---
title: Leanord Silex
categories:
- Computers
types:
- Professional Computer
origins:
- France
years:
- '1979'
cpus:
- NMOS 6502
params:
  name: Silex
  image: /media/museum/photos/leanord_silex_1s.jpg
  company: /companies/leanord
  company_name: Leanord
  specs:
  - label: NAME
    value: Silex
  - label: MANUFACTURER
    value: Leanord
  - label: TYPE
    value: Professional Computer
  - label: ORIGIN
    value: France
  - label: YEAR
    value: September ? 1979
  - label: END OF PRODUCTION
    value: Unknown
  - label: BUILT IN LANGUAGE
    value: Monitor (2 KB) + Basic (6 KB). Extended Basic in option (10 KB)
  - label: KEYBOARD
    value: Full stroke QWERTY keyboard with numeric and function keypads. AZERTY available in option.
  - label: CPU
    value: NMOS 6502
  - label: SPEED
    value: 1 MHz
  - label: CO-PROCESSOR
    value: Unknown
  - label: RAM
    value: 32 KB, 48 KB or 64 KB depending on versions
  - label: ROM
    value: 8 KB (2 KB monitor + 6 KB Basic)
  - label: TEXT MODES
    value: 40 x 24, 80 x 24 in option
  - label: GRAPHIC MODES
    value: 280 x 192
  - label: COLORS
    value: 12'' monochrome built-in display
  - label: SOUND
    value: Unknown
  - label: SIZE / WEIGHT
    value: 35 (h) x 54 (l) x 59 (d) cm / 20 Kg
  - label: I/O PORTS
    value: Unknown
  - label: BUILT IN MEDIA
    value: |-
      built-in 5.25'' disk-drive (143 KB)\
      5.25'' 650KB high density and 8'' disk drives (1 MB and 2 MB)available in option as well as 10 MB hard disk
  - label: OS
    value: Unknown
  - label: POWER SUPPLY
    value: Built-in power supply
  - label: PERIPHERALS
    value: External disk drives (single & double), printers, A/D convertors, hard disk, 16 KB memory expansion, modem, real time clock, IEEE S 840 bus
  - label: PRICE
    value: 29 400 F (France, 1979)
  tabs:
  - photos
  - adverts
  - docs
  forum_thread: 1001
  photos:
  - title: SILEX
    subtitle: ''
    text: ''
    image: /media/museum/photos/leanord_silex_1.jpg
  adverts:
  - title: FRENCH ADVERT (NOV. 1979)
    subtitle: ''
    text: |-
      This is the only SILEX advert known so far...

      It says : "Silex, a stone in our competitors garden."

      Silex means flint in french, a stone mainly used in prehistoric times as tools and weapons.
    image: /media/museum/pubs/leanord_silex_pub_1.jpg
  - title: FRENCH ARTICLE
    subtitle: ''
    text: |-
      ...released in "l'Ordinateur Individuel" magazine n°12

      Thanks to Fabien Neck and its [website](http://www.system-cfg.com/) for this scan
    image: /media/museum/pubs/leanord_silex_oi12.jpg
  - title: SILEX DOCUMENTATION
    subtitle: ''
    text: ''
    image: /media/museum/pubs/leanord_silex_doc1.jpg
  docs:
  - title: LEANORD SILEX COMMERCIAL BROCHURE
    url: http://ksinfos.perso.sfr.fr/Articles/Leanord/silex.htm
    cover: /media/museum/docs/couvs/leanor_silex_doc_couv.jpg
    text: |-
      [**LEANORD SILEX COMMERCIAL BROCHURE**](http://ksinfos.perso.sfr.fr/Articles/Leanord/silex.htm)written by Leanord

       compiled/archived by Carl Hervier\
       type of document : Online reader\
       source : [Retro Computing](http://ksinfos.perso.sfr.fr/)

      **... READ THE ONLINE VERSION BY CLICKING BELOW :**
  oc_id: 1027
  source:
    url: https://web.archive.org/web/20230608074904/http://www.old-computers.com/museum/computer.asp?c=1027
    date: '2023-06-08'
---

Little is known about this computer. Help welcomed ! Silex means flint in french, a stone mainly used in prehistoric times as tools and weapons.

The SILEX is a professional computer released in 1979 by the french company Leanord. It was conceived from a modified Apple II board.

It has a professional keyboard with function keypad and numeric keypad. The display is built-in the system. It is monochrome but has graphic capabilities (280 x 192) and can display 40 x 24 characters (80 x 24 in option). To the right of the display is a 5.25'' disk-drive built-in the case (143 KB). Additional storage media will be available later (high density disk drives and hard disks).

Different languages were available : extended BASIC (in english and in french!), PASCAL, "evoluated disk operating system"...

The fact that there is so little information about the Silex, makes us believe that it had a very short life, at least under this name, since [SIL'Z systems](/museum/leanord-sil-z-model-5-6/) from the same company seem to be an evolution of the Silex. SIL'Z systems had some success, particularly in french administrations and schools.

<table> <tr> <td></td> <td>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.</td> <td></td> </tr> </table>