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Format of PCI Configuration Data for Intel 82371AB (PIIX4), USB Controller

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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)
???

40h

32 BYTEs

reserved

60h

BYTE

USB specification release number
00 = pre-release 1.0
01 = release 1.0

61h

95 BYTEs

reserved

C0h

WORD

legacy support

C2h

61 BYTEs

reserved

FFh

BYTE

miscellaneous support

See Also:

#00873,#01100,#01103,#01105