3.4.8 Experimental Media Types

A current list of the system-defined NdisMediumXxx types and their corresponding values appears in the registry under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
\NDIS\MediaTypes.

To add an experimental medium type and associated identifier for an under-development NIC driver, use the system registry editor, as follows:

1. Select the Edit menu Add Value option.

2. Enter a Value Name of the form NdisMediumMyNewMedium, where MyNewMedium is anything. Select the Data Type REG_DWORD. Click on OK.

3. Enter a hexadecimal value for the new medium in the range 0xffff0000 through 0xffffffff.

Defining an experimental medium type in this manner allows the NIC driver to return NdisMediumMyNewMedium temporarily in response to queries when the miniport initializes.

When the miniport for the new medium type is done, contact Microsoft to formally register the new medium type as one of the standard system-supported media type constants.