Laptop User Manual

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PPCBug
3
What you key in is stored in an internal buffer. Execution begins only after
you press the Return or Enter key. This allows you to correct entry errors,
if necessary, with the control characters described in the PPCBug
Firmware Package User’s Manual, Chapter 2.
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 has
been specified, then control returns to the debugger when the breakpoint is
encountered during execution of the user program. Alternately, the user
program could return to the debugger by means of the System Call Handler
routine RETURN (described in the PPCBug Firmware Package User’s
Manual, Chapter 5). For more about this, refer to the GD, GO, and GT
command descriptions in the PPCBug Firmware Package User’s Manual,
Chapter 3.
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.
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, Chapter 2
.
Note 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,