Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!mintaka!ai-lab!rice-chex!bson
From: bson@rice-chex.ai.mit.edu (Jan Brittenson)
Newsgroups: comp.sys.handhelds
Subject: Re: 32 Bt Mant is < I need!
Message-ID: <12330@life.ai.mit.edu>
Date: 10 Dec 90 16:20:00 GMT
References: <1990Dec10.034626.27415@cc.ic.ac.uk> <10060@jarthur.Claremont.EDU> <2667@charon.cwi.nl>
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In article <2667@charon.cwi.nl> jurjen@cwi.nl (Jurjen NE Bos) writes:

 > The 48SX already has arbitrary-large binaries--except that it cannot
 > do computations with them.  ... If only someone would write input and
 > calculation routines for those long binaries...

   The HP-48 performs logical operations on strings, and since binary
numbers essentially are strings with a different type prefix, all we
have to do for AND, OR, XOR, NOT, is to bypass the type check:


	#188e6 SYSEVAL		AND strings
	#188f5 SYSEVAL		OR strings
	#18904 SYSEVAL		XOR strings
	#18961 SYSEVAL		NOT string


   In fact, these routines can be appled to any object that is a
"vector" object, i.e. a type prefix followed by a 20-bit length
counting the length itself - Library data, GROB, String, and Binary.

   So I guess what need are +, -, *, /, and a few shift operations,
and we're all set!