A86: Re: Math Questions

To: <assembly-86@lists.ticalc.org>
Subject: A86: Re: Math Questions
From: "Dux Gregis" <assets@eden.rutgers.edu>
Date: Sun, 20 Sep 1998 13:50:19 -0400
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org





>
>I have several questions for the ASM gurus out there in cyberland:
>
>1.  How do I multiply numbers?  I assume that there are some ROM calls
>for this, and I'd love to know where they are,

hl = h*l  is at $4537
op1 = op1*op2 is at $548c

 but I also want to know
>HOW they multiply the numbers.

take a look at the russian peasants' algorithm in the ticalc.org routines.
I don't know how the ROM multiplies, though.

>
>2.  How do I divide numbers?  ""

hl = hl/a is at $4048
op1 = op1/op2 is at $54a8


>
>3.  How do I take a square root in ASM?

op1 = [sqrt]op1 is at $54ac (gives error if negative); $54b0 gives a complex
#

>
>4.  Is there an ASM equivilent of the BASIC 'Menu' command?

Read the what I worte about menus here from my web page:
http://www.eden.rutgers.edu/~assets/ti86.htm

take a look at ti86math.inc also

>
>Thanks,
>
>Cassady Roop
>Slightly Immoral Technologies
>

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