PDP-11/04/34/34A Maintenance Card

This document, titled "PDP-11/04/34/34A Maintenance Card," is a comprehensive technical reference and troubleshooting guide for specific PDP-11 computer models. It provides detailed information essential for configuring, maintaining, and diagnosing hardware components.

Key areas covered include:

• Console Emulator & Operation: Instructions for using the console, including power-up sequences, console functions (load, examine, deposit, start, bootstrap), keyboard strokes, and interpreting diagnostic halts.

• Hardware Configuration: Extensive tables and diagrams detailing jumper and switch settings for various modules:

  • Processor Jumpers (KD11 series): Settings for parity detection.
  • Memory Modules (MM11-DP, MM11-YP Core, MS11-EP/FP/JP MOS, MS11-L): Address assignment, interleaved/non-interleaved memory operation, memory size, and backplane installation.
  • M7850 Parity Controller: Functionality, error detection, and CSR address selection.
  • Boot/Diagnostic ROMs (M9301-YA/YB/YF, M9312): Power-up functions, boot device selection (with/without diagnostics), ROM identification, and conversion procedures.
  • DL11-W Serial Line Unit: Address and vector selection, data format, parity, transmitter/receiver settings, baud rates, and line clock.
  • KK11-A Cache: Installation, cache hit/miss responses, and details of cache control and error registers.

• System Architecture & Power: Diagrams for various backplanes (DD11-CK/DK/PK), current distribution in different chassis types, modified Unibus pin assignments, and power requirements (+5 Vdc) for typical system components.

• Memory Management: Capabilities of the memory management unit, construction of physical addresses, and relocation constant calculations.
• Troubleshooting: Flowcharts guiding users through common symptoms (e.g., display blank, run light issues, printout problems, system halts) to identify possible causes and necessary further tests.

The document is designed for technical personnel, offering precise settings, addresses, and diagnostic information to ensure the correct functioning and repair of the PDP-11/04/34/34A systems.