| Op-Code: | PXENV_UNDI_STARTUP |
| Input: | ES:DI points to a t_PXENV_UNDI_STARTUP parameter structure that has been initialized by the caller. |
| Output: | PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE will be returned in AX, with the CF set accordingly. The status field in the parameter structure will be set to one of the values represented by the PXENV_STATUS_xxx constants. |
| Description: | This call provides the Universal NIC Driver with necessary startup parameters, such as the data segment and network adapter identification variables. This call hooks Interrupt 1Ah to export the UNDI API. The rest of the API will not be available until this call has been completed. The data segment must be zero-filled before this API call is made. |
| Note: | The entry point of the UNDI API must be at offset 0 of the UNDI code segment. The preboot code will install the UNDI API by making a far call to the API entry point, with ES:DI and BX setup for UNDI STARTUP. This service cannot be used in protected mode. |