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# PSNee V9.0
This modchip supports the widest range of PlayStation 1 models and the largest variety of microcontrollers.
PSNee is compatible with all retail PlayStation 1 models and various AVR microcontrollers.
#For all useful information, please consult the [Wiki](https://github.com/kalymos/PsNee/wiki).
## For all useful information, please consult the [Wiki](https://github.com).
![Logo](/images/PSNee-9.0-logo.png)
## Features
- Removes Disc Region Protection.
- BIOS Patching.
- Specific library for board support to solve fuse setting issues.
- **Disc Region Protection:** Removes region locks.
- **BIOS Patching:** Provides enhanced compatibility (except on ATtiny).
- **Board Support:** Custom manager to simplify fuse settings and hardware configuration.
> [!IMPORTANT]
> **Video Signal Note:** This modchip does not handle PAL/NTSC video signal conversion. Playing games from a different region may result in an incorrect display (e.g., NTSC games on early PAL consoles, or PAL games on NTSC-U/C or NTSC-J consoles).
>
> *Note: European models from SCPH-7002 onwards typically handle NTSC signals correctly without display issues, but SCPH-102 requires a BIOS patch.*
> *European models from **SCPH-7002 onwards** typically handle NTSC signals correctly. However, **SCPH-102** requires a BIOS patch to support it.*
>
> See the **NTSC/PAL Display Mismatch** example at the bottom of the page.
> See the Example of a distorted image at the bottom of the page.
## Supported PlayStation 1
All models are supported.
## Supported Platforms
- ATmega328(A/P/PA) @16MHz
- ATmega168(A/P/PA) @16MHz
- ATmega32U4 @16MHz
- ATtiny25/45/85 @8MHz (Note: No BIOS patch support!)
## Supported Hardware (AVR)
- **ATmega328(A/P/PA)** @16MHz
- **ATmega168(A/P/PA)** @16MHz
- **ATmega32U4** @16MHz
- **ATtiny25/45/85** @8MHz *(Note: No BIOS patch support!)*
> [!CAUTION]
> **BIOS Patching:** PB-series (328PB/128PB) is currently unoptimized.
> For stable BIOS patching, please use A/P/PA or 32U4 variants.
> **BIOS Patching:** Timing for **PB-series** (328PB/128PB) is currently unoptimized. For stable BIOS patching, please use A/P/PA or 32U4 variants.
### NTSC/PAL Display Mismatch
---
Typical result when playing a game from a different region without a signal converter.
![gray](https://github.com/kalymos/PsNee/blob/master/images/issue/gray-screens.png)
### Example of a distorted image
*Typical result when playing a game from a different region without a signal converter.*
![gray](images/issue/gray-screens.png)
### Verified Hardware (Personal Test Collection)
![test](images/test-mat.png)
From left to right: NTSC-J, PAL, and NTSC-U/C & Asia models.
*From left to right: NTSC-J, PAL, and NTSC-U/C & Asia models.*