status.i4.v = get_453_device(, which_devices.i4a.r,
				     device_indices.i4a.r, errors.i2a.r
				     [,num_devices.i4.v] [,same_type.i4.v])

	This routine returns the device index for the requested database
	device on a C453 card.

	root_names	root name of family
			(dio_get_terse_name_length characters per device)
	which_devices	requested device or array of devices
			(C453_MAIN -> main parameter page device,
			 C453_TIME -> time table device,
			 C453_HI -> H(I) table device,
			 C453_MAP -> map device,
			 C453_SF -> scale factor device,
			 C453_VERSION -> version device,
			 C453_BULK_PARAM -> bulk PS parameter page
			 C453_GI_ABSC -> G(I) current table device,
			 C453_HI_ABSC -> H(I) current table device,
			 C453_CLOCK -> clock event table device,
			 C453_MDAT -> MDAT selection device,
			 C453_GI -> G(I) table device)
			(If a negative value is passed for this
			 argument, it's absolute value will be used
			 for every device requested.  This feature
			 cannot be used for type C453_MAIN.)
	device_indices	returned device index or array of device indices
	errors		returned device error or array of errors
	[num_devices]	number of devices (default is 1)
	[same_type]	flag whether or not all entries in
			"which_device" are the same
			(TRUE -> use first value in "which_device"
				 for every device requested,
			 FALSE -> each entry in "which_device" will
				  be treated as unique (default))

	This function returns ACNET status values as follows:

	OK			success
	CBS_MEMFAIL		dynamic memory allocation failure
	CBS_INVARG		invalid root name (no blanks)
	CBS_INVSIZ		invalid family size (database entry error)
	CBS_INVTYP		device is not a C453 module
	CBS_NO_SUCH		family device not found
	DIO_xxx			error retrieving database info

	This function requires the following include files:

	ul_cbsaux_h:auxlib_device_h, acnet_errors_h

	Related functions:

	get_453_family, get_453_channel, dio_get_terse_name_length,

	C/C++ usage:

	static const char	root_names[NUM_DEVICES*DEVICE_TERSE_NAME_LEN+1] =
	"I:H102  I:V103  ";
	short	errors[NUM_DEVICES];
	int	status;
	static const int	which_devices[NUM_DEVICES] =
	{C453_TIME, C453_TIME};
	int	device_indices[NUM_DEVICES];
	int	num_devices = NUM_DEVICES;
	int	same_type = FALSE;

	status = get_453_device(root_names,which_devices,device_indices,