Codimex CD-6809

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]

Codimex CD-6809

Codimex CD-6809
Manufacturer	Codimex
Release date	1983; 42 years ago (1983)
Lifespan	1985; 40 years ago (1985)
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 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]

See also

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