c
c tdc detail common
c
c tdc header word
c tdc_status   status of tdc data (1 is ok)
c tdc_n_data   number of tdc data words minus one
c tdc_i_event  tdc event number
c
c tdc data words
c tdc_data(i)        tdc values for tdc channel i (0 to 7)
c tdc_data_status(i) tdc channel i status word (0 is ok)
c
c beware that the tdc channels are not necessarily ordered.
c for example, tdc_n_data can equal 2 and the only valid data could be in
c tdc_data(0), tdc_data(3) and tdc_data(6)
c channel  0   contains the TDC value
c channels 1-2 used by the calibration people;
c channels 3-4 contain clock information;
c channels 5-7 unused
c
      integer tdc_status, tdc_n_data, tdc_i_event
      integer tdc_data(0:7), tdc_data_status(0:7)
c
      common/ssstds/ tdc_status,
     +               tdc_n_data,
     +               tdc_i_event,
     +               tdc_data,
     +               tdc_data_status