blt_get_pos_device

	status.i4.v = blt_get_pos_device(machine.i4.v, particle.i4.v,
					 bunch.i4.v, size.i4.v, request.s.r)

	This routine accepts an integer indicating the machine to be viewed,
	an integer indicating the particle (proton or pbar) an integer 
       indicating the bunch to be viewed, an integer indicating the
	number of datapoints to return with a maximum of 1024, and a 
	data structure to be filled with BLT positions.  Unlike blt_get_pos
       this function calls the separately created device arrays for
       the SDA data collection. CURRENTLY THIS WILL ONLY WORK WITH THE 
       BLT_TEST FRONT END. Any attempts to use other front ends will generate
       errors.

	machine		BLT_TEVATRON, BLT_MAIN_INJECTOR, BLT_TEST or
			BLT_RECYCLER as defined in ul_cbsaux:bltuti.h
	particle	BLT_PROTON or BLT_PBAR
	bunch		bunch to be viewed this number must be 
			between 0 and BLT_MAX_BATCH which at this time is 
			valued at 35.
	size		0 to 1024 position data points to be retrieved
	request		reference to a stucture of type BLT_POS to be 
			filled with the requested data

	It makes the appropriate calls, fills the structure and returns.

	This function returns ACNET status values as follows:

	OK			positions were collected without error.
	DIO_ERROR		positions were collected with errors.

	This function requires the following include files:

	ul_cbsaux_h:bltuti_h, ul_clib_h:acnet_errors_h

	Related functions:

	blt_get_data, blt_get_pos, blt_activate_spec, 
	blt_is_fresh, blt_get_tag

	C/C++ usage:

	int	status;
	int	machine = BLT_TEVATRON;
	int	particle = BLT_PROTON;
	int	bunch = 0;
	int	size = 1024;
	BLT_POS	positionSet;

	status = blt_get_pos(machine,particle,bunch,size,&dataSet);