int ow_read_bit(int val) {
int rval;
portx_ctl |= OW_OUTEN;
ow_delay(val == 0 ? 60 : 1);
portx_ctl &= ~OW_OUTEN;
ow_delay(15);
rval = (portx_val & OW_OUTBIT) ? 1 : 0;
if (val != 0) ow_delay(45);
return rval;
}