M9312 Bootstrap/Terminator Module Technical Manual

This technical manual describes the M9312 Bootstrap/Terminator Module, a hardware component designed for Digital Equipment Corporation (DEC) PDP-11 computer systems.

Its core functions include:

• Providing Unibus termination resistors.
• Containing 512 words of Read-Only Memory (ROM), which stores:
  • Diagnostic routines (for CPU, memory, and cache).
  • A console emulator routine.
  • Various bootstrap programs for peripheral devices.

The module is highly configurable to adapt to different PDP-11 systems and specific booting requirements. This is achieved through:

• 12 jumpers for system compatibility.
• Five interchangeable ROM sockets to allow users to add or change ROMs for specific devices or functions.
• An Address Offset Switch Bank for selecting and initiating various diagnostic or boot routines.

Boot operations can be triggered by an external boot switch, during system power-up, or directly through programmer console load address and start sequences. The manual provides comprehensive details on the module's hardware, ROM format, power-up logic, console emulator usage, bootstrapping procedures, extended addressing, and a full description of the diagnostic tests. It serves as a guide for installation, operation, and maintenance.