GenEm

GenEm is a Sega Mega Drive / Genesis emulator for MS-DOS and Windows 9X programmed in 1996 and 1997 by Markus Gietzen. It's the second try to emulate the Genesis in history of emulation (the first one being Megadrive. Both versions are extremely buggy in terms of speed.

DOS-Version

The DOS Version was the first emulator to feature (prelimilary) sound emulation, although the YM2612 isn't exactly emulated. The emulator tries (and 95% of the times fails) to convert the voices, commands, etc. to the format of the OPL3-chip used on various Sound-Blaster cards. If you have any other sound card, it won't give you FM-sound. Additionally, although Z80 emulation is present, players must activate it with a switch in command prompt (-z80 or for fake emulation -fakez80). Games which require Z80 emulation to work properly (for example Sonic 2 or newer, which have the sound driver on z80, or DAC samples in any game) must use the -z80 switch. The DAC emulation is broken (samples lag and cause the emulator to run slower).

It comes with 2 executables.

• GENEM.EXE (Older, slower but stable 68000-core written in C)
• GENNEW.EXE (Newer but experimental 68000-core written entirely in assembler)

Windows-Version

In the Windows version the sound emulation seems to be not working (no sound at all), even though there is an option to enable Z80. This emulator does not run on any NT-based windows system. It has no automatic speed control and on most of the computers it runs too fast.