Cannabaceae

TK80
ManufacturerMicrodigital Eletrônica
TypeHome computer
Release dateBrazil: 1981; 43 years ago (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
SuccessorTK82C

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 TK82C 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[edit]

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[edit]

  1. ^ "Clube do TK90X". www.tk90x.com.br (in Portuguese). Retrieved 2023-01-20.
  2. ^ a b "Directory: /Vintage/Sinclair/80/Clones/Microdigital, Brazil/TK80/". k1.spdns.de. Retrieved 2023-01-20.
  3. ^ "Historia". Z81 Never Die (in Portuguese). Retrieved 2023-01-20.
  4. ^ Veja (in Brazilian Portuguese). Editora Abril. 1989.
  5. ^ "Microdigital TK 80". www.museo8bits.com (in Spanish). Retrieved 2023-01-20.
  6. ^ "TK-80". 1000 BiT. Retrieved 2023-01-20.
  7. ^ "Análise: Reserva de mercado tornou indústria nacional de informática um nascedouro de clones" [Analysis: Market restrictions made the national computer industry a birthplace of clones]. Folha de S.Paulo (in Brazilian Portuguese). 2022-07-16. Retrieved 2023-01-20.
  8. ^ a b Noronha, Paulo (January 1982). "Simples e baratos, os novos micros pessoais estão chegando" [Simple and cheap, the new personal computers are coming]. Micro Sistemas (in Portuguese) (4): 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 Portuguese). Retrieved 2023-01-20.

One thought on “Cannabaceae

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

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