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1   Everything Else / Re: RIP - The Dead Celebrity Threadon Yesterday at 09:31:11 pm

Started by Ginsu Victim - Last post by Mr. Peabody

Lindsey Graham, who served as...


A world-class turd.  He doesn't rate inclusion here, for creating and perpetuating gross difficulty and malfeasance. Or in Southern terms: he needs a first class hangin!  Of course, boyo didn't have the guts to come out.


Now, I ain't ever registered to vote, and I have belonged to Nothing. Just, as the manifestation of God in THE ETHIOPIAN BIBLE.....THE SOURCE OF SCRIPTURE....I'm tellin ya how it is, and intimating how it will go. Cos All ya all GUILTEH. Just a matter of how, and to what degree.

2   Main Forum / Re: Space Aceon Yesterday at 09:02:31 pm

Started by spisi - Last post by Mr. Peabody

No surprise laser disc game development faltered. A lot of ways to approach it, and not the interest, especially in the last ten years. It started in 2009 with Aaron doing film-resolution conversions, documenting the process on his blog in text and video. Few took up the mantle, let alone with similar standards I think. And MAME's codebase may have developed away from that work, even.

I don't care for the high-res images. I like seeing it in 640x480 on a CRT, with 23fps sources format.


-- later:


I found this: https://emulation.gametechwiki.com/index.php/Arcade_LaserDisc_emulators



Hypseus Singe is an SDL3 update to the DAPHNE emulator engine.  It includes fixes to many existing Daphne games and supports one game that neither Daphne nor MAME currently support: Stern's Goal to Go.


The reason MAME doesn't emulate many LaserDisc-based systems, is largely due to indecisions regarding the disc preservation method and format. This will hopefully be fixed in the future thanks to the Domesday86 project which employs a combination of specialized hardware and open-source software to preserve the discs in a far more faithful manner than ever before. Raw captures can be converted to playback formats for other emulators (e.g., Hypseus-Singe) using ffmpeg to get the best visual quality.which employs a combination of specialized hardware and open-source software to preserve the discs in a far more faithful manner than ever before. Raw captures can be converted to playback formats for other emulators (e.g., Hypseus-Singe) using ffmpeg to get the best visual quality.

3   Everything Else / Re: RIP - The Dead Celebrity Threadon Yesterday at 08:27:54 pm

Started by Ginsu Victim - Last post by Zebidee

Derryn Hinch, "The Human Headline", veteran TV broadcaster and public personality who was very direct about causes he believed in. Kind of guy everyone loved, even if they didn't like him.


https://www.abc.net.au/news/2026-07-11/derryn-hinch-greatest-hits-as-journalist-dies-aged-82/106903114

Started by diverdown - Last post by BBuncky2

Bumped as I still need help

I just bought an old ticket redemption machine called "Diggers Prize"

It was made in 1993 by cromptons (which got bought out by ICE)

It works fine except is missing one solenoid that controlls the digger's up down movement.

The idea of the game is to pick up balls in the digger, dump them into a conveyor belt which fills a hopper at the back. The more balls in the hopper the more tickets it spitz out. In my case the more balls in the hopper the more fun my son has.

Below are pics of the actual solenoid that i am missing ( its identical to the ones in the picture.

Does anyone have any ideas where to get one, or even how to jerry rig  some other solenoid/valve?


any help would be appreciated.

This issue solved -   but more problems ahead --  see below

Hey, I know this is probably a long shot-- Did you ever take any video or audio of this machine in action?  I am dying for those old sounds of this machine working.  To this day, I still say "Up'pa lit-tle"... "Down a little" to my family.  They've never heard the game, but yet they now say that too. I would LOVE to be able to get those sounds for them to hear! 

5   Everything Else / Re: You people are still here!on Yesterday at 12:07:55 pm

Started by RayB - Last post by yotsuya

‘Sup?


Sent from my iPhone using Tapatalk

6   Main Forum / Re: Space Aceon Yesterday at 08:15:17 am

Started by spisi - Last post by spisi

OK FYI MAME can not play Space Ace...you need the Daphne emulator.

7   Monitor/Video Forum / Re: MTC 9110 CRT dim help pleaseon Yesterday at 01:23:45 am

Started by asuitor - Last post by grantspain

does the sub brightness pot work, its behind the flyback

Started by saint - Last post by Zebidee

sync blocker 15khz only

Started by Zebidee - Last post by Zebidee

MORE MORE SYNC


Over the past month or so I've been working on solutions on blocking non-15khz video signals.


Thirdly, it will BLOCK higher frequency signals (VGA, 31khz+) automatically (optional, but on by default). I hope so anyway, because I haven't tested this last part yet :)


Doing this with purely "analog" components proved to be a big challenge, and I wasted time exploring several dead-ends before finally getting to a reliable solution. Even so, I learned a lot from this exercise.

I asked AI for help at different times. Occasionally it did help by giving me a different perspective, but mostly (80-90%) it just led me down garden paths that led to nowhere. It can make mistakes too, sometimes silly mistakes, so use with caution.

"Filtering" out frequencies >15khz was a false hope. Not impossible, but completely impractical.

Better approach is comparing frequency cycles (hertz) via a tuned-in phase-locked loop (voltage controlled oscillator). It works much better because you don't have to filter anything out, just compare PLL with input frequency patterns. If they are a match then it "unlocks" and you're in.

At first I thought I could do this with a single IC, and was trying to do so with the tireless LM567/NE567/LMC567, a tone decoder that has been around almost as long as I have (>50 years). It has been used extensively in the telecommunications industry for tone dialling and other such. Being an industry stalwart (like myself!), it has been copied and cloned and reinvented many times (also me!), but mostly appears in a 8-pin DIP-8 or SOIC-8 or SOP-8 packages. One variant is optimised for low-power (LMC567), but it also requires different external components so this makes testing and prototyping messy. Often I didn't know what the IC i was working with expected from me, but I muddled along and eventually worked things out. But it still wouldn't lock-in on the sync signal input.

Finally I realised that the 567 wan't locking-in because this video sync input is mostly HIGH (~93%), with only briefly pulses LOW  (7%), and the 567 expects to see input frequencies with a duty cycle closer to 50%.

So I had to introduce another IC, the famous LM555/NE555/TLC555 to "square-up" and "fatten" the sync pulses before feeding them into the '567. The '555 is of the same family as the '567, of similar age, and also comes in the same 8-pin packages (DIP-8, SOIC-8, SOP-8).

The '555 is much easier to work with than the '567, but fattening the sync still presented some challenges. One of these was that I couldn't just output a pure 50% duty-cycle output to the '567, because that would effectively turn 31khz into 15khz and then it would erroneously pass the PLL lock/key test.

Instead I settled for a duty-cycle of about 40% from the '555. These fattened pulses maintain original frequencies (e.g. 15khz, 25khz, 31khz), and the '567 only unlocks it's output pin for a true 15khz signal input.

I will post on this in more detail later, but wanted to put something up now because I'm pretty excited that this is working out.

Sorry this post seems long. Really only skimmed over the details, was trying to be brief.

Some more testing to do, but I hope to include this functionality into GreenAntz soon. I can also foresee a bunch of other applications for this in our hobby space.

I have linked to a very basic, short video (click on the picture below). Watch the LED on the breadboard. If I can turn an LED on then I can do anything  >:D



Started by geecab - Last post by burritodamus

Sorry it took a bit to reply...lightning had fired my machine.... thankfully had backups, just didnt have time.  I tried your suggestions and also went way further down the AI rabbit hole to no avail.  I definitely do not want you recompiling your game for my version of nostaligia.  I enjoy playing it as it is.   If you ever tinker with it in the future to add simulated scanlines or end up playing with reshade for yourself let me know.   Until then thanks for all the work you did to bring this to life.
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