Magtape Focal

This document is a library write-up for the MAGTAPE FOCAL program, designed for use on PDP-8 computers equipped with an 8K core and a TC58 magnetic tape controller. The handler package allows users to perform tape operations—such as reading, writing, rewinding, and spacing—using FOCAL language commands, bypassing the complexities of assembly language programming. It supports features like I/O overlap, programmable tape density, and extensive error diagnostics. The document covers data storage mechanisms, usage instructions, function definitions, and provides tables for diagnostics and controller status codes.