* and that DS is on a long word boundary.
siopinitialize(sc)	struct siop_softc *sc;{	/*	 * Need to check that scripts is on a long word boundary	 * and that DS is on a long word boundary.	 * Also should verify that dev doesn't span non-contiguous	 * physical pages.	 */	sc->sc_scriptspa = kvtop(scripts);	sc->sc_tcp[1] = 1000 / sc->sc_clock_freq;	sc->sc_tcp[2] = 1500 / sc->sc_clock_freq;	sc->sc_tcp[3] = 2000 / sc->sc_clock_freq;	sc->sc_minsync = sc->sc_tcp[1];		/* in 4ns units */	if (sc->sc_minsync < 25)		sc->sc_minsync = 25;#if not_used	if (sc->sc_clock_freq <= 25)		sc->sc_tcp[0] = sc->sc_tcp[1];	else if (sc->sc_clock_freq <= 37)		sc->sc_tcp[0] = sc->sc_tcp[2];	else if (sc->sc_clock_freq <= 50)		sc->sc_tcp[0] = sc->sc_tcp[3];	else		sc->sc_tcp[0] = 3000 / sc->sc_clock_freq;#endif	siopreset (sc);}