Radio Shack TRS-80 Micro Computer Technical Reference Handbook
The TRS-80 Micro Computer Technical Reference Handbook is Radio Shack's (a division of Tandy Corporation) service reference for the TRS-80 Model I logic board (PCB 1700069), second edition, second printing, 1982. It covers the Tandy TRS 80. The scan has 116 pages; its searchable text layer is archive.org OCR with recognition errors.
Contents
[edit | edit source]With printed page numbers:
- System block diagram and memory map (pp. 9 to 13)
- Theory of operation (pp. 14 to 56): CPU, system RAM, video, keyboard, cassette port, power supply (pp. 52 to 54) and the Level I and Level II ROMs
- Adjustments and troubleshooting, including the power supply checks (p. 60) and the regulator pin-voltage table, Figure 19 (p. 75)
- The expansion port (pp. 83 to 91)
- Parts lists for the Level I logic board, keyboard and RAM/ROM kit (pp. 93 to 97)
- Notes on the A, D and later board versions and their ROM types (pp. 99 to 110)
- The master schematic
What this document does not contain
[edit | edit source]It covers the Model I only. Component values appear only on the master schematic; the parts lists give Radio Shack part numbers.
Pages that cite this document
[edit | edit source]- Tandy TRS 80: cites p. 76
Download: Radio Shack TRS-80 Micro Computer Technical Reference Handbook (2nd edition, 1982).pdf