Search found 10 matches

by clavicus
July 1st, 2017, 5:26 am
Forum: Hardware
Topic: Getting best possible RGB picture out of PS1
Replies: 52
Views: 88215

Re: Getting best possible RGB picture out of PS1

There is a tutorial for a digital sound mod somewhere on this forum. I believe it only works up to a certain board revision though. Anyway, sound seems very afterthought'y to me. Picture is the awesome stuff :p Update: Not only digital out, but also digital in! (What? Why? I don't know!) http://hit...
by clavicus
June 28th, 2017, 4:40 pm
Forum: Hardware
Topic: Getting best possible RGB picture out of PS1
Replies: 52
Views: 88215

Re: Getting best possible RGB picture out of PS1

Nope DATO just won't budge, perhaps it can be enabled somehow? Seems strange that it would be hardware disabled, it even has its own test pad. I'll work on video for now at least.
by clavicus
June 28th, 2017, 7:39 am
Forum: Hardware
Topic: Getting best possible RGB picture out of PS1
Replies: 52
Views: 88215

Re: Getting best possible RGB picture out of PS1

I think I was wrong about DOUT, seems to be part of the CD DSP. I'll try poking around with DATO again as it's the name given to the pin that's responsible for sending the bitstream to the DAC in the 5500 series and earlier, it has to be that but I sure hope it's functional somehow, otherwise digita...
by clavicus
June 25th, 2017, 7:56 am
Forum: Hardware
Topic: Getting best possible RGB picture out of PS1
Replies: 52
Views: 88215

Re: Getting best possible RGB picture out of PS1

Yeah that will definitely work for testing, but I don't even have any code ready right now. As soon as I get at least the video working I'll share the code.
by clavicus
June 25th, 2017, 4:00 am
Forum: Hardware
Topic: Getting best possible RGB picture out of PS1
Replies: 52
Views: 88215

Re: Getting best possible RGB picture out of PS1

That will depend on your soldering skills, if and when this is complete it will need 30+ wires, with at least one needing to be soldered directly to an SPU pin unless I can find an alternative. You'll also need to consider that FPGA dev boards with HDMI aren't super-cheap at $50-ish.
by clavicus
June 25th, 2017, 3:30 am
Forum: Hardware
Topic: Getting best possible RGB picture out of PS1
Replies: 52
Views: 88215

Re: Getting best possible RGB picture out of PS1

All's good, I didn't have my cheapo chinese analyser sampling frequency high enough :roll: It can't handle 24 MS/S for very long so I usually keep it lower. Booted an NTSC game and get 6.639 MHz which is correct. If my hunch is right about the audio bitstream then I have everything I need...in theor...
by clavicus
June 24th, 2017, 8:41 pm
Forum: Hardware
Topic: Getting best possible RGB picture out of PS1
Replies: 52
Views: 88215

Re: Getting best possible RGB picture out of PS1

I'm actually having a stab at making an HDMI mod for the ps1, while I'm waiting for my minispartan3 to arrive I hooked up a logic analyser to the GPU and SPU to get a better picture, and I already have some issues: I'm measuring 2.706 MHz for PAL and 1.357 MHz for NTSC for the pixel clock via pin 19...
by clavicus
June 16th, 2017, 2:32 am
Forum: Input/Output
Topic: Controller port pins poor contact
Replies: 1
Views: 5642

Re: Controller port pins poor contact

I had a good look and nothing seemed out of the ordinary really, so I rubbed a needle through each of the pin sockets and lightly sanded the controller pins and that seems to have fixed the contact issues. I'm guessing pin 5 (vcc) was the culprit, as I could only see the signals coming from the CPU ...
by clavicus
June 11th, 2017, 2:00 am
Forum: Input/Output
Topic: Controller port pins poor contact
Replies: 1
Views: 5642

Controller port pins poor contact

After much haranguing with a controller port that refused to work, I found the problem was much simpler than expected, in that the pins of the controller are simply no longer making proper contact with the pin sockets in the port. By wiggling the controller plug around I can get things working, but ...
by clavicus
June 6th, 2017, 9:38 pm
Forum: Research
Topic: Reverse Engineering the PSX Copy Protection (Wobble Groove)
Replies: 43
Views: 72471

Re: Reverse Engineering the PSX Copy Protection (Wobble Groo

You might be interested in knowing that the Biohazard 15th anniversary box comes with pressed discs of Resident Evil 1-3 which don't feature the black coating. Not sure if it would help in their case.