Motorola IH5, MCPN750A manual PPCBug Overview, PPCBug Basics

PPCBug

3

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 MCPN750A motherboard upon power-up or reset.

This chapter describes the basics of PPCBug and its architecture. It also describes the monitor (interactive command portion of the firmware) in detail, and gives information on actually using the PPCBug debugger and the special commands. A complete list of PPCBug commands appears at the end of the chapter.

Chapter 6 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 the Related Documentation appendix.

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 is portable and easy to understand because it was written entirely in the C programming language, except where necessary to use assembler functions.

PPCBug includes commands for:

❏Display and modification of memory

3-1