Technical data

3-1
3
3172Bug Firmware
Introduction
The 172Bug firmware is the layer of software just above the hardware. The
firmware supplies the appropriate initialization for devices on the
MVME172LX board upon power-up or reset.
This chapter describes the basics of 172Bug and its architecture, describes
the monitor (interactive command portion of the firmware) in detail, and
gives information on using the debugger and special commands. A list of
172Bug commands appears at the end of the chapter.
For complete user information about 172Bug, refer to the Debugging
Package for Motorola 68K CISC CPUs User’s Manual and to the
MVME172Bug Diagnostics User’s Manual, listed under Related
Documentation.
172Bug Overview
The firmware for the M68000-based (68K) series of board and system
level products has a common genealogy, deriving from the BUG firmware
currently used on all Motorola M68000-based CPUs. This member of the
M68000 Firmware family is implemented on the MVME172LX
MC68060- or MC68LC060-based Embedded Controller, and is known as
the MVME172BUG, or 172Bug. It includes diagnostics for testing and
configuring IndustryPack modules.
172Bug is a powerful evaluation and debugging tool for systems built
around MVME172LX CISC-based microcomputers. Facilities are
available for loading and executing user programs under complete
operator control for system evaluation. The 172Bug firmware provides a
high degree of functionality, user friendliness, portability, and ease of
maintenance.