VMS Notify SimH beeping

Peter Coghlan cctalk at beyondthepale.ie
Mon Mar 16 13:34:33 CDT 2015

Sander Reiche wrote:
> Probably stupid question, I'm sure, but I'd like to disable the beeping of
> SimH when VMS is notifying. I cannot seem to find anything of a
> configurable parameter in the documentation.

If you are getting opcom messages on the console, log on to the console and
do a REPLY /DISABLE to stop the messages until the next reboot.

Have a look at the comments in SYS$MANAGER:SYLOGICALS.TEMPLATE regarding
OPC$OPA0_ENABLE and OPC$OPA0_CLASSES for details on how to disable opcom
messages permanently.

For other ways of filtering the messages, check out the online help for

If you want the messages but not the beeps, it should be possible to write
a program that listens for messages and writes them out without beeping.

Peter Coghlan.

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