Format of PCI Configuration Data for Intel 82371AB (PIIX4), USB Controller:
Offset	Size	Description	)
 00h 64 BYTEs	header (see #00878)
		(vendor ID 8086h, device ID 7112h)
 20h	DWORD	I/O base address (for 32 contiguous PORTs)
!!!intel\29056201.pdf p.102
 40h 32 BYTEs	reserved
 60h	BYTE	USB specification release number
		00h pre-release 1.0
		10h release 1.0
 61h 95 BYTEs	reserved
 C0h	WORD	legacy support
 C2h 61 BYTEs	reserved
 FFh	BYTE	miscellaneous support
SeeAlso: #00873,#01100,#01103,#01105