website/content/museum/microdigital-tk-82.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
Microdigital TK-82	Computers	Home Computer	Brazil	1981	Z80A	name image company company_name specs tabs forum_thread adverts oc_id source TK-82 /media/museum/photos/microdigital_tk82_system_1.jpg /companies/microdigital Microdigital label value NAME TK-82 label value MANUFACTURER Microdigital label value TYPE Home Computer label value ORIGIN Brazil label value YEAR 1981 label value BUILT IN LANGUAGE Sinclair BASIC (extended in 82C & 83) label value KEYBOARD Membrane 40 keys label value CPU Z80A label value SPEED 3.25 MHz label value CO-PROCESSOR ULA custom chip in TK-83 label value RAM 2 KB up to 16 KB (82 & 82C) or 64 KB (83) label value ROM 4 KB (82), 8 KB (82C & 83) label value TEXT MODES 32 chars. x 24 lines label value GRAPHIC MODES 64 x 22 dots label value COLORS Monochrome label value SOUND Beeper label value SIZE / WEIGHT Approx. 17.5 (W) x 23 (D) x 3.8 (H) cm / 340 g label value I/O PORTS TV/RF, Bus expansion, tape recorder In/Out, Joystick, Power label value POWER SUPPLY External 10V power supply unit label value PERIPHERALS All of the Sinclair and third sources peripherals label value PRICE Unknown adverts 891 title subtitle text image ARGENTINIAN ADVERT Thanks to [CZARG](http://www.speccy.org/czarg/) for this picture. /media/museum/pubs/microdigital_tk82c_pub-arg_1.jpg 912 url date https://web.archive.org/web/20230328124651/http://www.old-computers.com/museum/computer.asp?c=912 2023-03-28

The TK-82, of Microdigital Eletrônica Ltda, was one of the first Brazilian home computer anyone could afford. It was a fairly close copy of the Sinclair ZX-80 albeit looking very similar to a Timex TS-1000, the US version of the ZX-81 which was also sold in Brazil.

It was the second computer made by Microdigital, after the TK-80, first attempt to produce a ZX-80 copy. The company will later produce clones of a variety of other popular computers such as the Sinclair Spectrum, Apple II and even Tandy TRS-80 Model III. Actually, Microdigital never produced computers of its own design.

However, the TK-82 wasn't a mere copy of the ZX-80 but featured several enhancements: two KB of RAM instead of one, a joystick interface, a tone generator and a dual tape transfer speed which could be either 300 or 4800 baud.

Three models were successively launched. The TK-82 with 4 KB of BASIC ROM, then the TK-82S with 8 KB of ROM, then the TK-83 which RAM memory could be expanded up to 64 KB. First models used standard logic chips. They were later replaced by one custom chip, probably copied from the Sinclair ULA.

Thanks to Dimitri Kokken for the picture.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.