4 books
TRS80 Portable

Books on the TRS-80 Portable computers

Source: WikiPedia

intel :: 8085 :: 9800301C 8080 8085 Assembly Language Programming Manual Nov78

Published  in  1978

The TRS-80 model 100 portable computer : a complete step-by-step learner's manual

by  Lien, David A

Published  in  1983

ISBN:  0932760171

Tandy/Radio Shack Book: TRS-80 Portable Computer Subroutine Cookbook

Published  in  1984

Texas Instrument Book: creating-adventure-games-on-your-computer