yann64andClaude Opus 5.5
3eeabe9649
6,654 pages: 1,289 machines, 702 software, 460 companies, 64 history, 17 articles, 59 fun. 4,336 media files so far; references to files not downloaded yet are left out. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
94 lines
2.8 KiB
Markdown
94 lines
2.8 KiB
Markdown
---
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title: Microdigital TK EXTended
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categories:
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- Computers
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types:
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- Professional Computer
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origins:
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- Brazil
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years:
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- '1988'
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cpus:
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- Intel 8088-2
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params:
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name: TK EXTended
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company: /companies/microdigital
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company_name: Microdigital
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specs:
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- label: NAME
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value: TK EXTended
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- label: MANUFACTURER
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value: Microdigital
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- label: TYPE
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value: Professional Computer
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- label: ORIGIN
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value: Brazil
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- label: YEAR
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value: '1988'
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- label: END OF PRODUCTION
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value: Unknown
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- label: BUILT IN LANGUAGE
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value: None
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- label: KEYBOARD
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value: Full stroke 86 key (84 key IBM PC-XT + 2 reset keys)
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- label: CPU
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value: Intel 8088-2
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- label: SPEED
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value: 4.77 or 8 MHz
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- label: CO-PROCESSOR
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value: 8087-2 (optional)
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- label: RAM
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value: 768 KB
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- label: VRAM
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value: 16 KB
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- label: ROM
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value: 8 KB
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- label: TEXT MODES
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value: 80 chars. x 25 lines
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- label: GRAPHIC MODES
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value: 320x200 (4color) or 640x200 (monochrome)
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- label: COLORS
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value: '4'
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- label: SOUND
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value: PC Speaker
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- label: SIZE / WEIGHT
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value: Unknown
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- label: I/O PORTS
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value: 1 x Parallel, 2 x Serial RS-232
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- label: BUILT IN MEDIA
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value: 2 x 5.25''. floppy drives or 1 x 5.25'' + 1 x 3.5'' low density
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- label: OS
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value: MS DOS 3.2
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- label: POWER SUPPLY
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value: 150w switching power supply unit
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- label: PERIPHERALS
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value: 8 PC compatible expansion slots
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- label: PRICE
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value: Unknown
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tabs:
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- photos
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photos:
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- title: LARGER VIEW
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subtitle: ''
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text: ''
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image: null
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comments:
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- author: Steve Angel (USA)
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date: Thursday 31st May 2018
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text: Are you sure the upgrade isn''t an Intel 80286 processor and 80287 math coprocessor?
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oc_id: 946
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source:
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url: https://web.archive.org/web/20230328113304/http://www.old-computers.com/museum/computer.asp?c=946
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date: '2023-03-28'
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---
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TK Extended was a local version of [PC-XT](/museum/ibm-pc-xt-model-5160/), launched by Microdigital in 1988.
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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.
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This model marked the end of Microdigital, the same manufacuter of TK family, which included Sinclair ZX-81 (**TK-85**), Spectrum ([TK-90](/museum/microdigital-tk-90x/) and [95](/museum/microdigital-tk-95/)) and also Apple licensed products adapted to meet Brazilian laws regarding national content.
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Thanks to **Roberto Isiri** for information and picture.
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<table> <tr> <td></td> <td>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.</td> <td></td> </tr> </table>
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