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5
5PPCBug
PPCBug Overview
The PPCBug firmware is the layer of software just above the hardware.
The firmware provides the proper initialization for the devices on the
MVME240x module upon power-up or reset.
This chapter describes the basics of the PPCBug and its architecture, along
with the monitor (interactive command portion of the firmware), and gives
information on using the PPCBug and the special commands. A complete
list of PPCBug commands appears at the end of the chapter.
Chapter 6, Environment Modification contains information about the
CNFG and ENV commands, system calls, and other advanced user topics.
For full user information about PPCbug, refer to the PPCBug Firmware
Package User’s Manual and the PPCBug Diagnostics Manual, listed in
Appendix D, Related Documentation.
PPCBug Basics
The PowerPC debug firmware, PPCBug, is a powerful evaluation and
debugging tool for systems built around the Motorola PowerPC
microcomputers. Facilities are available for loading and executing user
programs under complete operator control for system evaluation.
PPCBug provides a high degree of functionality, user friendliness,
portability, and ease of maintenance.
It achieves good portability and comprehensibility because it was written
entirely in the C programming language, except where necessary to use
assembler functions.
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