Subject: Re: High-resolution clcoks (time vultures on pmaxes)?
To: Chris G Demetriou <Chris_G_Demetriou@LAGAVULIN.PDL.CS.CMU.EDU>
From: Marc Evans <marc@Destek.Net>
List: port-pmax
Date: 01/28/1995 21:45:11
> > The Dave Mills paper in SIGCOMM 94 describes the 5k/240 as having a
> > high-resolution  25 MHz clock as part of the TurboChannel
> > interface on one of the ASICs.
> Is this paper anywhere around, online?
> Looking at the TC docs i have around (most of which apply to later
> DEC hardware, anyway), i can't seem to find a reference to this.  Do
> you know what ASIC it's on?

As I recall, it is in the SCC which is included in the 3max+, 3min, and 
maxine. The pmax and 3max don't have the SCC, and hence could not use any code 
specific to the chip. I seem to recall using the counter for some kernel 
performance hacking we did long ago...

- Marc
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