Thomson TO7
The Thomson TO7, also called "Thomson 9000" is a home computer introduced by Thomson SA in November 1982, with an original retail price of 3750 Franc. By 1983 over 40000 units were produced. The TO7 is built around a 1 MHz Motorola 6809 processor. ROM cartridges, designed as MEMO7, can be introduced through a memory bay. The user interface uses Microsoft BASIC, included in the kit cartridge. The keyboard features a plastic membrane, and further user input is obtained through a lightpen. Cooling is provided by a rear radiator. Standard TV screens can be used as output through  a SCART (Peritel) connector, with a resolution of 320x200 (with 2 colors for each 8x1 pixels). The TO7 prototype, called Thomson T9000, was developed in 1980. The differences regarding the production model are a different startup menu and buggier BIOS. Thomson TO7/70. An upgraded version, the Thomson TO7/70, was released in 1984. Among improvements was an increased RAM of 48KB (64 KB including Video RAM) instead of 8KB (22 KB including video RAM). 70 stands for 64+6 (64KB RAM + 6KB ROM). The 6809 processor was replaced by a 6809E and the color palette  was extended from 8 to 16 colors. Graphics were provided by Motorola MCA1300 gate array. Software developed for the TO-7 can be run on the TO-7/70, but the reverse is not possible.