Difference between revisions of "GenEm"

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'''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 (emulator)|Megadrive]]. Both versions are extremely buggy in terms of speed.
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{{EmuBob
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| bobscreen=GenEm.png
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| system=[[Sega Mega Drive]]
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| os=DOS, Windows, Linux, ''PowerPC''
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| developer=Markus Gietzen; Brian Verre (PowerPC)
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| language=Assembly, C
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| date=1997-05-20{{ref|https://www.zophar.net/genesis/genem.html}}
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| version=0.19
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}}
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'''GenEm''' is a [[Sega Mega Drive]] emulator for DOS and Windows 9x programmed in 1996 and 1997 by Markus Gietzen. It's the second Mega Drive emulator released (the first one being [[Megadrive Emulator]]), and as such, has speed issues. A Linux version was released under the name '''XGenEm''', which was based upon the (unreleased?) DOS version 0.21 source code. GenEm was ported to PowerPC computers by Brian Verre.
  
==DOS Version==
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==DOS version==
[[image:GenEm.png|thumb|right|GenEm running [[Sonic 1 Remastered]]]]
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The DOS version was the first emulator to feature (preliminary) 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 most games) must use the -z80 switch. The DAC emulation is, however, extremely buggy and slow.
  
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).
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It comes with 2 executables.
  
It comes with 2 executables.
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* GENEM.EXE (older, slower but stable 68000-core written in C)
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* GENNEW.EXE (newer but experimental 68000-core written entirely in assembler)
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==Windows version==
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The Windows version seems to lack sound emulation, even though there is an option to enable the Z80. Timing is CPU-dependent and consequently will run too fast on newer computers.
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==Downloads==
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{{multidownload
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| file1=GenEm v0.19 win.7z
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| filename1=0.19 for Windows
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| file2=Xgenem0.11.7z
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| filename2=0.11 for Linux
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}}
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===Old versions===
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* {{file|GenEm old versions.7z|GenEm for DOS versions}}
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** GenEm version 0.12 PUBLIC BETA (1996-09-05)
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** GenEm version 0.15 PUBLIC BETA (1996-09-25)
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** GenEm version 0.17 PUBLIC BETA (1996-11-16)
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** GenEm version 0.19 (1997-05-18)
  
* GENEM.EXE (Older, slower but stable 68000-core written in C)
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===Third-party versions===
* GENNEW.EXE (Newer but experimental 68000-core written entirely in assembler)
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* PowerPC: {{file|GenEmPPC.7z|Versions 0.20.1b2, 0.20.2}}
  
==Windows Version==
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==External links==
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.
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* [http://stud.uni-sb.de/~magi/ Official website] (offline)
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* [http://web.archive.org/web/20011004104944/http://www.execpc.com/~wverre/genem.html PowerPC version website] (archive)
  
[[Category:Mega Drive Emulators]]
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==References==
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<references/>

Latest revision as of 12:57, 3 October 2017

Video game console emulator

GenEm.png
GenEm
System(s): Sega Mega Drive
OS: DOS, Windows, Linux, PowerPC
Developer: Markus Gietzen; Brian Verre (PowerPC)
Programmed in: Assembly, C
Last release date: (26 years ago)
Last version: 0.19

GenEm is a Sega Mega Drive emulator for DOS and Windows 9x programmed in 1996 and 1997 by Markus Gietzen. It's the second Mega Drive emulator released (the first one being Megadrive Emulator), and as such, has speed issues. A Linux version was released under the name XGenEm, which was based upon the (unreleased?) DOS version 0.21 source code. GenEm was ported to PowerPC computers by Brian Verre.

DOS version

The DOS version was the first emulator to feature (preliminary) 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 most games) must use the -z80 switch. The DAC emulation is, however, extremely buggy and slow.

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

The Windows version seems to lack sound emulation, even though there is an option to enable the Z80. Timing is CPU-dependent and consequently will run too fast on newer computers.

Downloads

Download.svg

Download GenEm
Multiple downloads available

0.11 for Linux (131 kB) (info)

Old versions

  • GenEm for DOS versions (info) (966 kB)
    • GenEm version 0.12 PUBLIC BETA (1996-09-05)
    • GenEm version 0.15 PUBLIC BETA (1996-09-25)
    • GenEm version 0.17 PUBLIC BETA (1996-11-16)
    • GenEm version 0.19 (1997-05-18)

Third-party versions

External links

References