Radio Shack Trs-80 Expansion Interface: Operator's Manualcatalog Numbers: 26-1140, 26-1141, 26-1142

The 'Radio Shack TRS-80 Expansion Interface: Operator's Manual' is a technical guide written in the late 20th century for users of the TRS-80 microcomputer. It provides detailed instructions on setting up and utilizing the TRS-80 Expansion Interface, including information on hardware components, connection ports, and compatible expansion modules like printers and cassette recorders. The manual also addresses compatibility issues with different levels of BASIC, making it an essential resource for enhancing the functionality of TRS-80 systems.