snakemar / megadriveplusplus Goto Github PK

MegaDrive++ is a modchip for the Sega Mega Drive (AKA Sega Genesis). It has the following features:

• EUR/USA/JAP mode switching: this effectively makes your console universal, allowing it to bypass region checks and to run all games without resorting to an adapter.
  • If you come from a PAL region, you will also be able to run most games at 60 Hz, which means full-speed and full-screen! Get rid of those black bars! See the difference here!
  • The mod is switchless, so you don't need to modify the aesthetics of your console installing ugly switches, but rather you will be able to change the region:
    • Through the Reset button: Keep pushed to cycle through modes.
    • From the Player 1 controller pad: Press Start + B + Up/Down to cycle through modes or Start + Down/Left/Right to set a certain mode (according to the actual chip you have installed, more on this below).
  • The last used mode is saved automatically after 5 seconds and reused at power up.
  • Supports a single led, common-anode or common-cathode dual or RGB LEDs to indicate the current mode (Colors can be set to any value when PWM pins are available).
• Reset-From-Pad (AKA In-Game-Reset AKA IGR): Press Start + A + B + C.
  • Supports consoles with both active-high and active-low reset signals by autosensing (i.e.: all console revisions!).
• Uses cheap Atmel AVR microcontrollers.
  • Can be flashed on different chips (ATtiny's, ATmega's, or even a full Arduino board), but please note that not all features are supported on all chips, depending on the number of available I/O pins, please read on for details.
  • If flashed on an ATtinyX4(A), it is pin-to-pin compatibile with the D4s/Seb mod.
• Even though default settings are recommended, everything can be customized to taste.
• Uses the popular Arduino environment, allowing for easy development, testing and modifications.
• Last but not least, it is Open Source and Free Software!

If you are interested in modding your console with MegaDrive++, please head to the wiki. There you will find full instructions about what chip to buy, how to put MegaDrive++ on it and how to install it, with a full wiring guide for a few different Mega Drive/Genesis models that were sold.