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Firmware
33. Executes the configured boot routine, either ROMboot, Autoboot or Network Autoboot.
34. Executes the user interface (displays the PPC-Bug> or PPC-Diag> prompt).
5.6
Using PPCBug
PPCBug is command-driven. It performs its various operations in response to commands
entered at the keyboard. When the PPC-Bug prompt appears on the screen, the debugger is
ready to accept debugger commands. When the PPC-Diag prompt appears on the screen, the
debugger is ready to accept diagnostic commands. To change from one mode to the other,
enter SD.
Keyboard entries are stored in an internal buffer and only execute after the Return or Enter key
is pressed. This feature provides time to correct entry errors, if necessary, with the control
characters described in the PPCBug Firmware Package User's Manual.
After the debugger executes the command, the prompt reappears. However, if the command
causes execution of user target code (for example GO) then control may or may not return to
the debugger, depending on what the user program does. For example, if a breakpoint is
specified, control returns to the debugger when the breakpoint is encountered during execution
of the user program. However, the user program can return to the debugger by means of the
System Call Handler routine RETURN. For more about this, refer to the GD, GO and GT
command descriptions in the PPCBug Firmware Package User's Manual.
A debugger command is made up of the following parts:
The command name, either uppercase or lowercase (e.g., MD or md)
Any required arguments, as specified by command
At least one space before the first argument. Precede all other arguments with either a
space or comma
One or more options, precede an option or a string of options with a semicolon (;).
If no option is entered, the command's default option conditions are used
5.7
Debugger Commands
The individual debugger commands are listed in the following table. The commands are
described in detail in the PPCBug Firmware Package User's Manual.
You can list all the available debugger commands by entering the Help (HE) command alone.
You can view the syntax (description) for a particular command by entering HE followed by a
space, followed by the particular command mnemonic (as listed below), followed by a carriage
return. Remember that help is now available on both the BUG and DIAG side. In addition,
issuing help on a DIAG test category gives more information about the tests in that category.
110
CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)
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Using PPCBug
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