Path: utzoo!attcan!utgpu!watmath!att!dptg!rutgers!njin!princeton!udel!udccvax1!friday
From: friday@vax1.acs.udel.EDU (Thomas A Mcdonald)
Newsgroups: comp.sys.apple
Subject: Interrupts
Message-ID: <4130@udccvax1.acs.udel.EDU>
Date: 9 Aug 89 03:49:21 GMT
Reply-To: friday@vax1.acs.udel.EDU (Thomas A Mcdonald)
Distribution: na
Organization: University of Delaware
Lines: 18



I am having trouble with handling serial port interrupts on my Apple IIgs.

Every time I enable the serial port interrupts, the system freezes when
the interrupt occurs.  I patched in to the IRQ.SERIAL vector (using the Misc.
tool set), but it seems as if the interrupt handler isn't passing control to
the serial port handling routine.  I even set up a dummy routine that would
write a value to specific memory location if a SCC interupt occured, but it
never reached my routine (I know the routine works because I set it up in 
IRQ.FLUSH vector and it worked fine).

Any ideas?

		Tom

(I even patched into IRQ.APTALK to make sure the Appletalk routine wasn't 
  trying to handle it).