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Bitfields for PCI Configuration CardBus CIS Pointer

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Bit Description

2 - 0

address space
000 - in device's device-specific configuration space
001 - in memory pointed to by base address register 0
010 - in memory pointed to by base address register 1
011 - in memory pointed to by base address register 2
100 - in memory pointed to by base address register 3
101 - in memory pointed to by base address register 4
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)

See Also:

#00878