Path: utzoo!mnetor!uunet!husc6!psuvax1!gondor.cs.psu.edu!przemek
From: przemek@gondor.cs.psu.edu (Przemyslaw Klosowski)
Newsgroups: comp.arch
Subject: Re: Cycle stretching
Message-ID: <3297@psuvax1.psu.edu>
Date: 17 Feb 88 20:49:37 GMT
References: <8802162251.AA20090@decwrl.dec.com>
Sender: netnews@psuvax1.psu.edu
Reply-To: przemek@gondor.cs.psu.edu (Przemyslaw Klosowski)
Organization: Penn State University
Lines: 13

In article <8802162251.AA20090@decwrl.dec.com> crabb@cadsys.dec.com (Charlie, SEG/CAD, HLO2-2/G13, (dtn 225)(617)568-5739) writes:
>>>Not a dumb question. Lots of older microcoded minis did exactly this in their
>>>microcode. They had a control field to slow down the clock (from 150ns. to
>>>180ns., for instance) when something slow came up, like a branch. I believe
>>>the first Prime was a machine that did this.
>	/Charlie Crabb !decwrl!cadsys.dec.com!crabb

Hey, I saw an old PDP (was it 8?) with a knob on the front panel, regulating
the clock frequency! you are pressed for time? turn it clockwise! (probably
at the expense of the error rate). I personally would rather implement it as
a foot operated lever under the operator console...   :^)
				przemek@psuvaxg.bitnet
				psuvax1!gondor!przemek