---
title: AI Electronics ABC 20
categories:
- Computers
types:
- Professional Computer
origins:
- Japan
years:
- '1979'
cpus:
- Z80
params:
  name: ABC 20
  company: /companies/ai-electronics
  company_name: AI Electronics
  specs:
  - label: NAME
    value: ABC 20
  - label: MANUFACTURER
    value: AI Electronics
  - label: TYPE
    value: Professional Computer
  - label: ORIGIN
    value: Japan
  - label: YEAR
    value: '1979'
  - label: KEYBOARD
    value: |-
      QWERTY, mechanical keyboard\
      Function keys, arrow keys and numeric keypad
  - label: CPU
    value: Z80
  - label: SPEED
    value: Unknown
  - label: RAM
    value: 64 KB
  - label: VRAM
    value: Unknown
  - label: ROM
    value: 4 KB monitor loader
  - label: TEXT MODES
    value: 80 x 32
  - label: GRAPHIC MODES
    value: Unknown
  - label: COLORS
    value: Monochrome built-in display
  - label: SOUND
    value: Unknown
  - label: SIZE / WEIGHT
    value: Surely heavy !
  - label: I/O PORTS
    value: |-
      SIO : (RS232, current, TTL) : 2 chanels\
      PIO : (TTL) : 8bits x 2 ports\
      IEEE
  - label: BUILT IN MEDIA
    value: 2 floppy Disk units (322 KB)
  - label: OS
    value: Dosket & CP/M
  - label: POWER SUPPLY
    value: PSU built-in
  - label: PERIPHERALS
    value: |-
      Winchester type disk memory\
      Digital cassette tape (3 units)\
      Floppy disk (2 units)\
      Light Pen\
      Color Display\
      Printer\
      Graphic printer\
      XY Plotter
  - label: PRICE
    value: Unknown
  tabs:
  - adverts
  adverts:
  - title: FRENCH AD (JAN. 1980)
    subtitle: ''
    text: ''
    image: null
  oc_id: 451
  source:
    url: https://web.archive.org/web/20230210082456/http://www.old-computers.com/museum/computer.asp?c=451
    date: '2023-02-10'
---

There were several models : 20, 21, 22, 23, [24, 25 and 26](/museum/ai-electronics-abc-24/). The Model 2x was the successor of the ABC 10, which had a digital tape auxillary memory, supplied with DOSKET-T.

A lot of languages were developed for these computers:\
\- Dosket : Fortran IV, Basic, Cobol, Macro Assembler.\
\- CP/M : MBasic, CBasic, Pascal, Cobol 80, Fortran 80, PL/3, etc.

(AI DOSKET is the AI Electronics Operating System.)

<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>