CP-300

CP 300

Manufacturer	Prológica
Type	Home computer
Release date	1983; 42 years ago (1983)
Operating system	BASIC Level II (TRS-80 compatible); DOS-500 (TRS-DOS compatible)
CPU	Zilog Z80A @ 2.0 MHz
Memory	64 KB RAM 16 KB ROM
Removable storage	Cassette tape, floppy disk (optional)
Display	PAL-M or monitor video out; 32x16, 64x16, 128x48
Sound	Beeper
Backward compatibility	TRS-80 Model III

CP 300 was a personal microcomputer produced by Prológica, a computer company located in Brazil, and introduced in 1983.[1][2][3]

General information

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.[4]

Technical details

The CP 300 had 16 KB of ROM and 64 KB of RAM.[2] 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.[2][4]

Sound was generated by an internal cabinet speaker with a volume control at the back.[4]

Expansion capability was limited to a connector located at the back of the machine.[4] In terms of connectivity, it had a TV output (RF modulator, channel 3), a monitor output, and a cassette interface.[2]

Audio cables were supplied with the computer for connection to a regular tape recorder,[4] 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).[2]

Accessories

• CP 300 Printer.[4]

Bibliography

• Micro Computador - Curso Básico. Rio de Janeiro: Rio Gráfica, 1984, v. 1, pp. 49–50.
• ABREU, Carlos Alberto C. 77 programas para linha TRS-80. Rio de Janeiro: Microkit, 1985.

References

1. CARDI, MARILZA CARDI (2002). EVOLUÇÃO DA COMPUTAÇÃO NO BRASIL E SUA RELAÇÃO COM FATOS INTERNACIONAIS (PDF) (in Brazilian Portuguese). FLORIANÓPOLIS, SC.
2. "CP 300". 1000 BiT. Retrieved 2022-12-19.
3. Velasco, Marcos. "Prológica CP-300". MV Museu de Tecnologia e Software. Retrieved 2023-01-06.
4. CP 300 Operação e Programação (in Brazilian Portuguese). Editele. 1983.