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Format of Extended System Configuration Data PCI ECD Extension Function

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Offset Size Description

00h

WORD

length of this structure (at least 001Eh, up to 0056h)

02h

BYTE

01h (selection size)

03h

BYTE

00h (selection data)

04h

BYTE

C0h (function information byte) (see #01252)

05h

BYTE

size of following free-format data (at least 18h, max 50h)

06h

16 BYTEs

freeform board header (see #01246)

16h

8N BYTEs

PCI board ID (see #01247) for one to eight boards

Note:

ECD = Extended Configuration Data; this structure must be the last "function" for a particular PCI board.
AMI BIOS v1.00.05.AX1 sets the length field to 001Ch for entries with a single board ID, apparently treating the field as the length of the remainder of the structure instead of the full structure's length.

See Also:

#01249