Extensible Firmware Interface Specification
386 12/12/00 Version 1.02
Table G-5. UNDI CDB Field Definitions (continued)
Identifier Description
IFnum Interface Number
This field is used to identify which network adapter (S/W UNDI) or network connector
(H/W UNDI) this command is being sent to. If an invalid interface number is given, the
command will not execute and a StatCode of PXE_STATCODE_INVALID_CDB will be
returned.
Control Process Control
This bit field is used to control command UNDI inter-command processing. Setting
control bits that are not supported by the UNDI will cause the command execution to fail
with a StatCode of PXE_STATCODE_INVALID_CDB.
Bit 0x00: Another CDB follows this one (1) or this is the last or only CDB in the list (0).
Bit 0x01: Queue command if busy (1), fail if busy (0).
G.3 UNDI C Definitions
The definitions in this section are used to aid in the portability and readability of the example
32/64-bit S/W UNDI source code and the rest of this specification.
G.3.1 Portability Macros
These macros are used for storage and communication portability.
G.3.1.1 PXE_INTEL_ORDER or PXE_NETWORK_ORDER
This macro is used to control conditional compilation in the S/W UNDI source code. One of these
definitions needs to be uncommented in a common PXE header file.
//#define PXE_INTEL_ORDER 1 // Intel order
//#define PXE_NETWORK_ORDER 1 // network order
G.3.1.2 PXE_UINT64_SUPPORT or PXE_NO_UINT64_SUPPORT
This macro is used to control conditional compilation in the PXE source code. One of these
definitions must to be uncommented in the common PXE header file.
//#define PXE_UINT64_SUPPORT 1 // UINT64 supported
//#define PXE_NO_UINT64_SUPPORT 1 // UINT64 not supported
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