TK82

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TK82
Developer Microdigital Eletrônica
Manufacturer Microdigital Eletrônica
Type Home computer
Release date1981;43 years ago (1981)
Operating system 4K Sinclair BASIC
CPU Z80A @ 3.25 MHz
Memory2  KB
Removable storage External Compact Cassette recorder at 300 bit/s
DisplayMonochrome display on television; 24 lines × 32 characters or 64 × 48 pixels graphics mode
GraphicsTTL integrated circuits
Power9V DC
Backward
compatibility 		ZX80
Predecessor TK80
Successor TK82C

TK82 was a Sinclair ZX80 clone made by Microdigital Eletrônica Ltda., a computer company located in Brazil. [1] [2] [3] It was introduced along with the TK80 in 1981, [2] [3] during the "I Feira Internacional de Informática".

Contents

In the January 1982 issue of Micro Sistemas magazine, Tomas Roberto Kovari, Microdigital's engineer, stated that the machines were being sold with a photocopied manual, while a printed version was being developed. [4] Kovari estimated a potential market for 10000 machines in Brazil, with expected buyers being novelty seekers, students and self employed professionals. [4]

The TK82 was replaced by the TK82C and TK83 Sinclair ZX81 clones. [3] Microdigital later produced the TK90X and TK95, which were clones of the ZX Spectrum.

General information

The TK82 was introduced in 1981, had the Zilog Z80A processor running at 3.25 MHz, 2  KB RAM and a 4 KB ROM with the BASIC interpreter. [1] [2] [3]

The keyboard was made of layers of conductive (membrane) material and followed the Sinclair layout. [2] The video output was sent via a RF modulator to a TV set tuned at VHF channel 3, and featured black characters on a white background. The maximum resolution was 64 x 44 pixels, based on semigraphic characters useful for games and basic images (see ZX80 character set). [1] [2]

Data Storage

Data storage was done in audio cassette tapes at 300 bits per second, [2] [3] and large programs could take up to 6 minutes to load. Audio cables were supplied with the computer for connection with a regular tape recorder.[ citation needed ]

As the data encoding was entirely done by software, some hacks were made available to allow faster transfers. Hi-fi recorders were required in order to use the greater speeds with a minimum of reliability.[ citation needed ]

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References

  1. 1 2 3 "MICRODIGITAL > TK-82". OLD-COMPUTERS.COM : The Museum. 2022-08-15. Archived from the original on 15 August 2022. Retrieved 2024-11-29.
  2. 1 2 3 4 5 6 "Microdigital TK 82,TK 82C". www.museo8bits.com. Retrieved 2024-11-29.
  3. 1 2 3 4 5 "Sinclair Nostalgia Products - Sinclair Clones - MicroDigital". www.interface1.net. Retrieved 2024-11-29.
  4. 1 2 Noronha, Paulo (January 1982). "Simples e baratos, os novos micros pessoais estão chegando". Micro Sistemas (in Portuguese). No. 4. p. 12.
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