silence           188 dev/isa/spkr.c 	int sound, silence, snum = 1, sdenom = 1;
silence           202 dev/isa/spkr.c 		silence = whole * (FILLTIME-fill) * snum /
silence           207 dev/isa/spkr.c 		    pitch, sound, silence);
silence           212 dev/isa/spkr.c 			rest(silence);