Format of PCI Configuration Data for Intel 82557:
Offset	Size	Description	)
 00h 64 BYTEs	header (see #00878)
		(vendor ID 8086h, device ID 1229h) (see #00873)
 10h	DWORD	base address of memory-mapped Control/Status Registers (4K)
		(see #01228)
 14h	DWORD	base address of I/O-mapped Control/Status Registers (32 ports)
 18h	DWORD	base address of Flash memory (1M)
 40h 192 BYTEs	unused
SeeAlso: #01098