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Thomson MO5

Last updated: February 4, 2026 at 7:17 PM
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The Thomson MO5 is a home computer introduced by Thomson SA in France in June 1984, designed to compete with systems like the ZX Spectrum and Commodore 64 [1]. It was also intended to support the French government's "Computing for All" plan to introduce computers into schools [1]. While not widely sold outside of France, the MO5 saw some success as an educational tool [1].

Overview#

The Thomson MO5 was released alongside the higher-end Thomson TO7/70 [1]. It retailed for 2390 FF at launch [1]. In 1986, it was largely discontinued in favor of the improved Thomson MO6 [1]. The computer boots directly into its built-in Microsoft BASIC interpreter, known as MO5 BASIC 1.0 [1]. The MO5 could also be used as a terminal for the "Nanoréseau" educational network [1].

Specifications#

The Thomson MO5 uses a Motorola 6809E processor, with a clock speed of 1 MHz [1]. It has 32 KB of RAM available to the user, with an additional 16 KB of RAM dedicated to video memory [1]. The system also contains 16 KB of ROM which holds the monitor and BASIC interpreter [1].
The MO5 features a display resolution of 320x200 pixels and is capable of displaying 16 colors; however, this capability is limited to two colors per 8x1 pixel area [1]. Graphics are generated using an EFGJ03L (or MA4Q-1200) gate array [1]. The computer is also capable of a 40 x 25 text display [1].
Sound is produced via a 1-bit square wave [1].
For input, there is a keyboard, with the option to connect a lightpen and joystick [1]. Cassette tapes and ROM cartridges can be used [2].

Variants#

Several variants of the Thomson MO5 were released [2]. These include:

MO5 Michel Platini#

This was a special edition named after the famous French footballer Michel Platini.

Thomson MO5E#

This version was released in 1985 [2].

Thomson MO5NR#

This version was released in 1986 [2].

Legacy#

Although not a huge commercial success outside France, the Thomson MO5 holds a place in the history of home computing, particularly in French education [1]. It represents an attempt to make computers accessible to a wider audience and introduce them into schools [1].

References

  1. [1]
    Thomson MO5 - Wikipedia
    en.wikipedia.orgretrieved February 4, 2026
  2. [2]
    Thomson MO5 - WE Computers Museum
    wecmuseum.orgretrieved February 4, 2026