void _WriteReg(int addr, byte val)
{
//Console.WriteLine("{0:X4} = {1:X2}", addr, val);
int index = addr - 0x4000;
int reg = index & 3;
int channel = index >> 2;
switch (channel)
{
case 0:
pulse[0].WriteReg(reg, val);
break;
case 1:
pulse[1].WriteReg(reg, val);
break;
case 2:
triangle.WriteReg(reg, val);
break;
case 3:
noise.WriteReg(reg, val);
break;
case 4:
dmc.WriteReg(reg, val);
break;
case 5:
if (addr == 0x4015)
{
pulse[0].set_lenctr_en(val & 1);
pulse[1].set_lenctr_en((val >> 1) & 1);
triangle.set_lenctr_en((val >> 2) & 1);
noise.set_lenctr_en((val >> 3) & 1);
dmc.set_lenctr_en(val.Bit(4));
}
else if (addr == 0x4017)
{
//Console.WriteLine("apu 4017 = {0:X2}", val);
sequencer_mode = (val >> 7) & 1;
sequencer_irq_inhibit = (val >> 6) & 1;
if (sequencer_irq_inhibit == 1)
{
sequencer_irq_clear_pending = true;
}
sequence_reset_pending = true;
break;
}
break;
}
}
void _WriteReg(int addr, byte val)
{
//Console.WriteLine("{0:X4} = {1:X2}", addr, val);
int index = addr - 0x4000;
int reg = index & 3;
int channel = index >> 2;
switch (channel)
{
case 0:
pulse[0].WriteReg(reg, val);
break;
case 1:
pulse[1].WriteReg(reg, val);
break;
case 2:
triangle.WriteReg(reg, val);
break;
case 3:
noise.WriteReg(reg, val);
break;
case 4:
dmc.WriteReg(reg, val);
break;
case 5:
if (addr == 0x4015)
{
pulse[0].set_lenctr_en(val & 1);
pulse[1].set_lenctr_en((val >> 1) & 1);
triangle.set_lenctr_en((val >> 2) & 1);
noise.set_lenctr_en((val >> 3) & 1);
dmc.set_lenctr_en(val.Bit(4));
}
else if (addr == 0x4017)
{
if (dmc.timer%2==0)
{
seq_tick = 3;
} else
{
seq_tick = 4;
}
seq_val = val;
}
break;
}
}