website/content/museum/microdigital-tk-extended.md at 0663e96a461c61eb03008e0b13a047120e62c82a

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yann64andClaude Opus 5.5 b274874139 All machines linked to their forum thread (full comment import)

1,289 discussions, 9,527 archived comments; pages no longer carry the comments themselves.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

2026-10-13 17:26:43 +02:00

2.8 KiB

Raw Blame History

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

title

categories

types

origins

years

cpus

params

Microdigital TK EXTended

Computers

Professional Computer

Brazil

1988

Intel 8088-2

name

image

company

company_name

specs

tabs

forum_thread

photos

oc_id

source

TK EXTended

/media/museum/photos/microdigital_tkextended_system_2.jpg

/companies/microdigital

Microdigital

label	value
NAME	TK EXTended

label	value
MANUFACTURER	Microdigital

label	value
TYPE	Professional Computer

label	value
ORIGIN	Brazil

label	value
YEAR	1988

label	value
END OF PRODUCTION	Unknown

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BUILT IN LANGUAGE	None

label	value
KEYBOARD	Full stroke 86 key (84 key IBM PC-XT + 2 reset keys)

label	value
CPU	Intel 8088-2

label	value
SPEED	4.77 or 8 MHz

label	value
CO-PROCESSOR	8087-2 (optional)

label	value
RAM	768 KB

label	value
VRAM	16 KB

label	value
ROM	8 KB

label	value
TEXT MODES	80 chars. x 25 lines

label	value
GRAPHIC MODES	320x200 (4color) or 640x200 (monochrome)

label	value
COLORS	4

label	value
SOUND	PC Speaker

label	value
SIZE / WEIGHT	Unknown

label	value
I/O PORTS	1 x Parallel, 2 x Serial RS-232

label	value
BUILT IN MEDIA	2 x 5.25''. floppy drives or 1 x 5.25'' + 1 x 3.5'' low density

label	value
OS	MS DOS 3.2

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POWER SUPPLY	150w switching power supply unit

label	value
PERIPHERALS	8 PC compatible expansion slots

label	value
PRICE	Unknown

photos

922

title	subtitle	text	image
LARGER VIEW			/media/museum/photos/microdigital_tkextended_system_1.jpg

946

url	date
https://web.archive.org/web/20230328113304/http://www.old-computers.com/museum/computer.asp?c=946	2023-03-28

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.

2.8 KiB Raw Blame History

2.8 KiB

Raw Blame History