LPS_INVERT
status = (lpt_status_read(sc) ^ LPS_INVERT) & LPS_MASK;
status = (status ^ LPS_INVERT) & LPS_MASK;
#define NOT_READY() ((bus_space_read_1(iot, ioh, lpt_status) ^ LPS_INVERT) & LPS_MASK)
status = pcc2_reg_read(sc, PCC2REG_PRT_INPUT_STATUS) ^ LPS_INVERT;
#define NOT_READY(ppbus) ((ppbus_rstr(ppbus)^LPS_INVERT)&LPS_MASK)
status = (status ^ LPS_INVERT) & LPS_MASK;