340 Display

This document is a programming manual for the Digital Equipment Corporation 340 Precision Incremental CRT Display, intended for users of the PDP-7 computer. It details the operational theory, display parameters (such as coordinate systems, scale, intensity, and light pen functionality), and data word formats (including parameter, point, slave, character, vector, vector continue, increment, and subroutine modes) necessary for programming the device. Additionally, it provides a summary of the PDP-7 computer instructions used to control the display and includes a comprehensive list of mnemonics and tables to assist programmers in developing display software.