KY11A ProgConsoleMan

This document is the KY11-A Programmer's Console Manual (DEC-11-HR7B-D) for the PDP-11/20 System, published by Digital Equipment Corporation.

The manual describes the KY11-A Programmer's Console, which serves as a crucial programmer interface for the PDP-11/20. It details:

1. Console Functions: Explanations of how an operator uses the console to perform various tasks:

   • LOAD ADDR: Manually insert addresses for programs or other operations.
   • EXAM: Examine the contents of specific memory locations.
   • DEP (Deposit): Deposit data into address locations.
   • CONT (Continue): Resume program execution from an interrupted state.
   • HALT: Manually stop processor operation.
   • START: Initialize the system and begin program execution from a specified address.
   • POWER FAIL: A comprehensive description of the system's response to AC power interruptions. This includes "power fail down" (trapping to address 000024 to save volatile information) and "power fail up" sequences (reloading stored information and restarting the program upon power restoration), along with associated waveforms and flow diagrams.

2. Module Description:

   • The KY11-A console itself is a circuit board containing switches, lamps, and logic. However, only the lamp-driver logic and switch filter logic reside on this board.
   • The primary control logic for the console functions is housed within the KA11 Processor (specifically, the M724 Bus and Console Control module).
   • Detailed descriptions of the internal lamp-driver logic (how indicator lamps are driven) and switch logic (how manual inputs are converted and filtered for processor control).

In essence, the manual provides a detailed technical reference for understanding the operation, internal logic, and system interactions of the KY11-A programmer's console, including its critical role in managing system startup, execution, and power failures.