Subversion Repositories Shiroi

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
9 nishi 1 
/* $Id: sound.c 12 2024-08-29 04:19:08Z nishi $ */
2 
 
3 
#include "sound.h"
4 
 
5 
#include "io.h"
6 
 
7 
short psg_addr;
8 
short psg_data;
9 
 
10 
void beep(void){
12 nishi 11 
	_beep(1L * 1024 / 2);
9 nishi 12 
}
13 
 
14 
void _beep(unsigned long howlong){
15 
	if(psg_addr == -1) return;
16 
	unsigned long i;
17 
 
18 
	outp(psg_addr, 8);
19 
	outp(psg_data, 0x0f);
20 
 
21 
	outp(psg_addr, 0);
10 nishi 22 
	outp(psg_data, 0xb0);
9 nishi 23 
 
24 
	outp(psg_addr, 1);
25 
	outp(psg_data, 0x0);
26 
 
27 
	outp(psg_addr, 7);
28 
	outp(psg_data, 0x3e);
29 
 
30 
	for(i = 0; i < howlong; i++);
31 
 
32 
	outp(psg_addr, 7);
33 
	outp(psg_data, 0x3f);
34 
}
35 
 
36 
void sound_card(int t, int port){
37 
	if(t == 0x11){
38 
		psg_addr = port - 2;
39 
		psg_data = port - 1;
40 
	}
41 
}