Tandy · 1977 and 1980
TRS-80
Tandy’s influential Z80-based desktop computer family.
- Released
- Model I in 1977; Model III in 1980
- CPU
- Model I: Z80 at 1.77 MHz; Model III: Z80 at 2 MHz
- RAM
- 16K or 48K
- ROM
- 14K
- Text
- 64×16, black and white
- Graphics
- 128×48, black and white
- Sound
- One channel
- Storage
- Tape and 5.25-inch floppy disks
The TRS-80 range competed with the Commodore PET and the Apple II. The Model I came in two versions: Level I, with 4K RAM and a limited version of BASIC; and Level II, with 16K RAM and extended BASIC. Although mainly used for business, many machines were also used as home computers.