wdr_cyl_hi
len = (CHP_READ_REG(chp, wdr_cyl_hi) << 8) |
wdc_c->r_cyl = CHP_READ_REG(chp, wdr_cyl_hi) << 8;
CHP_WRITE_REG(chp, wdr_cyl_hi, cylin >> 8);
CHP_WRITE_REG(chp, wdr_cyl_hi, 0x55);
CHP_READ_REG(chp, wdr_cyl_hi) != 0x55) {
ch = CHP_READ_REG(chp, wdr_cyl_hi);
ch = CHP_READ_REG(chp, wdr_cyl_hi);
chp->cmd_ioh, wdr_cyl_hi & _WDC_REGMASK);
ch = bus_space_read_2(chp->cmd_iot, iohs[wdr_cyl_hi], 0);
ch = CHP_READ_REG(chp, wdr_cyl_hi);
chp->cmd_ioh, wdr_cyl_hi & _WDC_REGMASK);