RT_DATA_OFF        85 dev/isa/radiotrack.c 	sc->lm.wzcl = RT_WREN_ON | RT_CLCK_OFF | RT_DATA_OFF;
RT_DATA_OFF        86 dev/isa/radiotrack.c 	sc->lm.wzch = RT_WREN_ON | RT_CLCK_ON  | RT_DATA_OFF;