Operating Instructions

3

Introduction

This chapter provides necessary information to use the MVME177 module in a system configuration. This includes:

Controls and indicators

Memory maps

Software initialization of the module

Controls and Indicators

On the front panel of the MVME177 module are the following:

ABORT and RESET switches

FAIL, STAT, RUN, SCON, LAN,+12V (LAN power), SCSI, and VME indicators

ABORT Switch S1

When enabled by software, the recessed front panel ABORT switch generates an interrupt at a user-programmable level. It is normally used to abort program execution and return to the 177Bug debugger firmware located in the MVME177 EPROMs.

The ABORT switch interrupter in the VMEchip2 is an edge-sensitive interrupter connected to the ABORT switch. This interrupter is filtered to remove switch bounce.

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Motorola MVME177 manual Controls and Indicators, Abort Switch S1