A82: Re: Decimal numbers

To: assembly-82 <assembly-82@lists.ticalc.org>
Subject: A82: Re: Decimal numbers
From: Dines Christy Justesen <c958362@student.dtu.dk>
Date: Sat, 30 May 1998 11:29:03 +0200 (METDST)
Delivered-To: assembly-82-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-82@lists.ticalc.org


The easiest way to store non-integers is to use the OPs and TI's FP
format. As a part of Ash 3.1 I have written a .h file which allows you to
use all the math functions listed in 82-ROM.TXT and all the functions
which uses the OPs. For example to show 2*PI on the screen you would do
something like this.

LD A,4 ; Get constant number 4 (PI) listed in 82-ROM.TXT)
ROM_CALL(LD_OP1_CONSTA) 
ROM_CALL(LD_OP1_2OP1) ; Mul by 2
LD A,15 ; Number of digits used when dispaying it
CALL DISPOP1A ; Display it

Using FP numers is not very fast, but it is alot easier than using fix
point numbers.

Dines
-----Original Message-----
From: Kouri Rosenberg <kouri@juno.com>
To: assembly-82@lists.ticalc.org <assembly-82@lists.ticalc.org>
Date: 30. maj 1998 10:13
Subject: A82: Decimal numbers


>
>How would I go about displaying non-whole numbers, such as 3.14, 8.5,
>etc? And how should I store them? If I have to store 3.14 as 314 and then
>use UNPACK_HL twice, that means I have to use a word instead of a byte.
>And if I had a number like 3.1415927, how could I store that? Thanks in
>advance for any help I can get :)
>
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_______________________________________

Dines Justesen
Email: dines@post1.com or
       c958362@student.dtu.dk
WWW  : http://www.gbar.dtu.dk/~c958362/
_______________________________________

Follow-Ups:

A82: Re: Decimal numbers

From: kouri@juno.com (Kouri Rosenberg)