emulateur

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You will find on this page all the genesis emulators that I had listed, some aren't finished and simulate not completly the genesis hardware. You will also find on my own genesis emulator : GENS. It's now works under win9X.
Go to the Gens Page :

Here is the specifications of the genesis :

GENERAL:

* 68000 @ 8 MHz (Main CPU)
- 4 MBytes ROM area
- 64 KBytes RAM area
* VDP (Video Display Processor)
- Controls playfield & sprites
- Capable of DMA
- Horizontal & Vertical interrupts
- 64 KByte of dedicated VRAM (Video RAM)
- 64 x 9-bits of CRAM (Color RAM)
* Z80 @ 4 MHz (Sound Processor)
- Controls PSG (Programmable Sound Generator)
- 8 KBytes of dedicated sound RAM

VIDEO:

NOTE: Playfield and Sprites are character-based
* Display Area (visual)
- 40 chars wide x 28 chars high
- Each char is 8 x 8 pixels
- Pixel resolution is 320 x 224 (NTSC)
- 3 planes
- 2 scrolling playfields
- 1 sprite plane
- Definable priorities between planes
* Playfields: each char position takes 2 bytes, that includes:
- Char name (10 bits): points to char definition
- Horizontal flip
- Vertical flip
- Color palette (2 bits): index into CRAM
- Priority
- Scrolling
- 1 pixel scrolling resolution
* Horizontal : whole playfield as unit
- Each character line
- Each scan line
* Vertical : whole playfield as unit
- 2 char wide columns
* Sprites
- 1 x 1 char up to 4 x 4 chars
- Up to 80 sprites can be defined
- Up to 20 sprites displayed on a scan line
- Sprite priorities
* Character definitions
- 4 bits/pixel; points to color register
- 4 bytes/scanline of char
- 32 bytes for complete char definition
Playfield & sprite chars are the same!

COLOR:

* Uses CRAM (part of the VDP)
* 64 9-bit wide color registers
* 3 bits of Red •3 bits of Green •3 bits of Blue
* 4 palettes of 16 colors
* 0th color (of each palette) is always transparent

OTHER:

* DMA
- Removes the 68000 from the BUS
- Can move 205 bytes/scanline during VBLANK
- There are 36 scanlines during VBLANK
- DMA can move 7380 bytes during VBLANK
* Horizontal & Vertical interrupts

SOUND:

* Z80 controls
* PSG chip (TI 76489)
* FM chip (Yamaha YM 2612)
- 6-channel stereo
* Z80 can access ROM data
* 8 KByte RAM

Here is a table where are the different genesis emulators with a description for each,of course, it's possible that these descriptions to be wrong because I can't test all correctly these emulators !
But if you think that there is an important mistake that deserves correct, just send me a mail and I will correct it.

emulator name	sound emulation	Rasters effects that working	percentage of working roms	OS	Comments	Version Number
Megasis	well	nearly all	75	WIN9X	very slow	v0.03
Dgen	very good	a lot of	85	WIN9X	a lot of options, under development	v1.21
St0rm	absent	a little of	30	DOS	68000 core too bugged	v0.013a
GenEm	??? where is	some	60	DOS	miss the window plan in VDP	v0.19b
Gennew	??? where is	some	60	DOS	optimized version of GenEm	v0.19b
VGen	not good	nothing	30	DOS	not very well and brief VDP emulation !	v0.014b
Megadrive	nothing	nothing too	1	DOS	just some demos roms works, It's the first genesis emulator (1994) !	v0.0.5
Generator 32	absent	most	40	WIN9X	conversion de generator linux under WIN9X	v0.03
Genem 95	do you hear anything ?	same as genem	60	WIN9X	conversion de genem under WIN9X	v0.19b
Kgen	well	a lot of	85	DOS	fast	v0.21b
Kgen98	very good	nearly all	90	DOS	the best with genecyst	v0.4b
Genecyst	very good	a lot of	88	DOS	a nice GUI with a lot of options and the faster genesis emulator	vx.xx
Gens	very good !	nearly all	75	WIN9X	It's MINE !!	v0.34

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