using ATMEL ATMega8515 microcontroller. The development kit is STK500, bought
from digikey.com for $79. The compiler is CodeVisionAVR C compiler, costed
$199 for one license and bot it many years ago.
The PS2 controller protocol related information is found on: http://www.gamesx.com/controldata/psxcont/psxcont.htm . Also google is very
helpful, got some inside information after a long search. https://playstation2-linux.com/forum has a hardware/software board. They are
very useful too. People at
