Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!apple!mattd
From: mattd@Apple.COM (Matt Deatherage)
Newsgroups: comp.sys.apple
Subject: Re: multitaskers/windows
Summary: Protecting against FREBUFR
Message-ID: <28629@apple.Apple.COM>
Date: 8 Apr 89 17:23:23 GMT
References: <8904070135.AA02226@wpi>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 27

In article <8904070135.AA02226@wpi> GREYELF@WPI.BITNET writes:
>
>The only problem I'm having is how to protect the memory against
>a freebufr call.
>
The technique for doing this is in ProDOS 8 TN #9.  In fact, everything else
that was in the old version of this note is now covered in some manual except
how to allocate space with GETBUFR that FREEBUFR will not reclaim.

The basic technique is to alter the value of RSHIMEM ($BEFB, on BASIC.SYSTEM's
global page) after calling GETBUFR and before calling FREEBUFR.  Full details
are in the note.

>--
>Michael J Pender Jr  Box 1942 c/o W.P.I.        I wrote SHELL and Daemon,
>greyelf@wpi.bitnet   100 Institute Rd.          send bug reports, suggestions,
>greyelf@wpi.wpi.com  Worcester, Ma 01609        checks to me.

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