Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!sun-barr!oliveb!amiga!cbmvax!jesup
From: jesup@cbmvax.UUCP (Randell Jesup)
Newsgroups: comp.sys.amiga.tech
Subject: Re: software "exceptions"
Message-ID: <7526@cbmvax.UUCP>
Date: 3 Aug 89 03:56:38 GMT
References: <143@ckctpa.UUCP>
Reply-To: jesup@cbmvax.UUCP (Randell Jesup)
Organization: Commodore Technology, West Chester, PA
Lines: 25

In article <143@ckctpa.UUCP> crash@ckctpa.UUCP (Frank J. Edwards) writes:
>I've been trying to use the Amiga's signalling system to cause an
>"exception" (thats CBM's term, not Motorola's).  The idea is not
>to have to perform a Wait() for the CLOSEWINDOW gadget or to
>poll the tc_SigRecvd member of the Task Control Block...
...
>Compiled under Manx 3.6a with
>long flag;
>
>#asm
>_except:
>	moveq.l	#99,d1		; this is to let me know it worked!
>	move.l	d1,_flag
>	rts
>#endasm

	I suspect the Manx assembler is referencing flag off of A4, which of
course has a random value.  The Manx AS is rather nasty about changing your
code without asking you to what it "knows" is right.  Try large code/data 
or some such (I don't use manx).

-- 
Randell Jesup, Keeper of AmigaDos, Commodore Engineering.
{uunet|rutgers}!cbmvax!jesup, jesup@cbmvax.cbm.commodore.com  BIX: rjesup  
Common phrase heard at Amiga Devcon '89: "It's in there!"