TK80

TK80
ManufacturerMicrodigital Eletrônica
TypeHome computer
Release dateBrazil: 1981 (1981)
Introductory priceCr$ 68,850 (1KB RAM), Cr$ 73,650 (2KB RAM)
MediaCassette tape
Operating system4K BASIC
CPUZ80A @ 3.25 MHz
Memory1 or 2 KB
DisplayMonochrome TV out; 24 lines × 32 characters or
64 × 48 block graphics mode
Backward
compatibility		ZX80
SuccessorTK82

The TK80 was a home computer produced by Microdigital Eletrônica.[1][2][3][4] A clone of the Sinclair ZX80,[5][6][7] it was introduced along with the TK82 in 1981 during the "I Feira Internacional de Informática". There were two versions, one with 1 KB RAM costing Cr$ 68,850 and another with 2 KB costing Cr$73,650.

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.[8] Kovari estimated a potential market for 10000 machines in Brazil, with expected buyers being novelty seekers, students and self employed professionals.[8]

According to some sources, the TK80 was never commercially produced, with only prototypes existing.[2][9][10]

Specifications

Specifications were similar to the original machine:

  • CPU: Z80A @ 3.25 MHz
  • Memory: ROM: 4 KiB; RAM: 1 or 2 KiB
  • Keyboard: 40 keys membrane keyboard
  • Display: 32 × 22 text; 64 × 44 semigraphics
  • Expansion: 1 slot
  • Outputs: 1 TV out (RF modulator, channel 3); cassette tape recorder audio in/out
  • Storage: Cassette tape (300 bauds)

References

  1. ^ Martins, Marcelo (2012). "Microdigital". Clube do TK90X (in Portuguese). Archived from the original on 2022-12-19. Retrieved 2023-01-20.
  2. ^ a b "Directory: /Vintage/Sinclair/80/Clones/Microdigital, Brazil/TK80/". kio's home. Retrieved 2023-01-20.
  3. ^ "Historia". Z81 Never Die (in Portuguese). Retrieved 2023-01-20.
  4. ^ Veja, Edições 1090-1094 (in Brazilian Portuguese). Editora Abril. 1989. p. 18.
  5. ^ Durán, Miguel. "Microdigital TK 80". El Museo de los 8 Bits (in Spanish). Retrieved 2023-01-20.
  6. ^ "TK-80". 1000 BiT. Retrieved 2023-01-20.
  7. ^ Fücher, Rodolfo (2022-07-16). "Análise: Reserva de mercado tornou indústria nacional de informática um nascedouro de clones". Folha de São Paulo (in Brazilian Portuguese). Retrieved 2023-01-20.
  8. ^ a b Noronha, Paulo (January 1982). "Simples e baratos, os novos micros pessoais estão chegando". Micro Sistemas (in Portuguese). No. 4. p. 12.
  9. ^ Silva, Daniel (2002). "Templo Digital - 8 BITS" (in Portuguese). Archived from the original on 2004-03-07. Retrieved 2023-01-20.
  10. ^ Cardoso, Carlos (2021-09-21). "Adeus Sir Clive Sinclair, obrigado por tudo" [Goodbye Sir Clive Sinclair, thanks for everything]. Meio Bit (in Brazilian Portuguese). Retrieved 2023-01-20.
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