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  1. WydD

    Official: CPS1 Multi by Darksoft/Apocalypse - Interest Check Thread

    A-01 analysis is in progress. But it will take months like the B-21.
  2. WydD

    Extreme CPS2 Battery Damage Repair - ROUND 3!

    If you have nothing on the code rom it maybe means that nothing is transmitted through the DL-1727 (MIF) which is main purpose is to manage the main bus. And because sound is derived from the main bus, it's kinda the same thing. So I would check: - All the main enable lines: ~RESETI (HIGH)...
  3. WydD

    Extreme CPS2 Battery Damage Repair - ROUND 3!

    Glad my work for the reverse was useful! You've done an amazing job! The ~REFRESH signal is transmitted to the main work+video DRAM to perform its refresh cycle. So, nothing really concerning video display at first glance. However, there is one synchronisation point inside the DL-1827 which...
  4. WydD

    ZN2 Conversion and CAT702 reproduction [Taito GNet / Capcom Sony ZN]

    Heyo all, I just published all the files of this project. They are publically available in this repository https://gitlab.com/loic.petit/cat702 You will find: FPGA source PCB design and schematics Software experiments and test checks Enjoy.
  5. WydD

    ZN2 Conversion and CAT702 reproduction [Taito GNet / Capcom Sony ZN]

    Ermm nope, I never touched a hard disk controller, why do you ask :D
  6. WydD

    ZN2 Conversion and CAT702 reproduction [Taito GNet / Capcom Sony ZN]

    I was just doing research on my own like I usually do, and took the opportunity for me to learn more about this system and FPGAs, that's all.
  7. WydD

    ZN2 Conversion and CAT702 reproduction [Taito GNet / Capcom Sony ZN]

    @Hammy yep I know, it's really impressive btw :) I just thought it would be a nice project to try this way and provide an alternative way to enable other multi designs. ^^
  8. WydD

    ZN2 Conversion and CAT702 reproduction [Taito GNet / Capcom Sony ZN]

    Hey everyone, Lately I've worked on the CAT702 security chip on ZN systems in order to perform a ZN2 conversion (EX2 -> Tetris TGM). And today I've managed to succeed. This is a picture of my current ultra-janky-af-breadboard implementation and a proof that the game is actually running in the...
  9. WydD

    CPS QSound Amp Reverse Engineering

    Agreed, the only one weird thing that I don't understand: there is a feedback loop using the 0.1 ohm resistor. I'm not sure how it impacts the rest.
  10. WydD

    CPS QSound Amp Reverse Engineering

    Yes I saw those. At first I wondered if it was an official alteration or just a mod done :P I'll add a note to the schematics.
  11. WydD

    Capcom Q-Sound amp help?

    FYI I created a dedicated thread on the topic: CPS QSound Amp Reverse Engineering The values have been filled now :)
  12. WydD

    CPS QSound Amp Reverse Engineering

    Oh yeah! Thank you so much. <3 Small correction though. When you say 104nF for C40 for instance, it's actually 100nF. The way it's noted on the component is "104" which means "10 with 4 zeros pF" meaning 100nF. See here I'm assuming this is the case for C10-C13, C16-C17, C38-C41. I'll start...
  13. WydD

    CPS QSound Amp Reverse Engineering

    Heyo, As kind of a follow-up of this thread Capcom Q-Sound amp help? and the interesting research around it. I decided to make a complete schematics of the CPB-001A QSound Amplifier used on CPS1.5-2-3. You can explore the schematics here I don't own one so I did most of the reverse...
  14. WydD

    DL-0921 / CPS-B-21 Reverse Engineering

    69 pages... ~2000 components but a lot of them are compound gates (like 8 bit shift registers and such)... ~10000 wires (depending on how you count) Yep, the schematics are provided as CC-BY, basically a long as you don't steal the credits I'm fine with it. And to everyone who is inspired by...
  15. WydD

    DL-0921 / CPS-B-21 Reverse Engineering

    Glad you like it :) I'm eager to see what the FPGA and emulation people will make of this!
  16. WydD

    DL-0921 / CPS-B-21 Reverse Engineering

    Heyo! I'm very pleased to share to the community my work on the CPS-B-21. I have spent months analysing the die shot of this chip and I've produced a complete documentation and schematics. Here's the overview image of the schematics You can access the complete documentation here (and the...
  17. WydD

    CPS2 B-Board Complete Wiring List

    Hello everyone, I've lurked here for some time and here's my contribution now, While looking for a broken trace on a CPS2 with graphical glitches. I followed a bunch of wires on the PCB. In the end, I noted them all (~850 traces) and you can consult the document here. CPS2 B-Board Wiring...
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