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From: kurash@carr.dartmouth.edu (Mark Valence)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Growing system heap, etc. (my previous post)
Summary: Don't use entries lower than 40...
Keywords: DRVR installation, unit table usage
Message-ID: <24043@dartvax.Dartmouth.EDU>
Date: 4 Sep 90 17:05:11 GMT
References: <mrr.3792@mrsoft.Newport.RI.US> <33417@cup.portal.com>
Sender: news@dartvax.Dartmouth.EDU
Reply-To: kurash@carr (Mark Valence)
Organization: Dartmouth College
Lines: 14

When you scan the unit table, you should start at entry #40, not #12.
These lower entries are reserved by Apple, I believe.  Also, you might
want to check the System file for DRVRs that might use each entry,
as previously suggested.

Also, you probably shouldn't use Unit Table entries greater than entry
#64 UNLESS you make sure that the table is that large.  Some earlier
Systems only allocate a table with 48 entries, and recent versions
allocate a 64 entry table.  Check low memory global UNtryCount (or some
such name, basically, 'UnitEntryCount'), which is an integer specifying
how large the unit table is.  See the proper tech note to find out how
to widen this table.

Mark.