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Path: utzoo!linus!philabs!cmcl2!seismo!mcvax!boring!jack
From: jack@boring.UUCP
Newsgroups: net.arch
Subject: Re: Re: Re: RISC (really on multiplication d
Message-ID: <6557@boring.UUCP>
Date: Mon, 5-Aug-85 16:14:38 EDT
Article-I.D.: boring.6557
Posted: Mon Aug  5 16:14:38 1985
Date-Received: Wed, 7-Aug-85 00:38:45 EDT
References: <149@mips.UUCP> <600005@pbear.UUCP> <493@mmintl.UUCP> <233@weitek.UUCP> <1202@sjuvax.UUCP>
Reply-To: jack@boring.UUCP (Jack Jansen)
Organization: AMOEBA project, CWI, Amsterdam
Lines: 31
Apparently-To: rnews@mcvax.LOCAL

In article <1202@sjuvax.UUCP> jss@sjuvax.UUCP (J. Shapiro) writes:
<Included text about a machine that multiplies and divides two N
 bit numbers, giving an N bit result>
>For comparison and elucidation, so do:
>
>	VAX
Dunno, could be.
>	PDP-11
Wrong. Both MUL and DIV (If you don't own an 11/10, which doesn't
even have a DIV:-) use a register *pair* for a 32 bit quantity.
>	National 32016 and family
Right.
>	Motorola 68000, 68020
More-or-less right (though there's some tricky sign bit stuff, I 
remember).
>				6800
MUL? DIV???? WHoeaaaaaaa!!! You can be glad that it has an ADD and a
SUB!!
>					6809
Wrong. 8x8->16 multiply, and no DIV, I believe.
>	Zilog Z8000
Dunno.
>	Z80
Cannot DIV or MUL.
>	Intel 8086, 80186, 82086
Dunno.

Well, that kind of invalidates your point, I believe.
-- 
	Jack Jansen, jack@mcvax.UUCP
	The shell is my oyster.