Tandy TRS‑80 Model III

The Model III is the successor of the 1977 TRS-80 which was renamed to the TRS-80 Model I.

The basic configuration has 4KB of memory and no disk drives. These could be easily built-in, and the memory could be expanded up to 48KB.

Other changes were an extended Basic, better keyboard, expanded character set and a real time clock. The biggest change was the number of cables. To connect a fully operational TRS-80 Model 1 with one disk drive, you'd need 5 power sockets. The Model III had the same, but only used one power socket.

Soon after the Model III's release, the Model I was taken off the market. The Model 1 couldn't comply to the new rules of the FCC due to the electronic radiation.

The successor of the Model III followed in April 1983 and was called the Model 4.

Catalog type
Desktop computer
Release Date
July 1980
Zilog Z80 @ 2.03 Mhz
Operation System
Microsoft Basic

Museum Collection

Set up interactively in the 80s area.