PlayStation Development Network

hi guys
any asm source around to toy with the psOne & playstation1 SIO-uart port which does not use the BIOS at all ? I mean something that access directly the SIO registers.

I am planning to remove the psx's bios replacing the firmware with a bareboard piece of code, so the SIO will be my std-IO for the console.

You can check my SIO lib. It's not asm but it will get you in the right direction.

thank you, it is really appreciated cause it is very very important for the goal i am aiming for