Bitfields for Intel 82371MX Local Standby SMI Enable/Status registers:
Bit(s)	Description	)
 7-6	reserved
 5	IDE
 4	Audio
 3	COM
 2	DEV3
 1	DEV2
 0	DEV1
Note:	each bit in the Enable register turns on the associated SMI Timer; a
	  set bit in the Status register indicates which local standby timer
	  caused the SMI interrupt
SeeAlso: #01168,#01194,PORT xxxxh"Intel 82371"