Multiply and Divide Test

Maindec 4 is a maintenance program designed to test the automatic multiply-divide hardware and the MUS and DIS instructions on the PDP-1 computer. The program functions by comparing hardware-calculated results against those from a software-simulated routine, with error information reported via the typewriter. The document provides detailed instructions for loading the program, configuring sense switches for specific testing behaviors, and troubleshooting procedures for identifying hardware malfunctions in the multiply and divide logic.