There are 1 repository under mega-cd topic.
This is an example project for loading and executing an MMD file as used in Sonic CD, and can be used as a basis for original Mega CD homebrew projects
Replacement SFX sound driver for Sonic CD, based on Sonic & Knuckles's driver
Sega Mega-CD gpu performance test
A save editor for Sonic CD for the Sega CD
A program for managing Sega CD save files