Re: A86: Re: rom calls

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Re: rom calls
From: Dux Gregis <assets@eden.rutgers.edu>
Date: Mon, 11 May 1998 15:45:28 -0400
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
References: <006701bd7b24$d4563320$014103cf@joemama.minot> <3.0.5.16.19980511072658.2c177ada@mailserver.netcarrier.com>
Reply-To: assembly-86@lists.ticalc.org




Grams Family wrote:

> At 04:52 PM 5/9/98 -0400, you wrote:
> >
> Here's a revised description of how sqrtPARSE gets called:
>
> On page 3 at $5848, it checks if the flag for sqrtPARSE is set. If it
> isn't, then it jumps ahead to $5851 and continues as normal. Otherwise, it
> calls $3105, which is equivalent to call pg. D,$598F. $598F pushes OP1 and
> then checks if sqrtPARSE exists. If it doesn't, it pops OP1 and returns to
> 5851. If sqrtPARSE exists, it gets rid of the pushed OP1, pops hl 3 times,
> and calls _exec_asm to run sqrtPARSE. After _exec_asm returns, it does an
> alternate return, if one is installed - otherwise it jumps to pg. 3,$678e,
> which calls routines off the OP stack.

It jumps to the first routine popped off and takes the second one with it in
bc, but only if the routine is one of two addresses ... then it loops through
and keeps popping until it finds it.

Follow-Ups:

Re: A86: Re: rom calls

From: Stephen Hicks <shicks@mindspring.com>

References:

A86: Re: rom calls

From: "Trey Jazz" <joemama@minot.com>

Re: A86: Re: rom calls

From: Grams Family <grams@netcarrier.com>