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From: mrh@Shasta.STANFORD.EDU (Marc Hannah)
Newsgroups: comp.sys.mac
Subject: Re: Is there a recoverable RAM disk for the Mac?
Message-ID: <2175@Shasta.STANFORD.EDU>
Date: Thu, 29-Oct-87 16:31:41 EST
Article-I.D.: Shasta.2175
Posted: Thu Oct 29 16:31:41 1987
Date-Received: Wed, 4-Nov-87 01:48:58 EST
References: <691@rocky.STANFORD.EDU> <2487@cbdkc1.ATT.COM> <3320@uwmcsd1.UUCP>
Organization: Stanford University
Lines: 22
Keywords: RAM disk
Summary: ROM dependent suggestion

In article <3320@uwmcsd1.UUCP>, hammen@csd4.milw.wisc.edu (Robert Joseph Hammen) writes:
> In article <2487@cbdkc1.ATT.COM> joe@cbdkc1.UUCP (Joseph T. Judge) writes:
...
> >(i.e Dumb programmer mistake, hang, etc - yea, yea so I forgot to put 
> >an exit in the program).  Hit the Programmer's Switch (into that goofy 
> >Dialog Box or MacsBug) and type:    
> >	SM 0 A9F4     
> >	G 0
> 
> An alternative way is to type the following after hitting the interrupt switch:
> 	G 40F6D8

> Robert Hammen	Computer Applications, Inc.

    The first method of trapping to _ExitToShell is NOT ROM dependent
and should work on all Macintosh computers. The second method above is
not only ROM dependent, but should Apple patch the _ExitToShell trap
(say in MultiFinder or some future OS enhancement), it will not work
properly. I found this out the hard way on a Mac II. Use the first
incarnation!   

David Gelphman