---
title: Microdigital TK-82
categories:
- Computers
types:
- Home Computer
origins:
- Brazil
years:
- '1981'
cpus:
- Z80A
params:
  name: TK-82
  image: /media/museum/photos/microdigital_tk82_system_1.jpg
  company: /companies/microdigital
  company_name: Microdigital
  specs:
  - label: NAME
    value: TK-82
  - label: MANUFACTURER
    value: Microdigital
  - label: TYPE
    value: Home Computer
  - label: ORIGIN
    value: Brazil
  - label: YEAR
    value: '1981'
  - label: BUILT IN LANGUAGE
    value: Sinclair BASIC (extended in 82C & 83)
  - label: KEYBOARD
    value: Membrane 40 keys
  - label: CPU
    value: Z80A
  - label: SPEED
    value: 3.25 MHz
  - label: CO-PROCESSOR
    value: ULA custom chip in TK-83
  - label: RAM
    value: 2 KB up to 16 KB (82 & 82C) or 64 KB (83)
  - label: ROM
    value: 4 KB (82), 8 KB (82C & 83)
  - label: TEXT MODES
    value: 32 chars. x 24 lines
  - label: GRAPHIC MODES
    value: 64 x 22 dots
  - label: COLORS
    value: Monochrome
  - label: SOUND
    value: Beeper
  - label: SIZE / WEIGHT
    value: Approx. 17.5 (W) x 23 (D) x 3.8 (H) cm / 340 g
  - label: I/O PORTS
    value: TV/RF, Bus expansion, tape recorder In/Out, Joystick, Power
  - label: POWER SUPPLY
    value: External 10V power supply unit
  - label: PERIPHERALS
    value: All of the Sinclair and third sources peripherals
  - label: PRICE
    value: Unknown
  tabs:
  - adverts
  forum_thread: 891
  adverts:
  - title: ARGENTINIAN ADVERT
    subtitle: ''
    text: Thanks to [CZARG](http://www.speccy.org/czarg/) for this picture.
    image: /media/museum/pubs/microdigital_tk82c_pub-arg_1.jpg
  oc_id: 912
  source:
    url: https://web.archive.org/web/20230328124651/http://www.old-computers.com/museum/computer.asp?c=912
    date: '2023-03-28'
---

The TK-82, of **Microdigital Eletrônica Ltda**, was one of the first Brazilian home computer anyone could afford. It was a fairly close copy of the Sinclair [ZX-80](/museum/sinclair-zx-80/) albeit looking very similar to a Timex [TS-1000](/museum/timex-sinclair-1000/), the US version of the [ZX-81](/museum/sinclair-zx-81/) which was also sold in Brazil.

It was the second computer made by Microdigital, after the **TK-80**, first attempt to produce a ZX-80 copy. The company will later produce clones of a variety of other popular computers such as the Sinclair [Spectrum](/museum/sinclair-zx-spectrum/), [Apple II](/museum/apple-ii/) and even Tandy TRS-80 [Model III](/museum/tandy-radio-shack-trs-80-model-iii/). Actually, Microdigital never produced computers of its own design.

However, the TK-82 wasn't a mere copy of the ZX-80 but featured several enhancements: two KB of RAM instead of one, a joystick interface, a tone generator and a dual tape transfer speed which could be either 300 or 4800 baud.

Three models were successively launched. The **TK-82** with 4 KB of BASIC ROM, then the **TK-82S** with 8 KB of ROM, then the **TK-83** which RAM memory could be expanded up to 64 KB. First models used standard logic chips. They were later replaced by one custom chip, probably copied from the Sinclair ULA.

Thanks to **Dimitri Kokken** 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>