Re: A86: Groupies

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Groupies
From: Grams Family <grams@netcarrier.com>
Date: Sat, 28 Mar 1998 09:23:50
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <351AB73F.2A04E291@eden.rutgers.edu>
References: <3.0.5.16.19980326094610.2be76aaa@mailserver.netcarrier.com>
Reply-To: assembly-86@lists.ticalc.org

At 03:14 PM 3/26/98 -0500, you wrote:
>
>> It subtracts 10 from the FPS. It moves the FPS the same as a pop would, but
>> doesn't do anything with the number that was on top of the stack.
>
>Thanks!  But why does the ROM push OP1 if it's only going to destroy the
>pushed value later?  Take a look at the routine at $598f.  I think that to
get a >working [sqrt]PARSE program you need to restore that value to OP1.
>

It looks like $598f just saves OP1 so that if it doesn't find a [sqrt]PARSE
variable, it can return without messing anything up. If it _does_ find the
var, it doesn't restore OP1, so I would guess that the [sqrt]PARSE program
is supposed to return something in OP1...haven't looked at any of the
related routines, but I can't think of any other reason why $598f would
just change FPS, rather than popping OP1.

--Joshua

References:

Re: A86: Groupies

From: Grams Family <grams@netcarrier.com>

Re: A86: Groupies

From: Dux Gregis <assets@eden.rutgers.edu>

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