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  1. Arcade repair party's in Arizona

    It's awesome having 5 bosses, lol. In reality one of the main purposes of these "parties" is to teach people how to repair their games themselves so there's lots of watching and hopefully LEARNING going on.
  2. Arcade repair party's in Arizona

    No discord as far as I know but I believe @Arcadenut and @BigDogs connect with some on Facebook.
  3. Arcade repair party's in Arizona

    Yes, I just got home from today’s (yesterday’s) event. We typically do them once or twice a month. We just posted pics from this event a couple of posts back. Fixed a Pole Position II with graphics issues, got a couple monitors repaired and brought a “Quasar” back to life.
  4. Tank 8 as FPGA?

    If you open the info.mac file it describes what all these files are. They are not a “core” or anything related to FPGA code. Scanning through them quickly they look to be either original source files or disassembled object files for the original game. They include dumps of the ROMs and PROMs on...
  5. First color video game?

    Not all of them. Exidy's color games Star Fire and Fire One used a very unique method of separate memory spaces for the luma (intensity on or off) and chroma (color). The really interesting part is the color resolution was lower than the BW resolution so adjacent pixels had to be the same color...
  6. Vector Garbage

    Unfortunately the awesome AR2 design is not quite 100% efficient. Probably losing 20% or more in the transformer then another > 50% since the 5V is pass regulated from a 10.3V raw supply. This is not even counting rectifier losses wiring losses etc.
  7. Vector Garbage

    So I can't buy one of your 6502s? Maybe check on @HudsonArcade ‘s coffee table?
  8. Vector Garbage

    So you want me to believe this “customer” of yours had one of Scott’s Tempest multi FPGA kits plugged into his Omega Race cab with an “original spinner” and he “replaced” it with one of your Omega Race multi software emulation boards? Sounds reasonable. 🤣
  9. Vector Garbage

    There’s an Omega Race FPGA? Where can I get one? I’ll take one of your 6502s also!
  10. Does ChatGPT know what it's talking about?

    Until you can get a good picture of PO/SPO that shows the detail of the individual red green and blue sub pixels will you begin to understand the difference you are “seeing”
  11. Does ChatGPT know what it's talking about?

    There’s some camera focus issues going on here, perhaps related to the tinted glass changing the focal point of the camera or possibly the distance from the camera to the screen, was one of these pics cropped way more than the other? You can clearly see the RGB phosphor pixels in the left...
  12. Does ChatGPT know what it's talking about?

    As much as I hate to validate anything ChatGPT comes up with, everything it came up with is accurate descriptions of why a video signal would look "sharper" vs "more smooth". Unfortunately most if not all if it doesn't apply to the Nintendo hardware nor the 20EZ monitor. It did miss one detail...
  13. Exidy Opto PCB Repair or Replacement

    You're in Tempe? There's a local repair party happening this Sat. in Chandler, unfortunately I'll be out of town but @Arcadenut and @BigDogs will both be there. If you are using a Happ gun I'm assuming you are using one of my FPGA boards since the original gun works on 12V not 5V?
  14. Aladdin's Castle Memo

    @Dillweed what board is that and what IC location? I'd be curious to see what 2 pins of what IC in what circuit those are.
  15. Aladdin's Castle Memo

    That was my first thought as well but I haven't seen any used in the arcade industry up to this point. There's not really anything needing that level of precision. I think it might've been some kind of inside joke between the engineers or possibly a "copy detection" scheme. Whatever it was/is...
  16. Aladdin's Castle Memo

    They would've had to do that anyways to keep the picture size the same with double the feedback voltage. I assumed there was a second part of this mod that changed other resistor values to double the forward path voltage as well. I don't think this was a "field update" I think it was a factory...
  17. Lost all Audio - Tail Gunner II

    One other failure mode I've seen but forgot to mention, the volume pot. I've seen them get pretty noisy and even have "dead" spots where there's no continuity so I'd check that as well.
  18. Lost all Audio - Tail Gunner II

    For some reason I thought it did, I rewired a couple of them for a friend but I also did an upright so maybe I'm confusing them OK then at least Pin 16 and 10 of the cable is making connection and the '259 on the CPU is not COMPLETELY dead, still could have 1 or more bad outputs though. Do the...
  19. Lost all Audio - Tail Gunner II

    Andrew is trolling you, he’s not the brightest bulb but I’m pretty sure he’s not THAT dim. Both of those transistors were clearly fine, if you have ANY hfe (forward current gain) then the transistor is functioning. I’m curious what Uf is, it looks like maybe Vbe or Vce sat but I’ve never seen...
  20. Aladdin's Castle Memo

    I think they may have been trying to improve the signal to noise ratio on the feedback signal or maybe they were trying to lower the power/heat vs volume as you posted originally and they made the same mistake you did not realizing the power was doubling. Several in this thread made that same...
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