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From: hellerst@husc4.HARVARD.EDU (Joe Hellerstein)
Newsgroups: comp.sys.mac
Subject: Interrupt switch doesn't work
Message-ID: <438@husc6.harvard.edu>
Date: 6 Oct 88 04:01:25 GMT
Sender: news@husc6.harvard.edu
Reply-To: hellerst@husc4.UUCP (Joe Hellerstein)
Organization: Harvard University Science Center, Cambridge MA
Lines: 11

I've noticed a bizarre problem with my Mac Plus recently.  When I hit the
interrupt on the programmer's switch, I don't get thrown into the
debugger box.  The mouse and keyboard seem to freeze up.  At first I thought
this might be due to some weird software in my System, but even when I 
shut off my hard disk and booted off of the original system diskette I 't
couldn't get the debugger box.
	Also, if I install MacsBug, things work fine with it.  

	Any guesses what's going on?

Joe Hellerstein