Sega Master System/SG-1000 Mark III
Console Information

The Sega SG-1000 Mark III was the next game console in the SG-1000
series after SG-1000 Mark I
and SG-1000 Mark II (an updated Mark I). It was released in
Japan in 1984 to compete with the Nintendo
Famicom and designed similar to the Mark II. The parts inside
are similar to the MSX computer and SG-1000 but have been improved.
The system would take its own cartridges as well as Sega Cards and
SG-1000 carts. The Sega Cards are the same ones that are compatible
with the SG-1000 card catcher add-on, but the card catcher is now
built-in to the Mark III console.
The system was redesigned and renamed the Sega Master
System when released in the US in June 1986, a year after the Nintendo
Entertainment System, and sold for US$200. The Master System
was released in other places soon after including Japan again (in
November 1987), but in its new form. The system failed to make the
impact in America that Sega
had hoped for, mostly due to support for the dominant NES with its
exclusive third-party developers. The Sega Master System sold 125
000 units in its first four months, but in the same time, Nintendo
sold 2 million NES consoles.
Nintendo had 90% of the market in America, and it
would have taken a big effort to win over them, so Sega CEO Hayou
Nakayama decided he did not want to waste too much effort trying
to market a console in a market already largely dominated by a larger
company, so in 1988 Sega handed over the marketing of the console
to Tonka Toys. But this was not a good move and made matters worse.
Tonka had never marketed a console before and basically had no idea
what to do. The Sega Master System went nowhere during this period.
In 1990, after the Sega
Genesis had been established and was selling well, Sega got
the marketing rights to the Master System back from Tonka. They
released a new designed console with new packaging and called it
the Sega Master System II. This new version was made smaller and
to reduce costs it included no reset button, power light, card slot
or expansion port. Sega did everything that Tonka didn't to try
and market this version, but didn't get much from it. At least at
this time, the Genesis was doing well for them. The Master System
was supported for a few years more in the US.
In Europe, there is a different story about the Sega
Master System. It was marketed in many countries, including some
where Nintendo had not yet ventured to. There was lots of third
party support for the system in Europe and it outdid the NES. In
effect, Nintendo had to license some popular Master System titles
to the NES to try and make some sales. The console was supported
by Sega in Europe up until 1996 when it was discontinued so that
Sega could concentrate on the Saturn.
In Australia, the Master System did not do as well
as the NES but still did not suffer as much as it did in America.
Another success story for the Master System comes from Brazil, where
the console was marketed by Tec Toy. They released a Sega Master
System III and other variations. They also translated some games
and changed characters to be more appealing to Brazilian audiences.
They even ported some Game
Gear games to Master System cartridges and made some new Master
System games. It is perhaps because of the game and console production
that was more close to home for the Brazilians that the Master System
did so well. The console was supported until 1997.
The Master System had some success in the world, but
was a major failure in the US. Sega would have learnt more about
marketing a console and that's why their next console, the Genesis,
was their most successful console. But it is because of the Master
System that Sega was able to get into the worldwide market and make
the Genesis a success.
Sega Master System/SG-1000 Mark III Technical Specifications
- CPU: 8 Bit Zilog Z-80 Processor running at 3.58 MHz
- Graphics: Texas Instruments TMS9929A VDP
- VRAM: 64K
- RAM: 64-Kbits
- ROM: 1MB
- Colours Available: 256
- Max. Colours on screen: 52
- Pixel Resolution: 240 x 226, 32x28 character text display mode
- Max. Simultaneous Sprites: 16
- Sprite size: 8 x 8 pixels
- Sound: Texas Instruments SN-76596 PCM audio processor producing
6 channel mono sound
- 1 cartridge port
- 1 Game Card slot (Mark III and Master System 1 only)
- 2 controller ports
- AV port and internal RF adapter
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