New modchip full stealth, single wire BIOS patch PM41

General information to do with the PlayStation 1 Hardware. Including modchips, pinouts, rare or obscure development equipment, etc.
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L10N37
Curious PSXDEV User
Curious PSXDEV User
Posts: 15
Joined: Jun 17, 2021

New modchip full stealth, single wire BIOS patch PM41

Post by L10N37 » July 31st, 2021, 5:57 pm

I've made a new 4 wire stealth
No WFCK/ Gate wire for PU22 / PU23/ PM41

Full stealth on testing so far, stops spamming injection string at the perfect time
Just finishing up a single wire BIOS patch, I've had 5/6 perfect boots everytime on a variety of NTSC games

https://www.youtube.com/watch?v=fKqG3BlkdDY

L10N37
Curious PSXDEV User
Curious PSXDEV User
Posts: 15
Joined: Jun 17, 2021

Post by L10N37 » August 7th, 2021, 1:21 am

https://www.youtube.com/watch?v=Ahy8XMkAvQc

PM41 with single wire BIOS patch is finalised.

L10N37
Curious PSXDEV User
Curious PSXDEV User
Posts: 15
Joined: Jun 17, 2021

Post by L10N37 » August 21st, 2021, 2:43 am

https://github.com/L10N37/tehUberChip_A ... /PIC12F675

Now ported my PM41 UBER-D-D chip to raw assembly for PIC 12F675
This is with a single wire BIOS patch, and like my PU22/PU23 version, no gate wire required. One I/O Pin left to spare.

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