INDRAMAT DDS3.1-W050-D Pulse driver module

There are various ways to enter a user program into system memory for execution. One way is to create the program using the Memory Modify (MM) command with the assembler/disassembler option. You enter the program one source line at a time. After each source line is entered, it is assembled and the object code loads into memory. Refer to the Debugging Package for Motorola 68K CISC CPUs User's Manual for complete details of the 177Bug Assembler / Disassembler.

Another way to enter a program

 is to download an object file from a host system. The program must be in S-record format (described in the Debugging Package for Motorola 68K CISC CPUs User's Manual) and may have been assembled or compiled on the host system. Alternately, the program may have been previously created using the 177Bug MM command as outlined above and stored to the host using the Dump (DU) command. A communication link must exist between the host system and the MVME177 port 1. (Hardware configuration details are in the section on Installation and Start-Up in Chapter 3.) The file is downloaded from the host to MVME177 memory by the Load (LO) command.

Calling System Utilities from User Programs 

A convenient way of doing character input/output and many other useful operations has been provided so that you do not have to write these routines into the target code. You can access various 177Bug routines via one of the MC68060 TRAP instructions, using vector #15. Refer to the Debugging Package for Motorola 68K CISC CPUs User's Manual for details on the various TRAP #15 utilities available and how to invoke them from within a user program.

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