WDC_WRITE_REG
#define WDC_WRITE_REG(chp, reg, val) outb((chp)->c_cmdreg[(reg)], (val))
#define WDC_WRITE_REG(chp, reg, val) *(chp)->c_cmdreg[(reg)] = (val)
#define WDC_WRITE_REG(chp, reg, val) *(chp)->c_cmdreg[(reg)] = (val)
#define WDC_WRITE_REG(chp, reg, val) do { \