https://github.com/pcm720/mdpp-r

MegaDrive++ R is a universal modchip for SEGA Mega Drive/Genesis that supports language switching, 50/60 Hz switching and in-game reset (IGR) using Mega Drive Control Pad
https://github.com/pcm720/mdpp-r

genesis igr mega-drive megadrive modchip retrogaming sega sega-genesis sega-mega-drive sega-megadrive

Last synced: about 1 month ago
JSON representation

MegaDrive++ R is a universal modchip for SEGA Mega Drive/Genesis that supports language switching, 50/60 Hz switching and in-game reset (IGR) using Mega Drive Control Pad

• Host: GitHub
• URL: https://github.com/pcm720/mdpp-r
• Owner: pcm720
• License: gpl-3.0
• Created: 2019-01-21T22:34:59.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2019-01-24T22:09:50.000Z (almost 6 years ago)
• Last Synced: 2024-09-09T01:39:28.824Z (4 months ago)
• Topics: genesis, igr, mega-drive, megadrive, modchip, retrogaming, sega, sega-genesis, sega-mega-drive, sega-megadrive
• Language: C
• Homepage:
• Size: 53.7 KB
• Stars: 6
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
## MegaDrive++ R

**MegaDrive++ R** is a modchip for the **Sega Mega Drive/Genesis** heavily inspired by [MegaDrive++ project](https://github.com/SukkoPera/MegaDrivePlusPlus/).

It uses cheap ATmega88PA microcontroller, [cheap PCB](https://oshpark.com/shared_projects/NskgzQ7B) and supports following features:

- **Region switching**: allows user to switch regions with a button combination on Player 1 controller or Reset button.

  - Hold **Left + Start + A** for two seconds to change region to USA, **Left + Start + B** to change region to Europe, and **Left + Start + C** to change region to Japan.

  - Hold **Right** instead of **Left** to change region **and** reset the console.

  - Hold **Left + Start + A + B + C** to save current region to memory and use it as default every time you turn on your console.

  - Hold the **Reset** button for more than four seconds to cycle through modes. This will reset the console.

  - Button combos can be customized in common.h.

- **In-game Reset**: hold **Start + A + B + C** to reset the console.

- Dual-frequency oscillator support: PCB has a special pin for DFO control.

- Unlike [MegaDrive++](https://github.com/SukkoPera/MegaDrivePlusPlus/), it doesn't support reset level autosensing, so to use it on boards with active-high reset signal you'll need to comment out a line in common.h. Note that this is untested: I don't own any consoles with active-high reset.

- Suggested PCB layout is optimized for Model 2 VA1 board.

Visit [wiki](https://github.com/pcm720/mdpp-r/wiki) for installation diagram for Model 2 VA1 board.