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From: herzlich@NGP.UTEXAS.EDU (Larry Herzlich)
Newsgroups: comp.os.vms
Subject: Accessing the PFN database
Message-ID: <8709031347.AA09411@ngp.utexas.edu>
Date: Thu, 3-Sep-87 09:47:23 EDT
Article-I.D.: ngp.8709031347.AA09411
Posted: Thu Sep  3 09:47:23 1987
Date-Received: Sat, 5-Sep-87 11:05:36 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 29


I'm posting this for someone else so the wording may not be exactly
correct.
-----------------
Hopefully someone can provide some insight into a Real-time application
on a MicroVMS system.  I am trying to use mapped global sections for
sharing real-time data and was wondering...

   Has anyone ever used the $CRMPSC system service to associate a
section of process address space with page frame numbers (Map by PFN)
other than the I/O page?  I have not been able to determine which
page frame numbers are available for me to use.

   Basically, I'm trying to is create a permanent physical section of
450 pages to keep real-time data and then have another process be able
to read the mapped global section (but not modify it).

   Any insight into this application is greatly appreciated.
-----------------

   Mail responses to-
	Rebecca Farr
	Department of Astronomy, University of Texas at Austin
	rebecca@utastro.as.utexas.edu

   or directly to me - 
	Larry Herzlich
	herzlich@ngp.cc.utexas.edu
	CCCS001@UTADNX  -- BITnet