ERRCON

This document describes the ERRCON monitor-detected error handling routines for version 474 of a Digital Equipment Corporation system, documented on June 4, 1969. It details various routines for handling system errors such as pushdown overflow, illegal memory references, non-existent memory, and input/output device errors. The document includes logic for printing relevant error messages to the console, halting jobs where necessary, and returning the console to monitor command mode. It also contains detailed macro-level instructions, a comprehensive symbol table, and cross-references for the routine locations.