Chapter 1 General Information; Introduction; General Description - Motorola M68CPU32BUG User Manual

Debug monitor

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This chapter provides a general description, installation instructions, start-up and system restart

instructions, memory requirements, and a terminal input/output (I/O) control description for the

M68CPU32BUG Debug Monitor (hereafter referred to as CPU32Bug). Information in this

manual covers the 1.00 version of the CPU32Bug.

The CPU32Bug package evaluates and debugs systems built around the M6833XBCC Business

Card Computer. System evaluation facilities are available for loading and executing user

programs. Various CPU32Bug routines that handle I/O, data conversion, and string functions are

available to user programs through the TRAP #15 handler.

CPU32Bug includes:

Commands for display and modification of memory,

Breakpoint capabilities,

An assembler/disassembler useful for patching programs,

A power-up self test feature which verifies system integrity,

A command-driven user-interactive software debugger (the debugger), and

A user interface which accepts commands from the system console terminal.

There are two modes of operation in the CPU32Bug monitor; the debugger mode and the

diagnostic mode. When the user is in the debugger directory the prompt CPU32Bug> is

displayed, and the user has access to the debugger commands (see Chapter 3). When the user is

in the diagnostic mode the prompt CPU32Diag> is displayed, and the user has access to the

diagnostic commands (see Chapter 6). These modes are also called directories.

CPU32Bug is command-driven. It performs various operations in response to user commands

entered at the keyboard. Figure 1-1 illustrates the flow of control in CPU32Bug. CPU32Bug

executes entered commands and the prompt reappears upon completion. However, if a command

is entered which causes execution of user target code (i.e., GO) then control may or may not

return to CPU32Bug. This depends upon the user program function.

CPU32Bug is similar to Motorola's other debugging packages, but there are two noticeable

differences. Many of the commands are more flexible with enhanced functionality. And the

debugger has more detailed error messages and an expanded on-line help facility.

M68CPU32BUG/D REV 1

CHAPTER 1

GENERAL INFORMATION

1-1

GENERAL INFORMATION

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