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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_200
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240_01
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sound.c
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1987-07-30
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154 lines
#include "ciao.h"
/*
** sound generation primitives
*/
void setfrq( frequency ) unsigned frequency;
{
static int C;
static long Hz = 1193180;
C = Hz / frequency;
outp( 67, 182 );
outp( 66, C % 256 );
outp( 66, C / 256 );
}
void spkron()
{
static int bits;
bits = inp( 97 );
outp( 97, (char) (bits | 0x03) );
}
void spkroff()
{
static int bits;
bits = inp( 97 );
outp( 97, (char) (bits & 0xFC) );
}
/*
** generate tone f for duration d
** f = 0 is silence for duration d
*/
void note( f,d ) unsigned f,d;
{
if ( f > 0)
{
setfrq( f );
spkron();
while ( d-- > 0)
;
spkroff();
}
else
{
d = d = d;
while ( d-- > 0)
;
}
}
/*
** musical gadgets:
** all respond to the tone flag
*/
int tone = 1; /* controls whether the music gadgets make noise or not */
void HIclack()
{
if (tone)
{
note ( 466, 38 );
note ( 1865, 27 );
note ( 466, 60 );
note ( 1865, 30 );
note ( 466, 28 );
note ( 1865, 17 );
}
}
void LOclack()
{
if (tone)
{
note ( 392, 38 );
note ( 1568, 27 );
note ( 392, 60 );
note ( 1568, 30 );
note ( 392, 28 );
note ( 1568, 17 );
}
}
void bopbleet()
{
if (tone)
{
note ( 587, 2000 );
note ( 784, 4000 );
note ( 880, 2000 );
}
}
void blopbloop()
{
if (tone)
{
note ( 392, 4000 );
note ( 440, 2000 );
note ( 294, 2000 );
}
}
void thurb()
{
if (tone)
{
note ( 46, 250 );
note ( 185, 600 );
note ( 740, 350 );
note ( 46, 150 );
note ( 185, 800 );
note ( 740, 250 );
note ( 46, 250 );
note ( 185, 600 );
note ( 740, 350 ); /* 3200 */
note ( 46, 250 );
note ( 185, 600 );
note ( 740, 350 );
note ( 46, 400 );
note ( 185, 400 );
note ( 740, 400 );
note ( 46, 250 );
note ( 185, 600 );
note ( 740, 350 ); /* 6400 */
note ( 98, 1600 ); /* 8000 */
}
}