public void Write(byte value, ushort address)
{
if (address >= 0x4000 && address <= 0x4017)
{
Update();
switch (address & 0xFFFC)
{
case 0x4000:
square1.Write(value, (ushort)(address & 0x3));
break;
case 0x4004:
square2.Write(value, (ushort)(address & 0x3));
break;
case 0x4008:
triangle.Write(value, (ushort)(address & 0x3));
break;
case 0x400C:
noise.Write(value, (ushort)(address & 0x3));
break;
case 0x4010:
dmc.Write(value, (ushort)(address & 0x3));
break;
default:
switch (address)
{
case 0x4015:
square1.Write((byte)(value & 1), 4);
square2.Write((byte)(value & 2), 4);
triangle.Write((byte)(value & 4), 4);
noise.Write((byte)(value & 8), 4);
dmc.Write((byte)(value & 0x10), 4);
break;
case 0x4017: //APU Frame rate/ IRQ control
mode = (value & 0x80) != 0;
frameIRQInhibit = (value & 0x40) != 0;
if (frameIRQInhibit)
{
frameIRQ = false;
}
frameCounter = 0;
if (mode)
{
timeToClock = modeOneDelay;
}
else
{
timeToClock = modeZeroDelay;
}
if (currentTime % 2 == 1) //jitter, apu_test 4-jitter.nes
{
timeToClock++;
}
break;
}
break;
}
}
}
public override void Write(byte value, ushort address)
{
if (address >= 0x5000 && address <= 0x5017)
{
nes.APU.Update();
switch (address)
{
case 0x5000:
square1.Write(value, 0);
break;
case 0x5001:
square1.Write(value, 1);
break;
case 0x5002:
square1.Write(value, 2);
break;
case 0x5003:
square1.Write(value, 3);
break;
case 0x5004:
square2.Write(value, 0);
break;
case 0x5005:
square2.Write(value, 1);
break;
case 0x5006:
square2.Write(value, 2);
break;
case 0x5007:
square2.Write(value, 3);
break;
case 0x5010:
readMode = (value & 1) != 0;
irqEnable = (value & 0x80) != 0;
break;
case 0x5011:
if (!readMode)
{
if (value == 0)
{
irqTrip = true;
}
else
{
pcmData = value;
}
}
break;
case 0x5015:
square1.Write((byte)(value & 1), 4);
square2.Write((byte)(value & 2), 4);
break;
}
}
}
