Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!apple!apple.com!chewy
From: chewy@apple.com (Paul Snively)
Newsgroups: comp.sys.mac.programmer
Subject: Re: jGNEfilter question
Message-ID: <4952@internal.Apple.COM>
Date: 30 Oct 89 17:08:26 GMT
References: <6901@hubcap.clemson.edu>
Sender: usenet@Apple.COM
Organization: Apple Computer, Inc.
Lines: 35

In article <6901@hubcap.clemson.edu> mikeoro@hubcap.clemson.edu (Michael K 
O'Rourke) writes:
> It mentions that a pointer to the event
> record is in register A1.  I tried some assembly in LSC to move the
> address to a local variable, but am having problems.
> 
> 
> The code i tried was :
> 
> Eventrecord *theEvent;
> 
>         asm {
>                 move.l theEvent,A1
>         }
> 
> When i check theEvent, there is NEVER a mouseDown or mouseUp.  (I had a 
sysbeep
> in).  I don't really know assembly, so could someone tell me what is 
wrong
> with what i am trying to do?  How can i properly get to the eventrecord
> so that i may change or modify its contents?

Oops.  Try "move.l A1,theEvent".  In other words, you got the parameters 
to the move instruction reversed.

Don't feel badly; this was a big stumbling block on the 680x0 to me for a 
long time, since I moved to this family from the Z-80!  (Anyone else here 
remember the mighty Z-80)?

__________________________________________________________________________
Just because I work for Apple Computer, Inc. doesn't mean that they 
believe what I believe or vice-versa.
__________________________________________________________________________
C++ -- The language in which only friends can access your private members.
__________________________________________________________________________