---
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
  forum_thread: 993
  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
  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>