Xref: utzoo comp.sys.mac:46059 comp.sys.mac.hypercard:2970
Path: utzoo!attcan!uunet!snorkelwacker!ira.uka.de!smurf!urlichs
From: urlichs@smurf.ira.uka.de
Newsgroups: comp.sys.mac,comp.sys.mac.hypercard
Subject: Re: How to recover from a Mac crash (magic number)
Message-ID: <1374@smurf.ira.uka.de>
Date: 11 Jan 90 20:21:26 GMT
References: <1990Jan9.021328.18712@lsuc.on.ca> <50599@bbn.COM> <59@nrl-cmf.UUCP>
Reply-To: urlichs@smurf.ira.uka.de (Matthias Urlichs)
Followup-To: comp.sys.mac.programmer
Organization: University of Karlsruhe, FRG
Lines: 37

In comp.sys.mac.hypercard phillips@cmsun.UUCP (Lee Phillips) writes:
< [...]
< >models' ROMs is not the same.  (I KNOW it is different on the Plus.)
< >The results could be disastrous on other models.
< 
< On the Plus type G 4of6d8.

Please don't.
On _all_ Macs, type
SM 0 A9F0
G 0

(A9F0 is the ExitToShell trap.)

If that doesn't work, you can try
SM 0 FFFF
G 0

(Actually you should use the instruction number for the unimplemented
instruction instead of FFFF, but I can never remember that one. FFFF works on
all Macs, but that might possibly change)
which will put up a System Error box you can restart from. This has the
advantage that your hard disk is unmounted cleanly, which (if it works) saves
you from a session with Disk First Aid.

Hint: If you ever have to hit the Reset button, pop in you Locked Unmodified
System Disk(TM) (unmodified, that is, except that Set Startup is on
Finder-Only, with Disk First Aid as startup program, and something like
GateKeeper and/or GateKeeper Aid should be in its System Folder) and check
your hard disks. Most of the time it will be unnecessary, but you never know...

Further hint: If A9F0 does in fact work, do a _Save_As_ (not a Save!) on all
your work (if you're running MultiFinder) and then restart your Mac
immediately. Then check that those documents are still OK.
See last line of previous paragraph...
-- 
Matthias Urlichs