This function initializes the serial device.
HANDLE COM_Init( ULONG Identifier );
Returns a pointer to the serial head, which then is passed as a device handle into the entry points COM_Open and COM_Deinit.
This function is called at device load time in order to perform any initialization. Typically, this function does as little as possible, postponing memory allocation and device power on to Open time.
This function is defined in the Mdd.c file.