Bitfields for Intel chipset ISA I/O recovery timer register:
Bit(s)	Description	)
 7	(82425EX/82371) DMA reserved page register aliasing disable
	=0 ports 0090h-009Fh alias ports 0080h-008Fh
	=1 ports 0090h-009Fh forwarded to ISA bus
 6	8-bit I/O recovery enable
 5-3	8-bit I/O recovery time
	000 = 8 SYSCLKs
	001-110 = 1-7 SYSCLKs
 2	16-bit I/O recovery enable
 1-0	16-bit I/O recovery time
	00 = 4 SYSCLKs
	01-11 = 1-3 SYSCLKs
SeeAlso: #01064,#01083,#01084,#01167,#01170