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10a054d60c
Re-implemented Hardware ISR (INT0/INT1): Restored interrupt-driven pulse counting to eliminate polling jitter. Tests confirmed that at 16MHz, software polling is too inconsistent for reliable DATA OVERDRIVE synchronization. Mechanism Freeze: The core logic (Stabilization -> Silence Detection -> ISR Counting -> Injection) is now finalized and stable. Portability Note: Maintained a clean structure to allow future non-ISR porting, although the ISR version remains the mandatory standard for ATmega328P @ 16MHz performance.
PSNee V8.7
THE modechip supports the largest number of Playstation 1 variants, and the largest number of microcontrollers
For all useful information consult the 
Features
- Remove Disk Region Protection
- Patch BIOS
- A specific library for card support, to solve the fuse setting problem.
- The mode does not take care of changing PAL <-> NTSC video output (in other words if you use a Japanese console and you put European games, or in older European models you use American or Japanese games... the display will not be correct)
Supported Playstation 1
All US models, all European models, and the vast majority of Japanese models.
Supported platforms
- ATmega328(A/P/PA) @16Mhz
- ATmega168(A/P/PA) @16Mhz
- Atmega32U4 @16Mhz
- ATtiny25/45/85 @8Mhz no BIOS patch!
Model that I personally tested
Example of gray image
