PDP-12 Instruction List

This document, dated May 1969, is an instruction list for the Digital Equipment Corporation PDP-12. It contains two main sections: a character set format table mapping external ASCII characters to internal representations, and a technical reference table for PDP-12 instructions. The instruction table includes the mnemonic, numerical code, description of the function, and execution time in microseconds for various operations, including arithmetic (ADD), multiply, load (LDA), store (STC, STA, STH), and shift/rotate instructions.