CP 300 was a personal microcomputer produced by Prológica, a computer company located in Brazil, and introduced in 1983.
It was compatible in software and hardware with the American TRS-80 Model III, and could be considered a domestic and cheaper version of the CP 500, since it was supplied with only one cabinet containing the CPU and a chiclet keyboard. The power supply was external to the cabinet.
The CP 300 had 16 KB of ROM and 64 KB of RAM. Its keyboard had 54 keys with auto-repeat function, including two red keys that, when pressed together, forced a reset of the machine.
The display was limited to two text modes of 32x16 or 64x16 characters, and a semigraphic mode of 128x48 pixels.
Sound was generated by an internal cabinet speaker with a volume control at the back.
Expansion capability was limited to a connector located at the back of the machine. In terms of connectivity, it had a TV output (RF modulator, channel 3), a monitor output, and a cassette interface.
Audio cables were supplied with the computer for connection to a regular tape recorder, that could be operated at 500/1500 baud with remote relay activation.
Additionally, it was possible to connect up to four external 5.25" floppy drives, allowing the machine to run DOS-500 (TRS-DOS compatible).