toying with the SIO

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legacy
Curious PSXDEV User
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Posts: 25
Joined: September 4th, 2013, 9:11 pm

toying with the SIO

Post by legacy » September 5th, 2013, 7:17 am

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.
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Shendo
C Programming Expert
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Posts: 238
Joined: March 21st, 2012, 4:34 am
I am a: Programmer
Motto: Never settle
PlayStation Model: SCPH-9002
Location: Croatia, EU

Re: toying with the SIO

Post by Shendo » September 5th, 2013, 8:36 am

You can check my SIO lib. It's not asm but it will get you in the right direction.
My PS1 consoles: 2 x SCPH-1002, SCPH-5552, SCPH-7002, 4x SCPH-9002, 2 x SCPH-102.
Dev console: SCPH-9002, MM3 - 7 wire modchip, PAL color mod, CH340 serial cable addon.
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legacy
Curious PSXDEV User
Curious PSXDEV User
Posts: 25
Joined: September 4th, 2013, 9:11 pm

Re: toying with the SIO

Post by legacy » September 5th, 2013, 8:52 am

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