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Revision as of 08:04, 5 June 2012 by HydeWing (talk | contribs)
[Media:S8DS07.zip Download]

This is a SEGA Master System/Game Gear/SG-1000 emulator for the NDS, it can also play some Coleco games if you add it's Bios.

Check your roms here.


  • Most things you'd expect from an SMS emulator.
  • Except:
Correct sprite collision and overflow.
Speech samples.
YM2413 emulation.
EEPROM save for the few GG games that use it.


  1. Download and extract file, DIDL patch it (depend on flashcard).
  2. Create a "S8DS" directory either in the root of your card or in the data directory (eg h:\data\S8DS).
  3. Put games on flash card, max 512 games per folder (shouldn't be a problem if separate SMS, GG, SG & Coleco games into different folders).
Filenames must not be longer than 62 chars.
You can use zipped files (as long as they use the deflate compression).
The emulator should also recognise SMS games for SEGAs MegaTech arcade machine and 2 of the SG-1000 arcade games (using MAME zip files).


Access GUI - L+R (shoulder buttons) or by touching the screen.

Change tabs by pressing the L or R button.

Going to the left most tab exits the GUI.

Closing your DS puts the emulator in sleep mode.



Load Game:
Load State: Select which state you want to load.
Save State: Select if you want to overwrite an old state or create a new.
Save Settings:
Eject Game:
Power On/Off:
Reset Game:

Options: Controller:

Autofire: Select if you want autofire.
Controller: 2P control player 2.
Swap A/B: Swap which NDS button is mapped to which SMS/GG button.
Use X as Start: Map the NDS X button to the GG Start button.
Use Select as Reset: Map the NDS SELECT button to the SMS Reset button.
Use R as FastForward: Select turbo speed as long as R button is held.


Display: Here you can select if you want scaled or unscaled screenmode.
Scaling: Here you can select if you want flicker or barebones lineskip.
Gamma: Lets you change the gamma ("brightness").
Color: Lets you change the color.
GG Border: Lets you change between black, bordercolor and none.
Perfect sprites: Uses a bit more cpu but is worth it.
Disable background: Turn on/off background rendering.
Disable sprites: Turn on/off sprite rendering.


Region: Change the region of the SMS and video standard.
Machine: Here you can select the hardware, Auto should work for most games.
Bios Settings:
Use Bios: Here you can select if you want to use the selected BIOSes.
Select Export Bios: Browse for export bios.
Select Japanese Bios: Browse for japanese bios.
Select GameGear Bios: Browse for GameGear bios.
Select Coleco Bios: Browse for Coleco bios.
Fake spritecollision: Some games require this, Pit Fighter doesn't like it.


Speed: Switch between speed modes, can also be toggled with L+START.
Normal: Standard, 100% speed.
Fast: Double, 200% speed.
Max: Fastest, 400% speed.
Slowmo: Slow, 50% speed.
FPS_Meter: Toggle fps meter.
Autosleep: Change the autosleep time, also see Sleep. !!!DoesntWork!!!
Autoload state: Toggle Savestate autoloading.
Automagicaly load the savestate associated with the selected game.
Powersave 2nd Screen: If graphics/light should be turned off for the GUI screen when GUI is not active.
Emulator on Bottom: Select if top or bottom screen should be used for emulator, when GUI is active emulator screen is allways on top.

Known Issues

  • max 512 games per folder
  • must use deflate compression on .zip files
  • close the menu on the touchscreen after you load a game because the top screen is frozen and won't start the game until the menu is closed


V0.7 - 2010-01-16

  • Fixed Super Tetris & Frogger proto when machine is set to "Auto".
  • Fixed PGA Tour Golf (low bits of VDP Stat not zero).
  • Changed palette buffering to middle of screen.
  • Changed default scale mode to "Scale To Fit".

V0.6 - 2010-01-07

  • Added option to turn off 3D display.
  • Fixed color/saturation setting for SG/Coleco games.
  • Fixed some bogus handling of the 3D display mode.
  • Fixed "Perfect Sprites" mode, should now be used as default.
  • Changed startup values for VDP regs 0,1 & 10, might break something.
  • Changed sound renderer to be more correct.
  • Removed PAL timing for GG.

V0.5 - 2009-12-02

  • Added support for Coleco Vision.
  • Added keyboard support for SC-3000/SG-1000.
  • Added support for mode 3 graphics.
  • Added support for red/cyan glasses in SMS 3D games.
  • Added color/saturation setting to display.
  • Fixed issues with mode 0,1 & 2 graphics.
  • Fixed cut off of long filenames in the browser.
  • Fixed timing of VInt.
  • Changed colors for the filebrowser.

V0.4 - 2009-11-01

  • Added R as FastForward.
  • Fixed Bios handling on MD (Frogger proto GG2SMS works).
  • Fixed "Border Off" for GG.
  • Sprite collision is now "On" by default.
  • Changed R as GG start to X as GG Start.

V0.3 - 2009-10-20

  • Fixed Bios handling a bit (GG games works again).

V0.2 - 2009-10-19

  • After loading game GUI is automatically closed.
  • Added internal Bios (for Ace of Aces & Shadow Dancer).

V0.1 - 2009-10-13

  • Initial release, allmost everything from SMSAdvance seems to work.

V0.0 - 2009-07-25

  • Started Coding.


Reesy for help with the Z80 emu core.

Some MAME people + Maxim for the SN76496 info.

Charles MacDonald (http://cgfm2.emuviews.com/) for VDP info.

Omar Cornut (http://www.smspower.org/) for help with various SMS stuff.

The crew at PocketHeaven for their support.