Anybody who could help on solving some of the various questions marks and other unclear details?

Here are my own modding notes (tested on a PAL PSone, should be same for SCPH-7500): Composite NTSC/PAL Mod /PAL (IC502.13) --/cut/-- /PAL (GPU.157) /PAL (IC502.13) --------- GND (for PAL) or VCC (for NTSC) This forces the console to be always producing the desired composite color format (regardless...

Here's another PCB (photo taken by Charles MacDonald, some of the below PIC notes and schematics are from Charles, too): http://www.psxdev.net/forum/download/file.php?id=300 Interestingly, this thing contains an 28pin PIC16C55 microprocessor. The GameShark Pro V3 photo from Type 79 does also seem to...

When searching info about Xplorer and ActionReplay code formats, I've come across this webpage: http://gamehacking.org/wiki/Code_Types_(Playstation) , which saying this: Caetla The only known documentation of the code types for this device are at the following links: http://web.archive.org/web/20001...

Here are my current findings about Datel's ActionReplay / GameShark PSX Cheat Code format: PSX Gameshark Code Format 30xxxxxx 00dd ;-8bit Write [aaaaaa]=dd 80aaaaaa dddd ;-16bit Write [aaaaaa]=dddd Below for v2.2 and up only D0aaaaaa dddd ;-16bit/Equal If dddd=[aaaaaa] then (exec next code) D1aaaaaa...

I am trying to compile a list with info on the Xplorer Cheat Code Format, based on these docs: http://gamehacking.org/faqs/hackv500c.html - cheat code formats http://doc.kodewerx.org/hacking_psx.html - cheat code formats http://gamehacking.org/wiki/Code_Types_(Playstation) - cheat code formats This ...

Yes, 78L05 Great, thanks. 0.22ohm, power to DB25 Pin15 Okay, that would be the /ERROR input on the PC printer port (but the actual purpose is probably supply input on X-Assist device). 470k resistors Oh, on the photos it looked like 0 ohm (with a black ring). But with your edited schematic it's qui...

Great to see that xploder.pdf file with schematic and memory map, thanks for uploading it! I've compared it with the three PCB versions - see here for PCB photos: http://www.psxdev.net/forum/viewtopic.php?f=54&t=81 - that leaves some questions: What is the 3pin transistor-like thing? Is that a 7...

Duh, yes, you are right. Thanks. The thing happened to me is that Opera has replaced .BIN by .ZIP when downloading the file (it's sometimes doing that stuff, some years ago it got me .JPGs width .PDF extension). It makes me feeling like an idiot : - )

Thanks for the ROM collection! I wasn't able to unzip the CAEFLASH.zip file and CAETLA30..38.zip's. Either that 10 files are corrupt, or I was doing something wrong. Did anybody else have that problem, too? Or got them unzipped okay?

I've just noticed that there are some special dithering cases. For example, monochrome LINEs are dithered, but monochrome POLYGONs aren't (and emulated & described it in the new no$psx v1.7 and psx-spx.htm updates at http://nocash.emubase.de/psx.htm ). Alongsides, when searching for psx+dither, ...

Are the XA-compression tools supporting 8bit ADPCM samples, and emphasis? Most (or maybe all) existing PSX games are using 4bit ADPCM without emphasis, but those 8bit & emphasis features can be enabled in the codinginfo byte (in the cdrom sector's subheader), and the PSX hardware does actually s...

The PU-8 mainboards (SCPH-1000) have a 7pin power supply connector (unlike later boards with 5pin connectors). One of the extra pins is just another GND pin. The other one is +3.5V standby, ie. that pin is powered even when the console is switched off. What is THAT for? From what I can see (when gaz...

I have been doing some hardware tests on a PSone to find out how many sectors the console can hold in its sector buffer. The result is a bit puzzling: It seems to be able to hold up to EIGHT sectors, BUT: it allows to access only TWO of those sectors. The other sectors are lost - they appear to be i...

Hi, I've released a new playstation document. It's trying to give complete specs on cpu, gpu, gte, audio, cdrom, joypads, mice, lightguns, bios, and everything I could think of. http://nocash.emubase.de/psx-spx.htm - html version http://nocash.emubase.de/psx-spx.txt - text version I hope it'll be us...