MAXFRAMES
struct irt_frame sc_frames[MAXFRAMES];
for (i = 0; i < MAXFRAMES; i++)
for (i = 0; i < MAXFRAMES; i++)
for (i = 0; i < MAXFRAMES; i++)
if (sc->sc_nframes >= MAXFRAMES) {
sc->sc_framei = (sc->sc_framei+1) % MAXFRAMES;
sc->sc_frameo = (sc->sc_frameo+1) % MAXFRAMES;