LAP6-DIAL

This document is the official programmer's reference manual for the LAP6-DIAL system used with the PDP-12 computer. It provides comprehensive instructions for using the DIAL keyboard operating system, which includes integrated text editing, program assembly, and file management capabilities. The manual covers both the DIAL-V2 (for 4K tape-based systems) and DIAL-MS (for 8K and larger disk-based systems) configurations. Key sections detail system operation, the text Editor, assembly language syntax, monitor commands for file and program manipulation, and the Peripheral Interchange Program (PIP) for managing data between various I/O devices. Additionally, the document contains detailed appendices regarding system initialization, startup procedures, error messages, character sets, and I/O routines for DIAL-MS.