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Debugger General Information
Description of 187Bug
The 187Bug package is a powerful evaluation and debugging tool for systems built around the MVME187
187Bug consists of three parts:
❏The ÒdebuggerÓ or Ò187BugÒ; a
❏A
❏A user interface which accepts commands from the system console terminal
Command Facilities
Facilities are available for loading and executing user programs under complete operator control for system evaluation.
187Bug includes commands for these tasks:
❏Display and modification of memory
❏Breakpoint and tracing capabilities
❏A powerful assembler/disassembler useful for patching programs
❏A
Trap #496 Routines
Various 187Bug routines that handle I/O, data conversion, and string functions are available to user programs through the TRAP #496 handler. The TRAP #496 handler is accessible through any of the trap exception commands TB0, TB1, TBND, and TCND, with trap vector #496.