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Get VS Zapper working 

Now Duck Hunt and Gumshoe work, and other VS Zapper games hsould as well.
Hurray!
This commit is contained in:
alyosha-tas 2016-10-31 22:09:26 -04:00 committed by GitHub
parent 88589cb59b
commit d1b1f1a5ac
1 changed files with 26 additions and 5 deletions
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31
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NESControllers.cs
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@ -607,6 +607,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
/// </summary
public Func<int, int, bool> PPUCallback { get; set; }
bool resetting = false;
uint latchedvalue = 0;
static ControllerDefinition Definition = new ControllerDefinition
{
BoolButtons = { "0Fire" },
@ -614,18 +617,34 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
FloatRanges = { new[] { 0.0f, 128.0f, 255.0f }, new[] { 0.0f, 120.0f, 239.0f } }
};
void Latch(IController c)
{
byte ret = 0;
if (c["0Fire"])
ret |= 0x80;
if (PPUCallback((int)c.GetFloat("0Zapper X"), (int)c.GetFloat("0Zapper Y")))
ret |= 0x40;
ret |= 0x10; // always 1
latchedvalue = ret;
latchedvalue |= 0xFFFFFF00;
}
public void Strobe(StrobeInfo s, IController c)
{
resetting = s.OUT0 != 0;
if (s.OUT0 < s.OUT0old)
Latch(c);
}
// NES controller port interface
public byte Read(IController c)
{
byte ret = 0;
if (c["0Fire"])
ret |= 0x10;
if (!PPUCallback((int)c.GetFloat("0Zapper X"), (int)c.GetFloat("0Zapper Y")))
ret |= 0x08;
if (resetting)
Latch(c);
byte ret = (byte)(latchedvalue & 1);
if (!resetting)
latchedvalue >>= 1; // ASR not LSR, so endless stream of 1s after data
return ret;
}
@ -636,6 +655,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
public void SyncState(Serializer ser)
{
ser.Sync("restting", ref resetting);
ser.Sync("latchedvalue", ref latchedvalue);
}
// famicom expansion hookups