The TK80 was a home computer produced by ''Microdigital Eletrônica''. A clone of the

Sinclair ZX80 The Sinclair ZX80 is a home computer launched on 29 January 1980 by Science of Cambridge Ltd. (later to be better known as Sinclair Research). It is notable for being one of the first computers available in the United Kingdom for less than a hu ...

, it was introduced along with the

TK82 TK82 was a Sinclair ZX80 clone made by Microdigital Eletrônica Ltda., a computer company located in Brazil. It was introduced along with the TK80 in 1981, during the "''I Feira Internacional de Informática".'' In the January 1982 issue of ' ...

in 1981 during the "''I Feira Internacional de Informática".'' There were two versions, one with 1 KB

RAM Ram, ram, or RAM most commonly refers to: * A male sheep * Random-access memory, computer memory * Ram Trucks, US, since 2009 ** List of vehicles named Dodge Ram, trucks and vans ** Ram Pickup, produced by Ram Trucks Ram, ram, or RAM may also ref ...

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. Kovari estimated a potential market for 10000 machines in

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

, with expected buyers being novelty seekers, students and self employed professionals. According to some sources, the TK80 was never commercially produced, with only prototypes existing.

Specifications

Specifications were similar to the original machine: * CPU:

Z80A The Zilog Z80 is an 8-bit microprocessor designed by Zilog that played an important role in the evolution of early personal computing. Launched in 1976, it was designed to be software-compatible with the Intel 8080, offering a compelling altern ...

@ 3.25 MHz * Memory: ROM: 4 KiB; RAM: 1 or 2 KiB * Keyboard: 40 keys

membrane keyboard A membrane keyboard is a computer keyboard whose keys are not separate, moving parts, as with the majority of other keyboards, but rather are pressure pads that have only outlines and symbols printed on a flat, flexible surface. Very little tacti ...

* Display: 32 × 22 text; 64 × 44

semigraphics Text-based semigraphics, pseudographics, or character graphics is a primitive method used in early text mode video hardware to emulate raster graphics without having to implement the logic for such a display mode. There are two different ways ...

* Expansion: 1 slot * Outputs: 1 TV out (RF modulator, channel 3); cassette tape recorder audio in/out * Storage: Cassette tape (300 bauds)

References

{{Sinclair computers and clones Microdigital Eletrônica Z80 Goods manufactured in Brazil Sinclair ZX80 clones Computer-related introductions in 1981