Motorola MVME2600 Series User Manual download pdf (Page 53)

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101

2-1

2Using the Debugger

Entering Commands

The debugger is command-driven and performs its various

operations in response to commands that you enter at the

keyboard. When the PPC1-Bug> prompt appears on the screen, the

debugger is ready to accept commands.

What you enter is stored in an internal buffer. Execution begins

only after you press the Return key, allowing you to correct entry

errors, if necessary, using the control characters (refer to Control

Characters on page 2-7). After the debugger executes the command,

the prompt reappears.

However, if the command causes execution of target code (for

example GO) then control may or may not return to the debugger,

depending on what the 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.

For more about this, refer to the GD, GO, and GT command

descriptions in Chapter 3.

Alternately, the user program could return to the debugger by

means of the System Call Handler routine .RETURN (refer to

Chapter 5).

Command Syntax

A debugger command is made up of the following parts:

❏ The command name

❏ Any required arguments, delineated with either a space or

comma (precede the first argument with a space)

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Motorola MVME2600 Series User Manual Page 53

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