Bitfields for Intel 82437VX PCI TRDY timer:
Bit(s)	Description	)
 7-3	reserved
 2-0	TRDY timeout value
	000 2 PCICLKs
	001 4 PCICLKs
	010 6 PCICLKs
	011 8 PCICLKs
	1xx reserved
SeeAlso: #01108,#01123