Codimex CD-6809 explained

Codimex CD-6809
Manufacturer:	Codimex
Unitssold:	380
Os:	Microsoft Extended Color BASIC, Tandy RSDOS, Microware OS-9, TSC Flex9
Cpu:	6809E @ 0.895 / 1.79 MHz
Memory:	32 kB
Display:	RF out, PAL-M
Graphics:	MC6847 video display generator
Sound:	6-bit DAC
Compatibility:	TRS-80 Color Computer

The Codimex CD-6809 was an 8-bit home computer produced in Brazil by the company Codimex Imp.Exp. de Computadores Ltda from Porto Alegre.^{[1] [2] [3]} It was introduced in early 1983, during the Brazilian "Market Reserve" period, and based on the TRS-80 Color Computer.^{[4] [5] [6] [7]}

The CD-6809 was the first Brazilian home computer compatible with the TRS-80 Color line.^[8] It was marketed as a computer for small business, entertainment and self employed professionals, and was sold with a 149-page user manual.^{[9] [10]}

Around 380 units were produced at the Porto Alegre plant.^[11] The machine can be emulated under MAME.^[12]

Technical features

The basic features of the Codimex CD-6809 are similar to the TRS-80 Color Computer:

• CPU: Motorola 6809E, 895 kHz to 1.79 MHz
• Memory:
  • ROM: 16 KB (containing "Color BASIC 1.1" and "Extended Color BASIC 1.0")
  • RAM: 32 KB
• Keyboard:
  • Built-in, 53-keys
• Display: Motorola 6847, 9 colors
  • Text mode (with 32 x 16 characters)
  • Low resolution graphics (with 64 x 32 pixels)
  • Medium and high resolution graphics (up to 256 x 192 pixels, 2 colors per pixel)
• Expansion port (cartridges, 40 pin)
• Other ports:
  • PAL-M RF out
  • RS-232C serial port (5 pin DIN)
  • Joysticks (5 pin DIN)
  • Cassette recorder (1500 baud, with remote engine control, 5 pin DIN)

The machine had a unique "Reverse Video" switch on the back, that displayed a black background with green characters.

See also

• Motorola 6809
• CP 400 COLOR
• LZ Color 64
• TRS-80 Color Computer

Notes and References

1. Web site: Campos . Daniel . Codimex CD-6809: A tríade agora está completa! AMX PROJECT . 2023-03-20 . pt-PT.
2. Web site: 2020-08-03 . Codimex CD6809 . 2023-03-20 . Família TRS Color . pt-BR.
3. Web site: Codimex CD-6809 . 2023-03-20 . MV - Marcos Velasco Software.
4. News: August 1983 . Equipamentos: CD-6809 . 42 . Micro Sistemas . 23 .
5. Web site: Codimex 6809 . 2023-03-20 . www.old-computers.com.
6. Web site: 2015-08-13 . Como lançar um computador na reserva de mercado . 2023-03-20 . Datassette . pt-br.
7. Web site: 2015-04-26 . Codimex CD-6809 - Material de Lançamento . 2023-03-20 . Datassette . pt-br.
8. Web site: Daniel . Campos . 2016 . The dawn of the CoCo clones in Brazil . 2023-03-20 . Vintage is The New Old . en-US.
9. Web site: 2015-05-05 . Codimex CD-6809 - Apresentação do Projeto para a Secretaria Especial de Informática . 2023-03-20 . Datassette . pt-br.
10. Book: Codimex CD-6809 - Manual Do Usuário . Codimex . 1983.
11. News: Campos . Daniel . July 2013 . Entrevista: Davi Menda - Sócio-fundador da Codimex . 17 . Jogos 80 . 11 . https://web.archive.org/web/20161027035836/http://garrettimus.org/Jogos80/jogos80-11.pdf . 2016-10-27 .
12. Web site: CD-6809 . 2023-03-20 . mame.spludlow.co.uk.