TK83

The TK83 was a home computer produced by the Brazilian company Microdigital Eletrônica Ltda. and introduced in August 1982. By December 1984, it was no longer being advertised by Microdigital, being discontinued in 1985.
The TK83 was a clone of the Sinclair ZX81, and can for all practical purposes, be considered a version of the TK82C with repagged memory and including the SLOW function which permitted the video be shown during processing.

General information

The TK83 had the Zilog Z80A processor running at 3.25 MHz, 2 KB RAM and 8 KB of ROM that included the BASIC interpreter.
The keyboard was made of layers of conductive material and followed the Sinclair layout with 40 keys.
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.
There was one expansion slot at the side of the machine, a cassette interface and a DIN joystick connector.