SPU Soft Reset If and as long as SPUCNT.bit15=0: All voices are Keyed Off, writes to Key On are ignored, and all voices are forced to ADSR volume=0000h. That is about same as FLG.bit7 on SNES APU (with big thanks to Anomie for rev-engineering the SNES hardware). Unstable 32bit SPU Writes One long-s...

Is there any documentation for the SQ BD HD format used on PS2 ?

I am using cable boot, anyone else knows more about cdrom booting.
Gameshark cdrom might work, too. Although when saying exploitable game disc, I did of course mean a game disc, not that gameshark disc.

It's all working. And can differ on comfort, speed, capacity. Without any soldering, you would need an exploitable game disc, and burn a bootloader to memory card. If you store your game/exe on memcard, too, then it could be max 100 Kbytes. I'd expect that each boot takes about 30 seconds (depending...

With or without soldering?

All psx sectors are MODE2 sectors, which are usually 930h bytes tall, and contain only 800h bytes of data (or more for audio sectors). So you need to slice your TMD file into 800h byte snippets, and insert those at the correct location in the 930h byte sectors. And then fix the ECC/EDC in the remain...

Thanks -- if I may clarify, what am I looking for, or what am I looking at? Yes, what did you do exactly, and did you run into any specific problems? As by now, your question is a bit unclear. ISO is slang that might refer to "the cdrom filesystem" or "the whole disc image" or &...

One MAX232 chip should work fine for RX, TX, RTS, CTS. I don't know if RTS and CTS are needed or not, but it would be crazy not to connect them as the MAX232 has enough spare pins for that. DTR and DSR are probably not needed (or if they are: You can wire them to "always ready" state, so y...

The same timing problem than what? Nobody mentioned any timing problems. Anyways, the timing problems I could think of: Vblank accuracy is approx +/-0.001 minutes, but I doubt that even audiophiles could hear differences between 119.999 bpm and 120.001 bpm. PAL vs NTSC have different vblank timings....

Cool. Depending on what hardware you have, it might easier/faster to just check if the CRC32 of the BIOS memory does match up with known dumps. For example, in this tool http://www.problemkaputt.de/psx-diag.htm select "General Tests", and it'll compute the CRC32 and display it on the TV sc...

Thanks for the part numbers, I have added them to the http://www.psxdev.net/forum/viewtopic.php?f=70&t=1065 thread

Okay, I've never tried to buy old chips myself, but there seem to be tons of sites offering that stuff. I don't know how reliable they are, but "can't find" is a bit of a surprise... if that happens, I would try a different search engine, and be sure to include world-wide search results, i...

Sounds as if you didn't read this, http://www.psxdev.net/forum/viewtopic.php?p=5457#p5457
Or is it some google-that-for-me-but-I-won't-buy-used-parts request?

The quote has two things, none of it being of greater importance. There's some half-serious "winner or loser" attitude in there, which may be encouraging to some, and discouraging to other people. Apart from the harsh language, it was just saying that they did have tools that were easy to ...

I think I misunderstood the meaning behind Bill's quote Looks so. If you still don't understand it: Just give up, you won't understand it no matter what. (That's about what that Will or Bill was trying to say. Perhaps a bit rude, but I guess it's been meant to be a simple, clear, and reasonable adv...

Thank you! Yes, I think I can imagine why you are considering the TSQ files as not very interesting ; ) I've only got into that stuff because I was wondering what they were talking about in the file formats doc (and especially, my file system viewer did often mis-detect random binaries as possible T...

Only TSQ files i've ever heard of are Takara's custom sequence format used by Choro Q Wonderful! . Yeah, that's something else, those TSQ/TVB files seem to be some equivalent to SEQ/VAB audio. I know capcom tested them, maybe used them, it's in the tron bonne leak Cool, that looks right, with all t...

Does anybody have TSQ files? According to Sony's file formats document, they would contain data for "2D Animation Time Sequences", but I have never seen such files for real. If you can find one - anywhere in retail games, homebrews, programming examples, demos, whatever - please let me know!

I'm a little confused on exactly how to utilize what I'm seeing! :D Why? Just run the diag.exe in emulators and check if the ADSR graphs are looking right. I haven't tried that, but it would be interesting if the four SPU emulations that you had posted above are actually producing different ADSR gr...

I've converted the bios boot gui to EXE format and replaced the cdrom sector loading functions by a fixed logo and licence strings... so I could upload the EXE to the broken console without cdrom drive attached... doing that, it's now capable of properly displaying "Licensed by". Then, whi...