als_mix_rd
v = als_mix_rd(sc, amt[dev].lreg) & ~mask;
v = als_mix_rd(sc, amt[dev].rreg) & ~mask;
v = als_mix_rd(sc, SB16_OMASK);
sb_status = als_mix_rd(sc, IRQ_STAT);
v = als_mix_rd(sc, ALS_SB16_CONFIG);