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mirror of https://github.com/kalymos/PsNee.git synced 2026-02-28 01:17:16 +00:00
kalymos f7bf40ea6b refactor: optimize BIOS patching sequence with refined timing nomenclature
Refined the BIOS patching and standardized
timing nomenclature for better technical clarity.

Changes:
- Ad technical documentation within the code.
- Standardized timing variables for better clarity:
    - BOOT_OFFSET: Replaces initial checkpoint.
    - FOLLOWUP_OFFSET: Replaces initial checkpoint2.
    - PULSE_COUNT: Replaces trigger .
    - BIT_OFFSET: Replaces hold .
    - OVERRIDE: Replaces patching.
2026-02-12 18:49:02 +01:00
2025-03-09 19:47:20 +01:00
2025-03-09 19:47:20 +01:00
2025-03-19 09:03:11 +01:00
2025-04-21 12:32:38 +02:00

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 Wiki

Logo

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

test Example of gray image
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Description
PsNee, an open source stealth modchip for the Sony Playstation 1
Readme Unlicense 243 MiB
Languages
C 86.8%
C++ 13.2%