suzukiplan/nestone.c

## nestone.c
/* ファミコンの音程 ($4002-$4003 に設定すべき値) */

#include <stdio.h>

#define S 44100.00
#define B 1.0594631
#define PI  3.1415926535897932
#define PI2 6.2831853071795864
#define CPU 1790000

int main(int argc,char* argv[])
{
    const char* t[12]={
        "A "
        ,"A#"
        ,"B "
        ,"C "
        ,"C#"
        ,"D "
        ,"D#"
        ,"E "
        ,"F "
        ,"F#"
        ,"G "
        ,"G#"
    };
    double hz[88];
    int n=0;
    double a=13.75;
    double b;
    short reg;
    for(n=0;n<88;n++) {
        if(n%12==0) {
            a*=2.0;
            hz[n]=a;
        } else {
            hz[n] = hz[n-1] * B;
        }
        b=PI2/(S/hz[n]);
        reg=(short)(CPU/(hz[n]*32)-1);
        printf("%s : %9.4fHz : $4002-$4003 = $%04X\n",t[n%12],hz[n],reg);
    }
    return 0;
}
	/* ファミコンの音程 ($4002-$4003 に設定すべき値) */

	#include <stdio.h>

	#define S 44100.00
	#define B 1.0594631
	#define PI 3.1415926535897932
	#define PI2 6.2831853071795864
	#define CPU 1790000

	int main(int argc,char* argv[])
	{
	const char* t[12]={
	"A "
	,"A#"
	,"B "
	,"C "
	,"C#"
	,"D "
	,"D#"
	,"E "
	,"F "
	,"F#"
	,"G "
	,"G#"
	};
	double hz[88];
	int n=0;
	double a=13.75;
	double b;
	short reg;
	for(n=0;n<88;n++) {
	if(n%12==0) {
	a*=2.0;
	hz[n]=a;
	} else {
	hz[n] = hz[n-1] * B;
	}
	b=PI2/(S/hz[n]);
	reg=(short)(CPU/(hz[n]*32)-1);
	printf("%s : %9.4fHz : $4002-$4003 = $%04X\n",t[n%12],hz[n],reg);
	}
	return 0;
	}