RELIANCE 45C231 Voltage monitoring input card

The 172Bug package includes a set of hardware diagnostics for testing and troubleshooting the MVME172LX. To use the diagnostics, switch directories to the diagnostic directory. If you are in the debugger directory, you can switch to the diagnostic directory with the debugger command Switch Directories (SD). The diagnostic prompt 172-Diag> appears. Refer to the Debugging Package for Motorola 68K CISC CPUs User’s Manual for complete descriptions of the diagnostic routines available and instructions on how to invoke them. Note that some diagnostics depend on restart defaults that are set up only in a particular restart mode. The documentation for such diagnostics includes restart information.

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.

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