Bitfields for PCI Configuration CardBus CIS Pointer:
Bit(s)	Description	)
 2-0	address space
	000 in device's device-specific configuration space
	001 in memory pointed to by base address register 0
	...
	110 in memory pointed to by base address register 5
	111 in device's expansion ROM
 27-3	offset within address space defined by bits 2-0
 31-28	ROM image number (when address space is expansion ROM)
SeeAlso: #00878