public override void AtVsyncNMI()
{
if (Patch_Vectors)
{
NES.cpu.NMI = true;
}
//strobe pad
NES.WriteMemory(0x4016, 1);
NES.WriteMemory(0x4016, 0);
//read pad and create rising edge button signals so we dont trigger events as quickly as we hold the button down
int currButtons = 0;
for (int i = 0; i < 8; i++)
{
currButtons <<= 1;
currButtons |= (NES.ReadMemory(0x4016) & 1);
}
int justDown = (~ButtonState) & currButtons;
Bit a = (justDown >> 7) & 1;
Bit b = (justDown >> 6) & 1;
Bit sel = (justDown >> 5) & 1;
Bit start = (justDown >> 4) & 1;
Bit up = (justDown >> 3) & 1;
Bit down = (justDown >> 2) & 1;
Bit left = (justDown >> 1) & 1;
Bit right = (justDown >> 0) & 1;
ButtonState = currButtons;
//RIGHT: next song
//LEFT: prev song
//A: restart song
bool reset = false;
if (right)
{
CurrentSong++;
reset = true;
}
if (left)
{
CurrentSong--;
reset = true;
}
if (a)
{
reset = true;
}
if (reset)
{
ReplayInit();
}
}
public override void AtVsyncNmi()
{
if (Patch_Vectors)
{
NES.cpu.NMI = true;
}
//strobe pad
NES.WriteMemory(0x4016, 1);
NES.WriteMemory(0x4016, 0);
//read pad and create rising edge button signals so we don't trigger events as quickly as we hold the button down
int currButtons = 0;
for (int i = 0; i < 8; i++)
{
currButtons <<= 1;
currButtons |= (NES.ReadMemory(0x4016) & 1);
}
int justDown = (~ButtonState) & currButtons;
Bit a = (justDown >> 7) & 1;
Bit b = (justDown >> 6) & 1;
Bit sel = (justDown >> 5) & 1;
Bit start = (justDown >> 4) & 1;
Bit up = (justDown >> 3) & 1;
Bit down = (justDown >> 2) & 1;
Bit left = (justDown >> 1) & 1;
Bit right = (justDown >> 0) & 1;
ButtonState = currButtons;
//RIGHT: next song
//LEFT: prev song
//A: restart song
//RTC_Hijack :: control NSF from System Bus 0x00CE
ushort songChangeAdress = 0x00CE; //RTC_Hijack
byte songValue = NES.ReadMemory(songChangeAdress); //RTC_Hijack
bool reset = false;
if (right || (songValue == 0xFB)) //RTC_Hijack
{
NES.WriteMemory(songChangeAdress, 0xFF); //RTC_Hijack
if (CurrentSong < nsf.TotalSongs - 1)
{
CurrentSong++;
reset = true;
}
}
if (left || (songValue == 0xFA)) //RTC_Hijack
{
NES.WriteMemory(songChangeAdress, 0xFF); //RTC_Hijack
if (CurrentSong > 0)
{
CurrentSong--;
reset = true;
}
}
if (a)
{
reset = true;
}
if (reset)
{
ReplayInit();
}
}
public byte DummyReadMemory(ushort address) => _nes.ReadMemory(address);
