sys/dev/isa/spkrio.h

   1 /*      $NetBSD: spkr.h,v 1.3 1994/10/27 04:16:27 cgd 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_ */