Personal Computer User Manual

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PPCBug Firmware
3
❏ A self-test at powerup 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 User’s Manual, listed in
Appendix C, Related Documentation (hereafter referred to as
“debugger” or “PPCBug”).
❏ A command-driven diagnostics package for the MVME5100
hardware (hereafter referred to as “diagnostics”). The diagnostics
package is described in the PPCBug Diagnostics Manual, listed in
Appendix C, Related Documentation.
❏ 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
PPC6-Bug> is displayed and you have all of the debugger
commands at your disposal.
❏ If you are in the diagnostic directory, the diagnostic prompt
PPC6-Diag>
is displayed and you have all of the diagnostic
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
(for example, GO), then control may or may not return to PPCBug,
depending on the outcome of the user program.