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