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167Bug Firmware
3
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. Alternatively, the user
program could return to the debugger by means of the System Call Handler
routine RETURN (described in Chapter 5 of the Debugging Package for
Motorola 68K CISC CPUs User’s Manual).
What you key in is stored in an internal buffer. Execution begins only after
you press the <Return> or <Enter> key.
A debugger command is made up of the following parts:
❏
The command name, either uppercase or lowercase (e.g., MD or
md).
❏
A port number (if the command is set up to work with more than
one port).
❏
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.
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