EMU_ADCBA
emu_wrptr(sc, 0, EMU_ADCBA, 0);
emu_wrptr(sc, 0, EMU_ADCBA, 0);
ch->basereg = EMU_ADCBA;
ch->basereg = EMU_ADCBA;
emu_wrptr(sc, 0, EMU_ADCBA, 0);
emu_wrptr(sc, 0, EMU_ADCBA, 0);