ROM Hack Is there a Genesis/MD VC injection method

[ArtemisM]

Just kind of wondering. I've heard snippets here and there about possibly injecting a ROM into the emulator they use for the 3D genesis/MD games

 

[RocketRobz]

Yes, it's possible, but unlike the nintendo VC roms, the Genesis/MD and GameGear roms are mdf compressed, and have to be decompressed via mdfDecompressor from mdfTools (by Normatt), and to be renamed for them to work. I think injection works best if it's on 3D Sonic 2.

 

[ArtemisM]

Yes, it's possible, but unlike the nintendo VC roms, the Genesis/MD and GameGear roms are mdf compressed, and have to be decompressed via mdfDecompressor from mdfTools (by Normatt), and to be renamed for them to work. I think injection works best if it's on 3D Sonic 2.

Is there a guide and/or a tool to help with the injection? Or is it ye olde disassembling/reassembling the CIA?

 

[RocketRobz]

Is there a guide and/or a tool to help with the injection? Or is it ye olde disassembling/reassembling the CIA?

No CIA needed.
The romfs of the game (3D Sonic 2, in this case) can be dumped through braindump, and then extracted with RomFS Extractor. Then go into "_romfs\system\roms", and place 2 files which is the same compressed rom in the folder, and call them "Sonic2.SGD.m" and "Sonic2_USA.SGD.m".
Use RomFS Builder to build the romfs file, and call it "gameid.romfs", then copy it to "SDcard:\hans\". Open up Homebrew Launcher, then load 3D Sonic 2 through HANS, set romfs to "YES", then choose "OK".

 

[ArtemisM]

Heck yeah, thanks! Wanting to make a Warsong inject