Bitfields for Intel 82425EX local-bus IDE control register:
Bit(s)	Description	)
 1-0	primary/secondary PCI IDE enable
	00 IDE disabled
	01 primary (ports 01F0h-01F7h,03F6,03F7h)
	10 secondary (ports 0170h-017Fh,0376h,0377h)
	11 reserved
 3-2	fast timing bank drive select 1
	bit 2 = drive 0 enabled
	bit 3 = drive 1 enabled
 5-4	IORDY sample point Enable Drive Select
	bit 4 = drive 0 enabled
	bit 5 = drive 1 enabled
 7-6	reserved
 9-8	IORDY sample point
	00 6 clocks
	01 5 clocks
	10 4 clocks
	11 3 clocks
 12-10	recover time (000 = 8 PCI clocks, 001 = 7, ..., 101 = 3, 110/111 = 3)
 15-13	reserved
SeeAlso: #01083,#01084