Q: What is the asm used in the PSX?
A: The PSX is equipped with a MIPS r3000. This processor is little endian, so
   don't you worry if you know SNES or PC hacking.
   
   I've found a tech-doc about the processor here:
      http://psx.rules.org/system.txt


Q: What is your full bookmark about PSX developpment?
A: http://www.psxdev.ip3.com/
   http://psxdev.de/
   http://psx.rules.org/
   http://www.geocities.co.jp/Playtown/2004/psx/ny_e.htm
   http://www.upl.cs.wisc.edu/~hamblin/psxdev.html
   http://www.gamefreax.de/cgi-bin/gamefreax/tools.pl?function=showfiles&system=Playstation%201
   http://phatt.hn.org/nitrous/psxutils.htm
   http://www.geocities.com/SiliconValley/Pines/6131/psxprog.html
   http://home.hiwaay.net/~jfrohwei/home.html
   http://www.flyonthenet.it/net/psx_faq.htm