Backlinks  ·  Source Home * Hardware * TRS-80 TRS-80 was Tandy Corporation's first microcomputer model, with Zilog's Z80 8-bit CPU. TRS-80 was sold through Tandy's Radio Shack stores in the late 1970s and early 1980s. MicroChess , by Peter Jennings , was the first commercially-available microcomputer-based chess program running on a TRS-80,