DSER
DPRINTF(rcs, DSER, (CE_CONT, "REG[%d]<-$%02x", reg, val));
DPRINTF(rcs, DSER, (CE_CONT, "$%02x<-REG[%d]", val, reg));
DPRINTF(rcs, DSER, (CE_CONT, "serdev_receive: soft int handler\n"));