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The C Users' Group Library 1994 August
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wc-cdrom-cusersgrouplibrary-1994-08.iso
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vol_100
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191_01
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spkrctl.c
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1986-05-25
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/* SPKRCTL.C Last update: 09 Feb 86 */
/* ------------------------------------------------------------ */
/* This is a portion of the SOUND EFFECTS LIBRARY. */
/* */
/* Copyright (C) 1986 by Paul Canniff. */
/* All rights reserved. */
/* */
/* This library has been placed into the public domain */
/* by the author. Use is granted for non-commercial */
/* pusposes, or as an IMBEDDED PORTION of a commercial */
/* product. */
/* */
/* Paul Canniff */
/* PO Box 1056 */
/* Marlton, NJ 08053 */
/* */
/* CompuServe ID: 73047,3715 */
/* */
/* ------------------------------------------------------------ */
#include <stdio.h>
#include "sound.h"
void spkr_cntr(n)
unsigned n;
{
unsigned lo_byte, hi_byte;
lo_byte = n & 0xff;
hi_byte = (n >> 8) & 0xff;
outp(SPKTMR+1,182);
outp(SPKTMR,lo_byte);
outp(SPKTMR,hi_byte);
}
void spkr_freq(f)
long f;
{
spkr_cntr(FREQ2CTR(f));
}
void spkr_on()
{
outp(KBCTL,inp(KBCTL)|0x3);
}
void spkr_off()
{
outp(KBCTL,inp(KBCTL)&0xfc);
}