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

[Oliver B. Warzecha]

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