Motorola MVME147 Installation And Use Manual page 156

Debugger General Information
B
!
Caution
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Various 147Bug routines that handle I/O, data conversion,
and string functions available to user programs through the
TRAP #15 system calls
When using the 147Bug TRAP #15 functions, the
interrupt mask is raised to level 7 and the MMU is
disabled during the TRAP #15 function.
In addition, 147Bug provides as an option a ÒsystemÓ mode that
allows autoboot on power-up or reset, and a menu interface to
several system commands used in VME Delta Series systems.
147Bug consists of three parts:
A command-driven user-interactive software debugger,
described in this appendix, and hereafter referred to as Òthe
debuggerÓ or Ò147BugÓ
A command-driven diagnostic package for the MVME147
hardware, hereafter referred to as Òthe diagnosticsÓ
A user interface which accepts commands from the system
console terminal
When using 147Bug, you operate out of the debugger directory or
the diagnostic directory.
If you are in the debugger directory, the debugger prompt
Ò Ó displays and you have all of the debugger commands at
147-Bug>
your disposal.
If you are in the diagnostic directory, the diagnostic prompt
Ò Ó displays and you have all of the diagnostic commands
147-Diag>
at your disposal as well as all of the debugger commands.
You may switch between directories by using the Switch
Directories (SD) command. You may examine the commands in the
particular directory that you are currently in by using the Help
(HE) command.