Watchr III: A Program Analyzing and Debugging System for the CDC 6600; User's Manual (Classic Reprint)

This book introduces the WATCHR III system, a powerful tool for analyzing and debugging CDC 6600 programs. It provides tracing of selected instructions, changes to variables, the path taken by a program, changes to registers, loads, and subroutine calls. It can also trap on selected addresses, locations stored into, addresses loaded from, and opcodes. The system can dump part or all of memory and perform error checking for out of bounds jumps, memory and arithmetic errors, and incorrect values for variables. It can also be used to examine memory or registers during the run and recover from fatal errors. The book includes a discussion of the use and cost of WATCHR III and a number of examples. This book is an essential resource for anyone using the CDC 6600, and it is also a valuable reference for programmers using other computers.