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From: shonle@csu-cs.UUCP (Greg Shonle)
Newsgroups: net.micro.pc
Subject: Re: Speeding up the AT
Message-ID: <2683@csu-cs.UUCP>
Date: Thu, 21-Feb-85 02:25:06 EST
Article-I.D.: csu-cs.2683
Posted: Thu Feb 21 02:25:06 1985
Date-Received: Tue, 26-Feb-85 20:12:18 EST
References: <2652@csu-cs.UUCP> <1500026@iuvax.UUCP>
Organization: Colo State Univ - CS Dept (Ft Collins, CO)
Lines: 12

[fnord!]

Just to set the record straight, the 80286 ALWAYS divides the external
clock speed by 2.  Ie, the current 12mhz clock gives a 6mhz effective
speed.  18mhz->9mhz effective.  The 80287 can either use the external
clock line directly, or it can divide by 3.  The AT divides by 3.  This
is controlled by one of the pins.  Therefore, the AT's 287 runs at 4mhz.
Speaking of speeding things up, does anyone know where one can
buy 8-10mhz 286's and 6mhz 287's in small quantities?

				    Greg Shonle
	 ...!{boulder,cires,denelcor,hao,hplabs,mit-vax,unmvax}!csu-cs!shonle