Subject: Re: Two pmaxes, no one boots
To: None <email@example.com>
From: Simon Burge <firstname.lastname@example.org>
Date: 11/21/2002 18:26:24
Thor Lancelot Simon wrote:
> On Thu, Nov 21, 2002 at 12:28:54AM -0500, email@example.com wrote:
> > On Wed, 20 Nov 2002, Thor Lancelot Simon wrote:
> > > > so it looks like it's an R2000 after all. whaddya know...
> > >
> > > The R2000 and R3000 instruction sets are the same.
> > >
> > > The only difference between the 2100 and 3100 is clock rate.
> > Is there any difference in implementation? Or only clock rate?
> The R2000 and R3000 are different implementations of the same instruction
> set; the R3000 achieved higher clock rates. The follow-on to the R3000
> was the R6000, which implemented an instruction set much more like that
> of modern 32-bit MIPS processors, but which was very expensive, had supply
> problems, and ran quite hot -- unsurprising, since it was implemented in
> Both the DS2100 and DS3100 use the R2000 CPU. IIRC, the 2100 runs at
> 14MHz and the 3100 runs at 16MHz. The DS5000/200 uses the R3000 CPU,
> at 25MHz as I recall.
Look at http://www.netbsd.org/Ports/pmax/models.html.
A quick summary:
2100: R2000 @ 12.5MHz
3100: R2000 @ 16.67MHz
5100: R3000 @ 20MHz
5000/200: R3000 @ 25MHz
5500: R3000 @ 30MHz
The bible (See MIPS Run) says that the R3000 is a "midlife kicker".
Comparing the R2000 to the R3000, it says:
"It's almost identical from the programmers viewpoint,
although small hardware enchancements combined to give
a substantial boost to performace."
Simon Burge <firstname.lastname@example.org>
NetBSD Support and Service: http://www.wasabisystems.com/