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Cream of the Crop 1
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Cream of the Crop 1.iso
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PROGRAM
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DJLSR106.ARJ
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SOUND.C
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C/C++ Source or Header
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1991-06-22
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905b
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31 lines
/* This is file SOUND.C */
/*
** Copyright (C) 1991 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
**
** This file is distributed under the terms listed in the document
** "copying.dj", available from DJ Delorie at the address above.
** A copy of "copying.dj" should accompany this file; if not, a copy
** should be available from where this file was obtained. This file
** may not be distributed without a verbatim copy of "copying.dj".
**
** This file is distributed WITHOUT ANY WARRANTY; without even the implied
** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "pc.h"
void sound(int freq)
{
int scale;
if (freq == 0)
{
outportb(0x61, inportb(0x61) & ~3);
return;
}
scale = 1193046 / freq;
outportb(0x43, 0xb6);
outportb(0x42, scale & 0xff);
outportb(0x42, scale >> 8);
outportb(0x61, inportb(0x61) | 3);
}