S8DS

S8DS
General
Author	FluBBa
Type	Console
Version	1.1.6
License	Mixed
Last Updated	2021/10/18
Links
Download
Website
Source

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

Features

• Support systems:
  • SEGA SG-1000/SG-1000 II.
  • SEGA SC-3000.
  • SEGA Mark III.
  • SEGA Master System J, 1 & 2.
  • SEGA Game Gear.
  • SEGA System-E.
  • Coleco.
  • MSX 1.
  • Sord M5.

Installation

Download and extract file, DIDL patch it (depend on flashcard).

Create a S8DS directory either in the root of your card or in the data directory (eg h:\data\S8DS).

Put games on flash card.

Regarding rom files:

• 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 characters.
• 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).
• You can check your roms here.

User guide

Menu

File:

• 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:

• 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.

Machine:

• 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.

Settings:

• 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 (Doesn't work).
• Autoload state - Toggle Savestate autoloading. Automatically 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.

Controls

L+R or Stylus - Access GUI

L/R - Change tabs

The leftmost tab - Exit GUI

Close your DS - Put the emulator in sleep mode

Know issues

Missing: correct sprite collision and overflow, speech samples, YM2413 emulation, EEPROM save for the few GG games that use it.

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.

Changelog

V1.1.6 2021/10/18

• Fixed load/save state for Coleco.

V1.1.5 2021/10/17

• Fixed load/save state.

V1.1.4 2021/10/16

• Reverted a GG_IO optimization.
• Fixed TV noise graphics after Power off.
• Fixed file extension checking.
• Fixed menu glitch if loading game directly.
• Fixed pause on older Sega machines.
• Better selection of machines.

V1.1.3 2021/10/12

• Fixed crash at startup.
• Added ui to enable/disable YM2413.

V1.1.2 2021/10/11

• Fixed TV noise.

V1.1.1 2021/09/05

• Code cleanup.

V1.1.0 2018/07/28

• Added Sord M5 support.

V1.0.0 2016/03/12

• Fixed Pause on SG-1000.

V0.9 2015/07/25

• Added SRAM support.
• Fixed folder browsing a bit.
• Fixed some nasty bugs which affected saving of settings and more.

V0.8 2015/07/08

• Added basic MSX 1 support.
• Added SG-1000 Arcade support.
• Added System-E support.
• Added MegaTech files support.
• Added support for 3 button MegaDrive pad.
• Added mini Bios from Power Base Converter for MegaDrive.
• Added background images for all Systems.
• Added support for arguments from flashcard menus.
• Support for longer filenames and more files per folder.
• Fixed sprite palette bug for TMS9918.
• Turned of sprites for Mode 1.

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.

Credits

Reesy for help with the Z80 emu core.

Some MAME people + Maxim for the SN76496 info.

Charles MacDonald for VDP info.

Omar Cornut for help with various SMS stuff.

The crew at PocketHeaven for their support.

External links

• Official website - http://www.ndsretro.com
• GitHub - https://github.com/FluBBaOfWard/S8DS
• GBAtemp - https://gbatemp.net/threads/s8ds.392855