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Making SEGA Genesis cartridges
bulldawg:
--- Quote from: pbj on June 09, 2023, 06:27:47 pm ---
--- Quote from: bulldawg 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.
--- End quote ---
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:
--- End quote ---
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.
bulldawg:
--- Quote from: Malenko on June 09, 2023, 06:32:37 pm ---
--- Quote from: pbj on June 09, 2023, 06:27:47 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.
--- End quote ---
FTFY
https://drive.google.com/drive/folders/1tVZb-Crq0XpU-4xo4HXjcYyn5VgqTLa-?usp=sharing
they arent perfect, some are super custom.
--- End quote ---
Thanks for sharing.
pbj:
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.
bulldawg:
--- Quote from: pbj 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:
--- End quote ---
How to get a 42 pin 2MB eprom running on a 512mb 42 pin pcb?
bulldawg:
--- Quote from: pbj 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.
--- End quote ---
Yep byte swap and checked in kega.
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