yann64andClaude Opus 5.5
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1,289 discussions, 9,527 archived comments; pages no longer carry the comments themselves. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
86 lines
3.3 KiB
Markdown
86 lines
3.3 KiB
Markdown
---
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title: Microdigital TK-82
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categories:
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- Computers
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types:
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- Home Computer
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origins:
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- Brazil
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years:
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- '1981'
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cpus:
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- Z80A
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params:
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name: TK-82
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image: /media/museum/photos/microdigital_tk82_system_1.jpg
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company: /companies/microdigital
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company_name: Microdigital
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specs:
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- label: NAME
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value: TK-82
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- label: MANUFACTURER
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value: Microdigital
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- label: TYPE
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value: Home Computer
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- label: ORIGIN
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value: Brazil
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- label: YEAR
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value: '1981'
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- label: BUILT IN LANGUAGE
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value: Sinclair BASIC (extended in 82C & 83)
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- label: KEYBOARD
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value: Membrane 40 keys
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- label: CPU
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value: Z80A
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- label: SPEED
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value: 3.25 MHz
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- label: CO-PROCESSOR
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value: ULA custom chip in TK-83
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- label: RAM
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value: 2 KB up to 16 KB (82 & 82C) or 64 KB (83)
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- label: ROM
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value: 4 KB (82), 8 KB (82C & 83)
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- label: TEXT MODES
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value: 32 chars. x 24 lines
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- label: GRAPHIC MODES
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value: 64 x 22 dots
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- label: COLORS
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value: Monochrome
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- label: SOUND
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value: Beeper
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- label: SIZE / WEIGHT
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value: Approx. 17.5 (W) x 23 (D) x 3.8 (H) cm / 340 g
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- label: I/O PORTS
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value: TV/RF, Bus expansion, tape recorder In/Out, Joystick, Power
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- label: POWER SUPPLY
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value: External 10V power supply unit
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- label: PERIPHERALS
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value: All of the Sinclair and third sources peripherals
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- label: PRICE
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value: Unknown
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tabs:
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- adverts
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forum_thread: 891
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adverts:
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- title: ARGENTINIAN ADVERT
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subtitle: ''
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text: Thanks to [CZARG](http://www.speccy.org/czarg/) for this picture.
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image: /media/museum/pubs/microdigital_tk82c_pub-arg_1.jpg
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oc_id: 912
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source:
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url: https://web.archive.org/web/20230328124651/http://www.old-computers.com/museum/computer.asp?c=912
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date: '2023-03-28'
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---
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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.
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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.
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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.
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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.
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Thanks to **Dimitri Kokken** for the picture.
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<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>
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