Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!microsoft!brianw
From: brianw@microsoft.UUCP (Brian WILLOUGHBY)
Newsgroups: comp.sys.apple2
Subject: Re: MIPS
Message-ID: <60235@microsoft.UUCP>
Date: 3 Jan 91 02:21:10 GMT
References: <9012120353.AA26625@apple.com> <1990Dec12.064925.28609@nntp-server.caltech.edu> <9690@pasteur.Berkeley.EDU> <10564@ucrmath.ucr.edu>
Reply-To: brianw@microsoft.UUCP (Brian WILLOUGHBY)
Organization: Microsoft Corp., Redmond WA
Lines: 21

In article <10564@ucrmath.ucr.edu> rhyde@ucrmath.ucr.edu (randy hyde) writes:
>I'm not sure what you're getting at.  A VAX is a 32-bit computer.
>It can do a 32-bit memory-to-memory addition with a single instruction.
>I dunno how long this takes, but it is much faster than the 13 6502
>instruction (average- 3 cycles each) to do the same job.
>Perhaps you could clarify your comment.
>*** Randy Hyde O-)

If you "dunno" how long it takes on a Vax, then how can you possibly
say it takes less time than a 6502?  If you were to actually look up
the number of cycles needed for a 32 bit memory to memory addition,
you would no doubt be surprised at how many cycles it does take.  The
65x02 has some of the lowest cycle counts for processors in its price
rance (I'm not counting pipelined, multi-register RISC chips, even
though the 6502 was one of the first processors to use pipelining).

Brian Willoughby
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