Ay_Apu.cpp File Reference

#include "Ay_Apu.h"
#include "blargg_source.h"

Macros
#define	ENTRY(n)
#define	MODE(a0, a1, b0, b1, c0, c1)

Variables
unsigned const	inaudible_freq = 16384
int const	period_factor = 16
static byte const	amp_table [16]
static byte const	modes [8]
int const	noise_off = 0x08
int const	tone_off = 0x01

Macro Definition Documentation

ENTRY

#define ENTRY

(

n

)

Value:

byte (n * Ay_Apu::amp_range + 0.5)

MODE

#define MODE	(		a0,
			a1,
			b0,
			b1,
			c0,
			c1 )

Value:

(a0 | a1<<1 | b0<<2 | b1<<3 | c0<<4 | c1<<5)

Variable Documentation

amp_table

byte const amp_table[16]

static

Initial value:

                             =
{
#define ENTRY( n )                                   
        
        
        ENTRY(0.000000),ENTRY(0.007813),ENTRY(0.011049),ENTRY(0.015625),
        ENTRY(0.022097),ENTRY(0.031250),ENTRY(0.044194),ENTRY(0.062500),
        ENTRY(0.088388),ENTRY(0.125000),ENTRY(0.176777),ENTRY(0.250000),
        ENTRY(0.353553),ENTRY(0.500000),ENTRY(0.707107),ENTRY(1.000000),
        
        
 
}

inaudible_freq

unsigned const inaudible_freq = 16384

modes

byte const modes[8]

static

Initial value:

                         =
{
#define MODE( a0,a1, b0,b1, c0,c1 ) \
                                                            
        MODE( 1,0, 1,0, 1,0 ),
        MODE( 1,0, 0,0, 0,0 ),
        MODE( 1,0, 0,1, 1,0 ),
        MODE( 1,0, 1,1, 1,1 ),
        MODE( 0,1, 0,1, 0,1 ),
        MODE( 0,1, 1,1, 1,1 ),
        MODE( 0,1, 1,0, 0,1 ),
        MODE( 0,1, 0,0, 0,0 ),
}

noise_off

int const noise_off = 0x08

period_factor

int const period_factor = 16

tone_off

int const tone_off = 0x01