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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.


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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