dio_node

	status.i4.v = dio_node(device_indices.i4a.r, nodes.i4a.r, errors.i2a.r
			       [,num_devices.i4.r])

	This routine returns the source node for a device.  If "num_devices"
	is specified, nodes for a list of devices can be retrieved.

	device_indices	device index or array of device indices
	nodes		returned data source node or array of nodes
			(A value of NULL can be passed for this argument if
			 only caching of the node information is desired.)
			(constants are in 'nodedefs')
	errors		returned ACNET status value or array of status values
	[num_devices]	number of devices (default is 1)

	This function returns status values as follows:

	OK			success
	DIO_BADARG		invalid number of devices passed
	DIO_MEMFAIL		memory allocation failure
	negative value		ACNET format error indicating overall failure
	positive value		number of devices in error indicating partial
				success

	This function requires the following include files:

	diolib_h, nodedefs_h, acnet_errors_h

	Related functions:

	dio_dev_node, dio_enable_obsolete_dev_info,
	dio_disable_obsolete_dev_info, error_in_list(_c)

	C/C++ usage:

	short	errors[NUM_DEVICES];
	int	status;
	static const int	device_indices[NUM_DEVICES] = {14430, 14431};
	int	nodes[NUM_DEVICES];
	int	num_devices = NUM_DEVICES;

	status = dio_node(device_indices,nodes,errors,&num_devices);