status.i4.v = gpib_serial_poll_c(poll_data.i1.r, gpib_address.i4.v)

	This routine returns the serial poll status byte from a GPIB device.
	A call to this routine must be preceded by a call to gpib_select_c.

	poll_data	serial poll status byte
	gpib_address	device's GPIB address (0-255)

	This function returns ACNET status values as follows:

	OK			success
	CBS_INVARG		invalid device address
	CBS_NODAT		VME interface device could not be retrieved
				for this GPIB address
	CBS_NOTYET		IP name specified device selected
	otherwise		GAS error

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	gpib_read_c, gpib_read_binary_c, gpib_write_c, gpib_select_node_c,
	gpib_select_ip_name_c, gpib_close, gpib_select_c, gpib_local_c,
	gpib_reboot, gpib_clear_c, gpib_trigger_c, gpib_get_device_c,
	gpib_device_info_c, gpib_maximum_buffer_length

	C/C++ usage:

	char	poll_data;
	int	status;
	int	gpib_address = 0;

	status = gpib_serial_poll_c(&poll_data,gpib_address);