[A83] Re: Stacking

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: Stacking
From: Peter-Martijn Kuipers <hyper@hysoft-automation.com>
Date: Sat, 14 Jul 2001 16:48:03 +0200 (CEST)
In-Reply-To: <95.d5361cd.2881b3bc@aol.com> from "ComAsYuAre@aol.com" at Jul 14, 2001 10:39:56 AM
Reply-To: assembly-83@lists.ticalc.org


Good point, I had written the message before I thought well.
Point of concern is that you must remember to put the stack pointer at the 
END of the memory block, in the example case:
ld sp,plotsscreen+300h

If you don't, then PUSHES :-) will corrupt other data.

Thanks for the correction.
--(Peter-Martijn)

> 
> Popping doesn't corrupt data anyway, only pushing does.  And if your code 
> doesn't manage it's pushes and pops properly, it's likely to crash no matter 
> where the stack pointer is.
> 
> 
> In a message dated 7/14/2001 10:38:20 AM Eastern Daylight Time, 
> hyper@hysoft-automation.com writes:
> 
> 
> > Well, I meant that if you need to be careful, since if you pop a little too 
> > often, you end up corrupting data.
> > Also, I might have misinterpreted some previous posts about using the stack
> > pointer, and I actually added the statement to point out that I do know 
> > about 
> > the dangers.
> > 
> > 
> 
> 
> 
> 
> ----
> Jonah Cohen
> <ComAsYuAre@aol.com>
> http://jonah.ticalc.org
> 
> 
>

References:

[A83] Re: Stacking

From: ComAsYuAre@aol.com