridges
« Reply #260 on: December 12, 2023, 09:47:32 pm »
I had some more pcbs printed up.  If you want one, chime in soon.  I think I have 30ish 2MB EPROMs laying around and this project is done






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Re: Making SEGA Genesis cartridges
« Reply #261 on: December 18, 2023, 08:12:16 pm »
I think I need to buy the JAP version of Virtua Racing.
If you're replying to a troll you are part of the problem.
I also need to follow this advice. Ignore or report, don't reply.

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Re: Making SEGA Genesis cartridges
« Reply #262 on: January 11, 2024, 11:58:44 pm »
Started working on this again.
« Last Edit: January 13, 2024, 03:54:39 pm by bulldawg »

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Re: Making SEGA Genesis cartridges
« Reply #263 on: January 24, 2024, 12:26:15 am »
I had some more pcbs printed up.  If you want one, chime in soon.  I think I have 30ish 2MB EPROMs laying around and this project is done




Have you tried to use the surface mount flash chips on these boards? Also have you ever tried doing a 6mb cart?

pbj

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Re: Making SEGA Genesis cartridges
« Reply #264 on: February 29, 2024, 01:23:24 am »
Okay, dammit, I watched some YouTube video about “Genesis games nobody ever talks about” and got dragged back in for a few more.  These are both interesting games and I had access to glossy labels, a color laser printer, and “gloss print” mode.  The end result was so good it makes me want to redo them all but that would almost as crazy as spending $2,000 remaking genesis bootlegs you can run off a $20 flashcart.



The labels have the slightly translucent look of the originals.  Dragging a fingernail across some test prints was okay, but if you flex the sticker you’ll get crackling.  Not quite sure how SEGA did it, but these are as close as I’ve gotten so far.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #265 on: March 04, 2024, 11:57:45 pm »
Another last gasp.  Retro Bit is making “big six” controllers.  These are the old three button shell with the six button dpad and buttons.  It’s messing with my muscle memory but I did okay on Super SF2.  10 foot cord, working with both my actual console and my Retro Trio 3+.A very nice product for $16 shipped.




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Re: Making SEGA Genesis cartridges
« Reply #266 on: March 07, 2024, 07:09:21 pm »
This is one of the most entertaining projects I've seen here in years.

I'm only 25 EPROMs into my Mega-Tech bootleg effort but love this perfect (almost) trainwreck :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #267 on: March 29, 2024, 07:49:30 pm »
This is awesome! I did a similar project for my SNES. I swapped all my NA cart guts to SFC carts and redesigned the front and rear labels.

https://www.reddit.com/r/retrogaming/comments/1br3a2e/custom_snes_labels/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

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Re: Making SEGA Genesis cartridges
« Reply #268 on: March 29, 2024, 11:19:21 pm »
Hey, those look great, nice work.  Where are you sourcing the cases?

I’ve picked up a few Super Famicom carts lately because they’re so ridiculously cheap.  So cheap, relative to American carts, that I’ve contemplated popping the chips off the boards and burning US ROMs.  Particularly the Final Fantasy games that are $5 vs $50.

 :cheers: