TK Extended was a local version of PC-XT, launched by Microdigital in 1988.
To minimize the technological gap between American and Brazilian models, the manufacturer offerred an upgrade card, named Cometa 286 (Comet 286), which goal was to replace the processor with a 7.15 MHz 20286 Intel processor, and also a 20287 math co-processor.
This model marked the end of Microdigital, the same manufacuter of TK family, which included Sinclair ZX-81 (TK-85), Spectrum (TK-90 and 95) and also Apple licensed products adapted to meet Brazilian laws regarding national content.
Thanks to Roberto Isiri for information and 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.
Please consider donating your old computer / videogame system to Old-Computers.com or one of our partners from anywhere in the world (Europe, America, Asia, etc.).
Are you sure the upgrade isn''t an Intel 80286 processor and 80287 math coprocessor?
Thursday 31st May 2018
Steve Angel (USA)
NAME
TK EXTended
MANUFACTURER
Microdigital
TYPE
Professional Computer
ORIGIN
Brazil
YEAR
1988
END OF PRODUCTION
Unknown
BUILT IN LANGUAGE
None
KEYBOARD
Full stroke 86 key (84 key IBM PC-XT + 2 reset keys)
CPU
Intel 8088-2
SPEED
4.77 or 8 MHz
CO-PROCESSOR
8087-2 (optional)
RAM
768 KB
VRAM
16 KB
ROM
8 KB
TEXT MODES
80 chars. x 25 lines
GRAPHIC MODES
320x200 (4color) or 640x200 (monochrome)
COLORS
4
SOUND
PC Speaker
SIZE / WEIGHT
Unknown
I/O PORTS
1 x Parallel, 2 x Serial RS-232
BUILT IN MEDIA
2 x 5.25''. floppy drives or 1 x 5.25'' + 1 x 3.5'' low density
