Setname:  sg1000   
Year: 1983
Manufacturer: Sega
Status: good  works
Type: Game Console
Clones: Othello Multivision FG-1000,
Othello Multivision FG-2000,
SG-1000 II
Emulation info
Overall emulation:  good   
Color emulation:  good  
Sound emulation:  good  
Graphics emulation:  good  
Savestates:  supported   

Tech info
Z80 ("z80")cpu 3579545 Hz
Speaker ("mono")audio
SN76489A ("sn76489an")audio 3579545 Hz
Screen ("screen")raster horizontal 280 x 216 @ 59.922738
Media devices
cartridge ("slot") cartridge cart bin, sg
RAM options
1K 1024
Software lists

Romset info
This system uses no ROMs (data is contained in the optional media)

The first console manufactured by Sega. The Sega SG-1000 is the direct predecessor of the SG-1000 Mark II and, especially, of the SG-1000 Mark III, also known in Western countries as Sega Master System.


* CPU: NEC 780C (Zilog Z80 clone) 3.546893 MHz [PAL] or 3.579545 MHz [NTSC]
* Co-Processor: Texas Instruments TMS9918 VDP
* RAM: 2 KB
* VRAM: 16 KB
* ROM: None?
* Graphic Modes: 256x192
* Colors: 16 on screen
* Sound: Texas Instruments SN76489 DCSG, 4 channel mono (3 tone channels, 1 white noise channel)
* I/O Ports: Cartridge, Composite Video out, Parallel port, 2 Controller ports
* Controllers: 8-way joystick, 2 buttons
* Peripherals: Unknown
* Media: Cartridge


MESS requires a cart dump (in .sg or .bin format) in the ''cartridge'' (''cart'') device to run sg1000 emulation. You can launch emulation using, at command line

mess sg1000 -cart "C:\pathtogame\"


The console features a "Pause" button on the unit itself.

SG-1000 games are controlled through a 8-way joystick and two buttons. The game "TV Oekaki" allows to use a tablet to draw pictures which are displayed on the screen.

History and Trivia

The SG-1000, which stands for Sega Game 1000, is a cartridge-based video game console manufactured by Sega. This system marked Sega's entry into the home video game hardware business, which they would continue to be in until the end of the Dreamcast in 2001. While the system was not very popular, it was the basis for the more successful Sega Master System.

It was test marketed in Japan in 1981 and first released to the Japanese market in July 1983, in direct competition with Nintendo Famicom. Sega's arcade background meant that a number of arcade games were converted to the system, most of which were very well done. The graphics and sound may seem primitive today, but it was cutting edge technology back then and the games are still quite playable even now.

While Sega marketed the console in Asia, Grandstand Leisure took care of overseas sales. The console was available in a number of countries such as New Zealand and Taiwan, where it was quite popular, Italy, Spain, and South Africa, but for some reason it was never released in North America.

Some clones were also available: Tsukada Original manufactured Othello Multivision, and also produced a few original games for this system, while Bit Corp produced Dina 2-in-1, a clone brought to North America by a company called Telegames. Telegames called its clone the Telegames Personal Arcade and mainly advertised it as a ColecoVision clone, but it was able to play SG-1000 games as well.

It is remarkable SG-1000's wide availability on Taiwan's secondary market: this console is highly significant in Taiwan as one of its first and best-remembered consoles, where it was manufactured and sold (very briskly) under license. This was striking in that in the same time period from 1981 to 1986, Famicom games were widely pirated as standalone and multi-carts (replete with rudimentary switch banks to select the active ROM), as well as no less than three different pirated versions of the Atari 2600 with boastful monikers characteristic of the times ('Adventurer', 'Delight', 'Steadfast Creator').
Taiwan, among a few countries, also received a Mark IV version of the console - very likely a modified Sega Master System II - and the 'Mark' naming convention was further extended to the Mega Drive/Genesis (which became 'Mark V').

The SG-1000 was followed by the SG-1000 Mark II, which was released in 1984.

(info from & Wikipedia)


* Wikipedia page -- SG-1000
* SG-1000 at --

Other Emulators

* MEKA --

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