pnozz_write_dac(p, DAC_INDX_HI, (offset & 0xff00) >> 8);
void pnozz_write_dac_ctl_reg(PnozzPtr p, int offset, unsigned char val){	pnozz_write_dac(p, DAC_INDX_LO, (offset & 0xff));	pnozz_write_dac(p, DAC_INDX_HI, (offset & 0xff00) >> 8);	pnozz_write_dac(p, DAC_INDX_DATA, val);}