Bitfields for Intel 82378/82379 PCI Arbiter Control:
Bit(s)	Description	)
 7-5	reserveed (0)
 4-3	Master Retry Timer
	00 disabled (retries never masked)
	01 retries unmasked after 16 PCICLKs
	10 retries unmasked after 32 PCICLKs
	11 retries unmasked after 64 PCICLKs
 2	Bus Park
	=1 park CPUREQ# on PCI bus when 82378 detects PCI bus idle
 1	Bus Lock
	=0 resource lock
	=1 Bus lock
 0	Guaranteed Access Time
	=1 ISA bus masters are guaranteed 2.5 microsecond CHRDY time-out
SeeAlso: #01064,#01065