Motorola MVME2301 Installation And Use Manual page 82

PPCBug Basics
5
5-2
Display and modification of memory
Breakpoint and tracing capabilities
A powerful assembler and disassembler useful for patching
programs
A self-test at power-up feature which verifies the integrity of
the system
PPCBug consists of three parts:
A command-driven, user-interactive software debugger,
described in the PPCBug Firmware Package UserÕs Manual. It is
hereafter referred to as Òthe debuggerÓ or ÒPPCBugÓ.
A command-driven diagnostics package for the MVME230x
hardware, hereafter referred to as Òthe diagnostics.Ó The
diagnostics package is described in the PPCBug Diagnostics
Manual.
A user interface or debug/diagnostics monitor that accepts
commands from the system console terminal.
When using PPCBug, you operate out of either the debugger
directory or the diagnostic directory.
If you are in the debugger directory, the debugger prompt
is displayed and you have all of the debugger
PPC1-Bug>
commands at your disposal.
If you are in the diagnostic directory, the diagnostic prompt
is displayed and you have all of the diagnostic
PPC1-Diag>
commands at your disposal as well as all of the debugger
commands.
Because PPCBug is command-driven, it performs its various
operations in response to user commands entered at the keyboard.
When you enter a command, PPCBug executes the command and
the prompt reappears. However, if you enter a command that
causes execution of user target code (e.g., GO), then control may or
may not return to PPCBug, depending on the outcome of the user
program.