Re: A89: get a number

To: assembly-89@lists.ticalc.org
Subject: Re: A89: get a number
From: Olle Hedman <oh@hem.passagen.se>
Date: Tue, 13 Apr 1999 00:53:31 +0200
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-89@lists.ticalc.org
References: <19990412223505.3236.rocketmail@web222.mail.yahoo.com>
Reply-To: assembly-89@lists.ticalc.org


take the address of the first element, add with

y*elementsize*ywith+x*elementsize  

and you get the address of the element you want.

in your example elementsize is 2 (a word)  and ywith is 8
remember to count the first row as row 0

y*2*8+x*2

//Olle

Ben Rodgers wrote:
> 
> I have a quick question. How would I get a value from
> something like this
> 
> map:
> ;           |
> ;           V
>  dc.w 1,2,3,4,5,6,4,2
>  dc.w 3,2,4,2,4,1,2,3  <i want that number
>  dc.w 2,4,2,4,1,2,3,2
> 
> 
> where I want to get the fourth number in the second
> row.  Thanks.
> ===
> Visit my website, Some Assembly Required, at
> http://meltingpot.fortunecity.com/gilford/908
> 
> _________________________________________________________
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References:

A89: get a number

From: Ben Rodgers <bentensai@yahoo.com>