OHCI1394_IsochronousCycleTimer
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
reg_write(ohci, OHCI1394_IsochronousCycleTimer, value);