Bitfields for Intel 82371MX Count Value registers:
Bit(s)	Description	)
 7-0	Count value
Note:	This field contains the initial count value for various time-out
	  events. 00 is an illegal programmed value. The programmed value is
	  decremented by certain events or system clocks, and the event is
	  triggered when the count reaches 0.
SeeAlso: #01168,PORT xxxxh"Intel 82371"