TK 2000 explained

Type:	Personal computer
Processor:	MOS Technology 6502
Memory:	64KB (expandable to 128KB)
Os:	Applesoft BASIC compatible, TKDOS 3.3 (Apple DOS 3.3 compatible)
Manufacturer:	Microdigital Eletrônica
Display:	RF TV out or RGB; 40×24 text; 280×192 graphics; 8 colors
Memory Card:	Floppy Disks, Audio Cassette
Aka:	TK 2000 Color Computer, TK 2000 II Color Computer
Cpuspeed:	1,02 MHz
Sound:	Beeper

The TK 2000 microcomputer, produced by the Brazilian company Microdigital Eletrônica Ltda,^{[1] [2] [3]} was presented to the public during the 1983 Computer Fair and launched in 1984.^[4] It was a clone of the Microprofessor II manufactured by Multitech.^[5] Based on the 6502 CPU, the machine was partially compatible with Apple II Plus software and hardware.^[6] Some software was developed specifically for the machine, including productivity programs and games.^{[7] [8]}

In 1985 the TK2000/II was released and in 1987 the machine was discontinued.

Details

• CPU - MOS Technology 6502 at 1,02 MHz
• Memory - 16 KB ROM, 64 KB RAM (expandable to 128KB)
• Sound - one channel, up to 4 octaves with tones and semitones, 5 different tempos for each note, by software.
• Video - 280 x 192 with 8 colors, low-resolution mode emulates 16 colors through dithering.
• Keyboard - mechanical, 54 keys with QWERTY layout.
• Expansion - 1 slot
• Interfaces / Ports - TV output, RGB monitor, printer, joystick
• Storage - cassette recorder (1500 baud), external 5¼ floppy drive (140 Kb, double density)
• Operating system - BASIC, TKDOS 3.3 (Apple DOS 3.3 compatible)

Models

TK 2000 Color Computer

This is the initial 1984 model.

TK 2000/II Color Computer

A 1985 rebranding of the initial model.^{[9] [10]}

TK 2000/II Color Computer 128Kb

This versions adds a 64KB memory expansion, totaling 128KB, compatible with the Saturn memory expansion standard. Two hardware revisions of this model are known: TD112 with a satellite board, mounted next to the main board and connected to the main board via auxiliary wiring and TD122 with all components consolidated on a single board.

See also

• Microprofessor II

Notes and References

1. Web site: TK2000 . 2024-07-21 . Museu da Tecnologia . pt-BR.
2. Web site: 2015-12-18 . Microcomputador TK 2000 . 2024-07-21 . Museu de Tecnologia da Unoeste . pt-BR.
3. Web site: 2023-10-02 . MICRODIGITAL TK-2000 . 2024-07-21 . OLD-COMPUTERS.COM : The Museum. https://web.archive.org/web/20231002073615/https://www.old-computers.com/museum/computer.asp?st=1&c=1161 . 2023-10-02 .
4. May 1984 . TK 2000 no mercado . Micro Sistemas . 32 . 30.
5. Web site: 2024-03-15 . O microcomputador Microdigital TK-2000 de 1984 . 2024-07-21 . MCC - Museu Capixaba do Computador . pt-BR.
6. Web site: Binary Dinosaurs - Microdigital TK2000 . 2024-07-21 . www.binarydinosaurs.co.uk.
7. Web site: Microideia catalog .
8. Web site: Programas para TK-2000 .
9. Book: TK 2000/II Manual Técnico.
10. Web site: Ficha Técnica do TK-2000 Color Computer . 2024-07-21 . apple2pro.com.br.