SK_IM_USECS
sk_win_write_4(sc, SK_Y2_LEV_ITIMERINIT, SK_IM_USECS(100));
sk_win_write_4(sc, SK_Y2_TX_ITIMERINIT, SK_IM_USECS(1000));
if (imr != SK_IM_USECS(sc->sk_int_mod)) {
SK_IM_USECS(sc->sk_int_mod));
sk_win_write_4(sc, SK_IMTIMERINIT, SK_IM_USECS(sc->sk_int_mod));
sk_win_write_4(sc, SK_IMTIMERINIT, SK_IM_USECS(sc->sk_int_mod));
if (imr != SK_IM_USECS(sc->sk_int_mod)) {
SK_IM_USECS(sc->sk_int_mod));