1 /* $OpenBSD: spkrio.h,v 1.1 1999/01/02 00:02:43 niklas Exp $ */ 2 /* $NetBSD: spkrio.h,v 1.1 1998/04/15 20:26:19 drochner Exp $ */ 3 4 /* 5 * spkr.h -- interface definitions for speaker ioctl() 6 */ 7 8 #ifndef _DEV_ISA_SPKR_H_ 9 #define _DEV_ISA_SPKR_H_ 10 11 #define SPKRTONE _IOW('S', 1, tone_t) /* emit tone */ 12 #define SPKRTUNE _IO('S', 2) /* emit tone sequence */ 13 14 typedef struct { 15 int frequency; /* in hertz */ 16 int duration; /* in 1/100ths of a second */ 17 } tone_t; 18 19 #endif /* _DEV_ISA_SPKR_H_ */ 20