PAL12A Assembler

This document is a program library write-up for the PAL12A Assembler (DECUS No. 12-77), authored by Mark J. Hyde in 1972. It is based on MACRO-8 and designed for small 4K configurations of the PDP-12. Key features include support for literals, off-page links, and various pseudo-ops, though some rarely used functions of the standard DIAL assembler were removed to save space. The document provides detailed technical information on language compatibility with DIAL, operating procedures, keyboard input handling, error messages, and memory usage.