Path: utzoo!attcan!uunet!ncrlnk!ncr-sd!hp-sdd!hplabs!ucbvax!pro-pac.cts.com!zach
From: zach@pro-pac.cts.com (Zach Taft)
Newsgroups: comp.sys.apple
Subject: Format of LongInt, etc...
Message-ID: <8811211337.AA04476@crash.cts.com>
Date: 20 Nov 88 10:09:00 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: pnet01!pro-simasd!pro-nsfmat!pro-pac!zach@nosc.mil
Organization: The Internet
Lines: 39

Hi,

        Well I certainly appreciated the last advice (from Kevin) on
some of the programming quirks of the 65816, but I've run into another
problem that I would like some help on.

        Can someone please describe the way that Integers and Long
Integers are stored in memory?  The reason I ask is that I want to
write some routines that will be able to convert 8-bit results into
16-bit Integers and Long Integers.  From what I've been able to read
I assume that they are stored in reverse order, just as pointers and
other addressing variables are.  That is:

        $E04F21 -- is stored as -- 21 4F E0 00

          $DEFB -- is stored as -- FB DE

        So one would assume that the 16-bit Integers and Long Integers
would be stored in the same way:

     #$13B4185E -- is stored as -- 5E 18 B4 13

         #$4152 -- is stored as -- 52 41

           #256 -- is stored as -- 00 01

         #65536 -- is stored as -- 00 00 01 00

         #65792 -- is stored as -- 00 01 01 00

        Well, that's it.  If you can shed some light on this, please do!

Zach Taft

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