Codimex CD-6809

Codimex CD-6809
	Codimex CD-6809
Manufacturer	Codimex
Release date	1983; 42 years ago
Lifespan	1985; 40 years ago
Units sold	380
Operating system	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
Backward; 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.^[4]^[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:^[2]

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.^[2]

References

^ Campos, Daniel (2014-10-06). "Codimex CD-6809: A tríade agora está completa!". AMX PROJECT | Projetos para Amiga, Apple II e MSX (in Portuguese). Retrieved 2023-03-20.
^ ^a ^b ^c "Codimex CD6809". Família TRS Color (in Brazilian Portuguese). 2020-08-03. Retrieved 2023-03-20.
^ "Codimex CD-6809". MV - Marcos Velasco Software. Retrieved 2023-03-20.
^ ^a ^b "Equipamentos: CD-6809" (PDF). Micro Sistemas. No. 23. August 1983. p. 42.
^ "Codimex 6809". www.old-computers.com. Retrieved 2023-03-20.
^ leonardo (2015-08-13). "Como lançar um computador na reserva de mercado". Datassette (in Brazilian Portuguese). Retrieved 2023-03-20.
^ "Codimex CD-6809 - Material de Lançamento". Datassette (in Brazilian Portuguese). 1983. Retrieved 2023-03-20.
^ Daniel, Campos (2016). "The dawn of the CoCo clones in Brazil". Vintage is The New Old. Retrieved 2023-03-20.
^ Roteiro de Apresentação de Projeto de Fabricação à Secretaria Especial de Informática. Codimex. 1982.
^ Codimex CD-6809 - Manual Do Usuário (PDF). Codimex. 1983.
^ Campos, Daniel (July 2013). "Entrevista: Davi Menda - Sócio-fundador da Codimex" (PDF). Jogos 80. No. 11. p. 17. Archived from the original (PDF) on 2016-10-27.
^ "CD-6809". mame.spludlow.co.uk. Retrieved 2023-03-20.