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ADD-X Système

This is a French professional computer conceived by ADD-X Systèmes based at Blagnac (Toulouse).

It was a CP/M, MP/M compatible system powered by a Z80, with 64k RAM. It had 2.4 MB on floppies but an optional 20 MB hard-disk could be added.

It was followed by the SMP-5 .

There were also two other models, the SM1 and SM2 which were quite similar technically (Z80, 64k RAM), but could be expanded to multipost configurations with up to 8 stations. The SM2 had a CII-HB D140 hard-disk (20 MB) built-in whereas the SM1 had only a 2 MB floppy-drive.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


Does the SM1 mentioned here have any relationship to the SM1 which was a precursor to Memotech computers, designed by Steve Marchant?

The SM1 I had was Z80 based, 64KB RAM, 2x 8" floppies (internal), connector allowing external hard drive, probably monochrome 80x24, blue metal case, looked very different to the picture (more like a 380Z), and had a very springy/noisy keyboard.

{{{ Andy

Friday 11th January 2013
Andy Key


TYPE  Professional Computer
ORIGIN  France
YEAR  1981
KEYBOARD  Full-stroke 97 key with editing and numeric keypads
CPU  Z80
SPEED  Unknown
RAM  64 kb + up to 256 KB dedicated to workstations
ROM  2 KB + 2 KB per workstation card
TEXT MODES  80 columns x 24 lines
COLORS  Monochrome
SOUND  No sound
SIZE / WEIGHT  46.5 (W) x 51 (D) x 17.5 (H) cm
I/O PORTS  2 x Parallel, 3 x Serial, up to 8 Serial worstation ports
BUILT IN MEDIA  2 x 1Mb floppies
PERIPHERALS  20 MB hard disk drive
PRICE  from 7600

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Battle Zone
Vectrex ship
C64 maze generator
Moon Lander
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Commodore 64 prompt
Pak Pak Monster
Pixel Deer
BASIC code
Shooting gallery
3D Cubes
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Vector ship

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