Re: A82: fast multiply...

To: assembly-82@lists.ticalc.org
Subject: Re: A82: fast multiply...
From: ariwsi@juno.com
Date: Sun, 3 Aug 1997 09:54:40 -0500
References: <32031F35.82DF6AE5@swipnet.se>
Reply-To: assembly-82@lists.ticalc.org

On Sat, 03 Aug 1996  "Lars Ahlzén" <lars.ahlzen@swipnet.se> writes:
>Hello!
>
>[...]
>
>(by the way: is there a fast way for integer division, too?)

The fastest division I know of is in the calculator's ROM.  When
you call UNPACK_HL, it divides HL by 10 and puts the quotient in
HL and the remainder in A.  You can also divide by other values
by loading the divisor into A and then calling UNPACK_HL+2.  The
routine in ROM is very fast.  I'm not sure if it will work for
every value, but it could handle 5000/50, 2048/4, 1000/55....

--
Patrick Davidson (ariwsi@juno.com)
Visit my home page!  Stuff for Amiga, TI-85, TI-92, even DOS!
http://www.calweb.com/~kwdavids/patrick/
http://www.toptown.com/hp/ariwsi/

References:

A82: fast multiply...

From: "Lars Ahlzén" <lars.ahlzen@swipnet.se>