[A89] Re: Forgot one question

To: assembly-89@lists.ticalc.org
Subject: [A89] Re: Forgot one question
From: sstear70@calvin.edu
Date: Tue, 24 Apr 2001 23:03:28 -0400 (EDT)
In-Reply-To: <003501c0cd33$44b654c0$bb902140@computer>
References: <003501c0cd33$44b654c0$bb902140@computer>
Reply-To: assembly-89@lists.ticalc.org
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You are free to destroy d0,d1,d2,a0,a1 as you like.  A2 will be saved and 
restored when the program or tsr in this case exits.  BUT i really doubt 
that a2 will be restored before your tsr call the next installed event 
hook.

My personal opinion is that it is silly to accomodate the teos kernel.



-Samuel Stearley



23 He (Elisha) went up from there to Bethel; and while he was going up on 
the way, some small boys came out of the city and jeered at him saying, 
"Go away, baldhead!  Go away, baldhead!  24 When he turned around and saw 
them, he cursed them in the name of the lord.  Then two she-bears came 
out 
of the woods and mauled forty-two of the boys.  25 From there he went on 
to Mount Carmel, and then returned to Samaria.

	- 2 Kings 2: 23-25



Quoting Greg <newstome2001@yahoo.com>:

> 
> Whoops, I forgot to ask one question! When I compile a program
> with TIGCC,
> and it uses the a2 register (yes I am obsessed with a2), does it
> save and
> restore it? I have observed that it appears to be the case. Which
> is what I
> would expect anyway, but It never hurts to ask the experts... This
> relates
> to the event hooks that i am making because it is my understanding
> that teos
> wants a2 to remain unchanged... If tigcc does it automatically,
> then I don't
> need to save and restore it.
> 
> Thanks again,
> Greg
> 
> 
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Follow-Ups:

[A89] Re: Forgot one question

From: "Greg" <newstome2001@yahoo.com>

References:

[A89] Forgot one question

From: "Greg" <newstome2001@yahoo.com>