ES_SMPREG_INT_REGS
es1371_src_write(es, ES_SMPREG_DAC1 + ES_SMPREG_INT_REGS, 16 << 10);
es1371_src_write(es, ES_SMPREG_DAC2 + ES_SMPREG_INT_REGS, 16 << 10);
es1371_src_write(es, ES_SMPREG_ADC + ES_SMPREG_INT_REGS,
(es1371_src_read(es, ES_SMPREG_ADC + ES_SMPREG_INT_REGS) &
es1371_src_write(es, dac + ES_SMPREG_INT_REGS,
(es1371_src_read(es, dac + ES_SMPREG_INT_REGS) & 0x00ff) |