i386/119574: 7.0-RC1 times out in calibrate_clocks()

[Oliver B. Warzecha]

The following reply was made to PR i386/119574; it has been noted by GNATS.

From: "Oliver B. Warzecha" <obw at amarok.ping.de>
To: Bruce Evans <brde at optusnet.com.au>
Cc: FreeBSD-gnats-submit at FreeBSD.ORG, freebsd-i386 at FreeBSD.ORG
Subject: Re: i386/119574: 7.0-RC1 times out in calibrate_clocks()
Date: Wed, 6 Feb 2008 16:55:14 +0100

 Addon to my last mail, as I just discovered the i440BX-Specs, just
 2 clicks away from one of the pages where I last searched for info.
 They are downloadable from
 http://www.intel.com/design/intarch/datashts/290562.htm
 
 On page 84, there is specified that the RTC index register
 is write only (as I found out in practical testing :-). And it
 is also described as a latch register, which makes the current
 code "working by pure chance", as it's implementation dependent
 which bus noise happens on the other side of the gate. (If I
 didn't get the meaning of "latch" in this case totally wrong)
 
 regards,
 OBW