Intel Extensible Firmware Interface Specification page 433

G.3.5.6 PXE_DEVICE
This typedef is used to identify the network device that is being used by the UNDI. This
information is returned by the Get Config Info command.
#pragma pack(1)
typedef union pxe_device {
// PCI and PC Card NICs are both identified using bus, device
// and function numbers.
// Card services to be loaded in the BIOS or preboot
// environment.
struct {
// See S/W UNDI ROMID structure definition for PCI and
// PCC BusType definitions.
PXE_UINT32
// Bus, device & function numbers that locate this device.
PXE_UINT16
PXE_UINT8
PXE_UINT8
} PCI, PCC;
} PXE_DEVICE;
#pragma pack()
Version 1.02
For PC Card, this may require PC
BusType;
Bus;
Device;
Function;
12/12/00
32/64-bit UNDI Specification
415