hp54500_num_screens (ul_scopes)

   hp54500_num_screens
	status.i4.v = hp54500_num_screens( dev_address.i4.v, num_on_chan.i4a.r,
					   num_screens.i4.r)

	Acquires channel on/off status and returns output to an array.
	Also returns how many screens are being displayed locally on the
	scope.

	dev_address	address of scope; A previos call to gpib_select()
			will have to be made to establish communication 
			to correct VME.

	num_on_chan     Returned array of ON/OFF status for each channel.
			Number of channels depends on Scope type.			

	num_screens	Returned number of screens that the scope is 
			displaying.



	This function returns ACNET status values as follows:

	CBS_OK			success
	otherwise		GAS error

	This function requires the following include files:

	ul_scopes_h:hpdefs_h

	Related functions:

	hp54500_change_dir, hp54500_display_wmem, hp54500_format_disk, 
	hp54500_get_disk_dir, hp54500_get_waveform, hp54500_init, 
	hp54500_load_from_disk, hp54500_message, hp54500_num_points,
	hp54500_set_acquire, hp54500_set_channel, hp54500_set_display,
	hp54500_set_root, hp54500_set_timebase, hp54500_set_trigger,
	hp54500_set_utilities, hp54500_set_waveform, hp54500_store_wmem,
	hp54500_write_to_disk, hp54500_num_screens, hp54500_del_disk_file.