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From: wtm@neoucom.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: New IBM - first impression....
Message-ID: <546@neoucom.UUCP>
Date: Mon, 13-Apr-87 09:09:31 EST
Article-I.D.: neoucom.546
Posted: Mon Apr 13 09:09:31 1987
Date-Received: Tue, 14-Apr-87 23:46:30 EST
References: <1048@osiris.UUCP>
Organization: Northeastern Ohio Universities College of Medicine
Lines: 35
Keywords: PC/2....
Summary: I wonder if a NEC V30 would fit...

In article <1048@osiris.UUCP>, mjranum@osiris.UUCP (Marcus Ranum) writes:
> 
> 	Saw and played with new IBMs today. 
> 
> 1) Norton Sysinfo says it's 1.9 times the speed of a PC. I was not blown away
> 	by this. My 90$ 4-layer 8MHZ clone board is rather a bit faster than
> 	that.

Hmmm, I wonder if the 8086 could be replaced with a NEC V-30.  I
replaced the 8086 in my AT&T 6300 with a V-30 and the rperformance
as reported by Sysinfo was raised from 1.9 to 4.2.  Now, I don't
really believe that the performance boost was that dramatic in real
life, but the speed gain due to the V-30 is readily apparent in
day-to-day operation.

I suspect that Sysinfo must do some string manipulation as a major
part of its test.  I say that because the V-30 is optimized for
speed in this area.  For string searching, the V-30 will complete
an operation in about 1/3 the time an 8086 clocked at the same rate
requires.  The V-30 also performs integer multiplies at about twice
the speed of an 8086.  In other areas, such as integer addition,
the V-30 shows only marginal improvement.

Over all, the AT&T 6300 equipped with a V-30 operates about 0.7 the
speed of an 8 MHz IBM-AT.  Knowing IBM, that level of performace
would be too good for an entry level PC.  I't wouldn't surpirse me
if Brother Blue plays tricks in the POST like they did in AT to
prevent the machine from operating with a souped-up crystal. Or, in
this case, a V-30.

Bill Mayhew
Division of Basic Medical Sciences
Northeastern Ohio Universities College of Medicine
Rootstown, OH  44272  USA    phone:  216-325-2511
(wtm@neoucom.UUCP    ...!cbatt!neoucom!wtm)