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M > MICRODIGITAL > TK-82   


Microdigital
TK-82

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.

 

I still have a TK 82C at home :-)
I will take some pictures and send them to you.

          
Wednesday 18th October 2006
Marcio Pinho (Brazil)

I like to see the TK95x in this site! Tanks

          
Wednesday 25th June 2003
wak (Brazil)

 

NAME  TK-82
MANUFACTURER  Microdigital
TYPE  Home Computer
ORIGIN  Brazil
YEAR  1981
BUILT IN LANGUAGE  Sinclair BASIC (extended in 82C & 83)
KEYBOARD  Membrane 40 keys
CPU  Z80A
SPEED  3.25 MHz
CO-PROCESSOR  ULA custom chip in TK-83
RAM  2 KB up to 16 KB (82 & 82C) or 64 KB (83)
ROM  4 KB (82), 8 KB (82C & 83)
TEXT MODES  32 chars. x 24 lines
GRAPHIC MODES  64 x 22 dots
COLORS  Monochrome
SOUND  Beeper
SIZE / WEIGHT  Approx. 17.5 (W) x 23 (D) x 3.8 (H) cm / 340 g
I/O PORTS  TV/RF, Bus expansion, tape recorder In/Out, Joystick, Power
POWER SUPPLY  External 10V power supply unit
PERIPHERALS  All of the Sinclair and third sources peripherals
PRICE  Unknown




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