Motorola MVME2700 Series Servisní příručka stáhnout pdf (Strana 155)

5-1

5PPCBug Firmware

Overview

The PowerPC debugger, PPCBug, is a versatile tool used to evaluate and

debug systems built around Motorola PowerPC microcomputers. Its

primary uses are to test and initialize the system hardware, determine the

hardware configuration, and boot the operating system. Facilities are also

available for loading and executing user programs under complete

operator control for system evaluation.

The PowerPC debugger provides a high degree of functionality and user

friendliness, and yet stresses portability and ease of maintenance. It

achieves these features 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,

breakpoint and tracing capabilities, a powerful assembler and disassembler

useful for patching programs, and a “self-test at power-up” feature which

verifies the integrity of the main CPU board. Various PPCBug routines

that handle I/O, data conversion, and string functions are available to user

programs through the System Call handler. PPCBug consists of three

parts:

❏ A command-driven user-interactive software debugger, also called

PPCBug.

❏ A set of command-driven diagnostics.”

❏ A user interface which accepts commands from the system console

terminal.

When using PPCBug, you operate from within either the debugger

directory (PPC1-Bug) or the diagnostic directory (PPC1-Diag) which

tells you the current directory.

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Motorola MVME2700 Series Servisní příručka Strana 155