Microdigital TK83

Brand: Microdigital Eletrônica Ltda
Model: TK83
Made in: Brazil
First year of production: 1983
Price: Cr$ 139,850

Dimensions: 167 × 175 × 43 mm (feet adds 2 mm)
Weight: 429 g

This is a unlicensed ZX81 clone with 2K of memory. The 2 ROM chips stacked on top of each other are actually two 4K ROMs to make a total of 8K. It’s unknown if this was a factory modification or a user modification/repair.

The joystick port (6-pin DIN 45322) is cursor-key compatible (56780).