A85: Re: Re: Assembly-85 Digest V1 #526
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A85: Re: Re: Assembly-85 Digest V1 #526
Try downloading formats.zip from ticalc and read about the n files, it
exaplins how reals are stored.
Dines
BTW Even if you don't need it anymore, it is still nice to know how it
works.
----- Original Message -----
From: Jimi Malcolm <MalcolmJ1@email.msn.com>
To: <assembly-85@towerguard.unix.edu.sollentuna.se>
Sent: Monday, March 22, 1999 6:13 PM
Subject: A85: Re: Assembly-85 Digest V1 #526
>
> dines, you're awesome, but i still don't get how to save the numbers. can
> you give me some more examples? like:
> 250.435
> 1.009
> 3.452
> 234.432
> 345.435
> ...
> ...
> ...
> 23.12
> i just need a bunch of examples so i know how to store the numbers. i'm
> going to be storing the molar masses of elements. can you use some of
those
> values and show me? thanks a ton. i'm kinda getting it. thanks.
>
> jimi
>
> <<<Date: Mon, 22 Mar 1999 02:06:41 -0500
> From: "Dines Justesen" <dines@resnet.gatech.edu>
> Subject: A85: FP Math (was: Re: Re: Assembly-85 Digest V1 #522)
>
> As far as I know the only working FP math program for the TI85 is a
program
> which converts the value in ans to a fraction using square roots. The
> program was written by a french guy (I do not remember his name and he is
as
> far as I know no longer an active ti85 programer), and it is based on a
> proram written in BASIC. The program is written for ZShell, but only runs
on
> ROM version 3.0A since no shell supports the FP math functions. The
program
> has one small error which causes it to hang, but other wise works fine.
> Since it only works for one ROM version, it was never released.
>
> I have myself written some programs on the TI82 which uses FP math and the
> error handler. They are fairly simple and are intended to show people how
to
> use FP math, and they work on all ROM versions. If anyone want to do FP
math
> on the TI85, I could probably send you a copy of the source code.
>
> Doing FP math is fairly simple if you under stand the format of the FP
> number used on the TI85. Let me give an example:
>
> LD A,4 ; OP2 = constant number 4 (PI)
> CALL 24D3
> CALL 21A3 ; OP1=2.0
> CALL E52 ; OP1=OP1*OP2
>
> The above program calculates 2*PI and stores the value in OP1, from where
it
> can then be displayed. Most of the ROM functions needed can be found in
> TI-ROM.TXT. The only thing which you need besides that it the ability to
> load your own number into the OPs. The easiest way of doing this is by
> defining them in you program, for example:
>
> My_num:
> .DB $00,$01,$FC,$10,$00,$00,$00,$00,$00,$00,$00 ; 10.00
>
> Then the following will load the number into OP1:
> LD HL,My_num ; point to number
> RST 20 ; load it
>
> Again the needed function are listed in TI-ROM.TX>>>
>
> DINes
>
>
>
>
>
References: