Intel Extensible Firmware Interface, Specification

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SIMPLE_NETWORK Protocol
Version 1.02 12/12/00 303
16-bit UNDI and 32/64-bit S/W UNDI:
Id
contains the address of the first byte of the copy of the
!PXE
structure in the relocated UNDI code segment. See the Preboot
Execution Environment (PXE) Specification and Appendix G.
H/W UNDI:
Id
contains the address of the
!PXE
structure.
ImageAddr
Address of the un-relocated network interface image.
16-bit UNDI:
ImageAddr
is the address of the PXE option ROM image in upper
memory.
32/64-bit S/W UNDI:
ImageAddr
is the address of the un-relocated S/W UNDI image.
H/W UNDI:
ImageAddr
contains zero.
ImageSize
Size of un-relocated network interface image.
16-bit UNDI:
ImageSize
is the size of the PXE option ROM image in upper
memory.
32/64-bit S/W UNDI:
ImageSize
is the size of the un-relocated S/W UNDI image.
H/W UNDI:
ImageSize
contains zero.
StringId
A four-character ASCII string that is sent in the class identifier field of
option 60 in DHCP. For a
Type
of
EfiNetworkInterfaceUndi
,
this field is "UNDI".
Type
Network interface type. This will be set to one of the values in
EFI_NETWORK_INTERFACE_TYPE
(See “Related Definitions”).