---
title: Microdigital TK-83
categories:
- Computers
types:
- Home Computer
origins:
- Brazil
years:
- '1981'
cpus:
- Z80A
params:
  name: TK-83
  image: /media/museum/photos/microdigital_tk83_system_s1.jpg
  company: /companies/microdigital
  company_name: Microdigital
  specs:
  - label: NAME
    value: TK-83
  - label: MANUFACTURER
    value: Microdigital
  - label: TYPE
    value: Home Computer
  - label: ORIGIN
    value: Brazil
  - label: YEAR
    value: '1981'
  - label: END OF PRODUCTION
    value: Unknown
  - label: BUILT IN LANGUAGE
    value: Sinclair BASIC
  - label: KEYBOARD
    value: Membrane 40 keys
  - label: CPU
    value: Z80A
  - label: SPEED
    value: 3.25 MHz
  - label: RAM
    value: 2 KB up to 64 KB
  - label: ROM
    value: 8 KB
  - label: TEXT MODES
    value: 32 chars. x 22 lines
  - label: GRAPHIC MODES
    value: 64 x 44 dots
  - label: COLORS
    value: Monochrome
  - label: SOUND
    value: Unknown
  - label: SIZE / WEIGHT
    value: 167 (W) x 175 (D) x 40 (H) mm / 350g
  - label: I/O PORTS
    value: Tape recorder, joystick, TV-RF
  - label: POWER SUPPLY
    value: External AC adaptor
  - label: PERIPHERALS
    value: 16 and 48K RAM modules, all of the Sinclair peripherals
  - label: PRICE
    value: 85$ (USA, 1983)
  tabs:
  - photos
  photos:
  - title: LARGER VIEW
    subtitle: ''
    text: Thanks to **Franco Girardi**
    image: /media/museum/photos/microdigital_tk83_system_s3.jpg
  - title: TOP VIEW
    subtitle: ''
    text: Thanks to **Franco Girardi**
    image: /media/museum/photos/microdigital_tk83_topview_s1.jpg
  - title: BOTH SIDES
    subtitle: ''
    text: Thanks to **Franco Girardi**
    image: /media/museum/photos/microdigital_tk83_sides_s1.jpg
  - title: MICRODIGITAL LABEL
    subtitle: ''
    text: Thanks to **Franco Girardi**
    image: /media/museum/photos/microdigital_tk83_label_s1.jpg
  comments:
  - author: jaime (England, UK)
    date: Tuesday 15th April 2014
    text: Do you still have one the sell? I had one as a kid and would love to own one again :D
  - author: jaime (England, UK)
    date: Tuesday 15th April 2014
    text: Do you still have one the sell? I had one as a kid and would love to own one again :D
  - author: Rogerio de Avila (Brasilia/Brazil)
    date: Tuesday 13rd August 2013
    text: |-
      Jorge Nunez,\
      How do I contact you in private?\
      It''s about your TK83.\
      Thanks
  - author: Jorge Nunez (Brazil/Sao Paulo)
    date: Friday 14th June 2013
    text: I have one to sell..
  - author: Maldoror
    date: Monday 22nd April 2013
    text: 'As far as I know, Microdigital manufactured the TK line in Brazil. However, some electric goods manufacturer from Argentina got to sell some "2nd Generation" clones (clones of clones) under the Czerweny brand: CZ1000 standing for the TimexSinclair 1000, and so on. CZ2000 was a ZX Spectrum clone.'
  - author: Marthins (Lord Fenix) (brazil)
    date: Sunday 22nd April 2012
    text: |-
      TK83

      Width: 167 mm\
      Depth: 175 mm\
      Height: 40 mm\
      Weight: 350 g
  - author: Tigh (Brazil)
    date: Monday 16th January 2012
    text: |-
      Microdigital was a Brazillian manufacturer. Had a subsidiary in Argentina but all plants were located in Brazil (2 in São Paulo and 1 Manaus).\
      TK83 was manufactured on one of that plants and exported to Argentina just relabeled to be marketed as a national product.
  - author: Webmaster (France)
    date: Monday 5th September 2011
    text: Good question. That is weird because Microdigital is really from Brazil (http://en.wikipedia.org/wiki/Microdigital_Eletronica). Maybe the factory was in Argentina ?
  - author: Dragontamer (Spain)
    date: Monday 1st August 2011
    text: Sorry, but if the label on the computer says ''made in Argentina'', why is credited to Brazil?
  oc_id: 1019
  source:
    url: https://web.archive.org/web/20230328121623/http://www.old-computers.com/museum/computer.asp?c=1019
    date: '2023-03-28'
---

The TK83 followed the [TK82](/museum/microdigital-tk-82/). It was a close copy of the [ZX81](/museum/sinclair-zx-81/) but offered some enhanced features: 2 KB of RAM expandable up to 64 KB, and a joystick interface.

The tape speed could be either 300 or 4200 baud per second. The machine shipped with a beige or silver case, the same size as the ZX-81's.

Thanks to **Franco Girardi** for the picture.

<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>