If the device is configured as a COM port, Serial uses the port name to create a symbolic link name for the device. However, the device can be set to any non-NULL string. The name of a device is typically COM, where is a COM port number that the installer obtains from the COM port database. The following registry settings are under the Plug and Play registry key for a device. If a device-specific entry value is not present, Serial uses a Serial service value. Serial queries these registry entry values when it adds the device. Serial also uses these settings as a lower-level device filter driver for a device that requires a 16550 UART-compatible interface. This topic describes the registry settings that Serial uses as a function driver for a Plug and Play serial device.
