Pdp-8 Instruction Test (Eae Type 182)—Part 3a

This document details the diagnostic program used to test the Extended Arithmetic Element (EAE) Type 182 for the PDP-8 computer.

Summary of Contents:

• Purpose: The program tests specific EAE instructions: MQL, MQA, SHL, LSR, ASR, NMI, and SCA. Its primary goal is to isolate errors to their root cause and the minimum number of logic cards.
• Requirements: Requires a PDP-8, an EAE Type 182, a keyboard reader, a teleprinter, and the High RIM or Binary Loaders. It utilizes memory locations $108$ through $54108$.
• Usage: Instructions are provided for loading the program into memory and starting it at address $0200_8$.
• Error Handling: The document describes how the program reports errors and provides control options via the SWITCH REGISTER (e.g., halting on errors, printing error information, or using "scope mode" to repeat tests).
• Diagnostics: Detailed lookup tables are included to help technicians map specific bit errors in the AC (Accumulator) or MQ (Multiplier Quotient) registers to specific processor logic boards and drawing locations.
• Note: This document only covers Part 3A; multiply and divide instructions are tested in a separate document (Maindec 801-3B).