Re: A86: Why?

To: <assembly-86@lists.ticalc.org>
Subject: Re: A86: Why?
From: Owen Cannon <owencannon@mac.com>
Date: Thu, 24 Feb 2000 07:12:24 -0800
In-Reply-To: <38B4C645.ECAEE44F@oregontrail.net>
Reply-To: assembly-86@lists.ticalc.org
User-Agent: Microsoft Outlook Express Macintosh Edition - 5.0 (1513)


I once pushed and popped until I could pop no more. Peter Piper Ret the POP
of Pushed Pickles; how many pushed piper pickle pops did he have left?


-- 
If olive oil comes from olives, where does baby oil come from?


> From: Cassady Roop <croop@oregontrail.net>
> Reply-To: assembly-86@lists.ticalc.org
> Date: Wed, 23 Feb 2000 21:48:53 -0800
> To: assembly-86@lists.ticalc.org
> Subject: Re: A86: Why?
> 
> 
> If it does this at the RET command, it's a pretty safe bet that you left
> trash on the stack, and it is attempting to return to the code that
> called it.  Only instead it goes to the address you left on the stack
> (perhaps you did a PUSH without a subsequent POP, or two POPs after one
> PUSH).  Be thankful this sends you to an error screen.  It almost always
> utterly crashes the calc.
> 
> The fact that it does not do it again when you run it the second time
> either means that
> 1) My answer is totally and utterly wrong, or
> 2) Your program is selectively trashing the stack: If there are two or
> more possible branches of program flow, maybe only one of them causes
> the problem, and the second time you run the program it follows a
> different branch.
> 
> Cassady Roop
> 
> 
> Sam Patterson wrote:
>> 
>> Ok, I call part of my program but at the ret command it gives me the
>> Undefined Error message. When I run the program again I don't get the error.
>> WHY is this happening?
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>

References:

Re: A86: Why?

From: Cassady Roop <croop@oregontrail.net>