Path: blob/master/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.Core.cs
2 views
using System;
using System.Linq;
using BizHawk.Common;
using BizHawk.Emulation.Common;
using BizHawk.Emulation.Cores.Components.M6502;
#pragma warning disable 162
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
public partial class NES : IEmulator
{
//hardware/state
public MOS6502X cpu;
int cpu_accumulate; //cpu timekeeper
public PPU ppu;
public APU apu;
public byte[] ram;
NESWatch[] sysbus_watch = new NESWatch[65536];
public byte[] CIRAM; //AKA nametables
string game_name = string.Empty; //friendly name exposed to user and used as filename base
CartInfo cart; //the current cart prototype. should be moved into the board, perhaps
internal INESBoard Board; //the board hardware that is currently driving things
EDetectionOrigin origin = EDetectionOrigin.None;
int sprdma_countdown;
bool _irq_apu; //various irq signals that get merged to the cpu irq pin
/// <summary>clock speed of the main cpu in hz</summary>
public int cpuclockrate { get; private set; }
//irq state management
public bool irq_apu { get { return _irq_apu; } set { _irq_apu = value; } }
//user configuration
int[] palette_compiled = new int[64 * 8];
//variable set when VS system games are running
internal bool _isVS = false;
//some VS games have a ppu that switches 2000 and 2001, so keep trcak of that
public byte _isVS2c05 = 0;
//since prg reg for VS System is set in the controller regs, it is convenient to have it here
//instead of in the board
public byte VS_chr_reg;
public byte VS_prg_reg;
//various VS controls
public byte[] VS_dips = new byte[8];
public byte VS_service = 0;
public byte VS_coin_inserted=0;
public byte VS_ROM_control;
// cheat addr index tracker
// disables all cheats each frame
public int[] cheat_indexes = new int[500];
public int num_cheats;
// new input system
NESControlSettings ControllerSettings; // this is stored internally so that a new change of settings won't replace
IControllerDeck ControllerDeck;
byte latched4016;
private DisplayType _display_type = DisplayType.NTSC;
//Sound config
public void SetSquare1(int v) { apu.Square1V = v; }
public void SetSquare2(int v) { apu.Square2V = v; }
public void SetTriangle(int v) { apu.TriangleV = v; }
public void SetNoise(int v) { apu.NoiseV = v; }
public void SetDMC(int v) { apu.DMCV = v; }
/// <summary>
/// for debugging only!
/// </summary>
/// <returns></returns>
public INESBoard GetBoard()
{
return Board;
}
public void Dispose()
{
if (magicSoundProvider != null)
magicSoundProvider.Dispose();
magicSoundProvider = null;
}
class MagicSoundProvider : ISoundProvider, IDisposable
{
BlipBuffer blip;
NES nes;
const int blipbuffsize = 4096;
public MagicSoundProvider(NES nes, uint infreq)
{
this.nes = nes;
blip = new BlipBuffer(blipbuffsize);
blip.SetRates(infreq, 44100);
//var actualMetaspu = new Sound.MetaspuSoundProvider(Sound.ESynchMethod.ESynchMethod_V);
//1.789773mhz NTSC
//resampler = new Sound.Utilities.SpeexResampler(2, infreq, 44100 * APU.DECIMATIONFACTOR, infreq, 44100, actualMetaspu.buffer.enqueue_samples);
//output = new Sound.Utilities.DCFilter(actualMetaspu);
}
public bool CanProvideAsync
{
get { return false; }
}
public SyncSoundMode SyncMode
{
get { return SyncSoundMode.Sync; }
}
public void SetSyncMode(SyncSoundMode mode)
{
if (mode != SyncSoundMode.Sync)
{
throw new NotSupportedException("Only sync mode is supported");
}
}
public void GetSamplesAsync(short[] samples)
{
throw new NotSupportedException("Async not supported");
}
public void GetSamplesSync(out short[] samples, out int nsamp)
{
//Console.WriteLine("ASync: {0}", nes.apu.dlist.Count);
foreach (var d in nes.apu.dlist)
blip.AddDelta(d.time, d.value);
nes.apu.dlist.Clear();
blip.EndFrame(nes.apu.sampleclock);
nes.apu.sampleclock = 0;
nsamp = blip.SamplesAvailable();
samples = new short[nsamp * 2];
blip.ReadSamples(samples, nsamp, true);
// duplicate to stereo
for (int i = 0; i < nsamp * 2; i += 2)
samples[i + 1] = samples[i];
nes.Board.ApplyCustomAudio(samples);
}
public void DiscardSamples()
{
nes.apu.dlist.Clear();
nes.apu.sampleclock = 0;
}
public void Dispose()
{
if (blip != null)
{
blip.Dispose();
blip = null;
}
}
}
MagicSoundProvider magicSoundProvider;
public void HardReset()
{
cpu = new MOS6502X();
cpu.SetCallbacks(ReadMemory, ReadMemory, PeekMemory, WriteMemory);
cpu.BCD_Enabled = false;
cpu.OnExecFetch = ExecFetch;
ppu = new PPU(this);
ram = new byte[0x800];
CIRAM = new byte[0x800];
// wire controllers
// todo: allow changing this
ControllerDeck = ControllerSettings.Instantiate(ppu.LightGunCallback);
// set controller definition first time only
if (ControllerDefinition == null)
{
ControllerDefinition = new ControllerDefinition(ControllerDeck.GetDefinition());
ControllerDefinition.Name = "NES Controller";
// controls other than the deck
ControllerDefinition.BoolButtons.Add("Power");
ControllerDefinition.BoolButtons.Add("Reset");
if (Board is FDS)
{
var b = Board as FDS;
ControllerDefinition.BoolButtons.Add("FDS Eject");
for (int i = 0; i < b.NumSides; i++)
ControllerDefinition.BoolButtons.Add("FDS Insert " + i);
}
if (_isVS)
{
ControllerDefinition.BoolButtons.Add("Insert Coin P1");
ControllerDefinition.BoolButtons.Add("Insert Coin P2");
ControllerDefinition.BoolButtons.Add("Service Switch");
}
}
// don't replace the magicSoundProvider on reset, as it's not needed
// if (magicSoundProvider != null) magicSoundProvider.Dispose();
// set up region
switch (_display_type)
{
case Common.DisplayType.PAL:
apu = new APU(this, apu, true);
ppu.region = PPU.Region.PAL;
CoreComm.VsyncNum = 50;
CoreComm.VsyncDen = 1;
cpuclockrate = 1662607;
cpu_sequence = cpu_sequence_PAL;
_display_type = DisplayType.PAL;
break;
case Common.DisplayType.NTSC:
apu = new APU(this, apu, false);
ppu.region = PPU.Region.NTSC;
CoreComm.VsyncNum = 39375000;
CoreComm.VsyncDen = 655171;
cpuclockrate = 1789773;
cpu_sequence = cpu_sequence_NTSC;
break;
// this is in bootgod, but not used at all
case Common.DisplayType.DENDY:
apu = new APU(this, apu, false);
ppu.region = PPU.Region.Dendy;
CoreComm.VsyncNum = 50;
CoreComm.VsyncDen = 1;
cpuclockrate = 1773448;
cpu_sequence = cpu_sequence_NTSC;
_display_type = DisplayType.DENDY;
break;
default:
throw new Exception("Unknown displaytype!");
}
if (magicSoundProvider == null)
magicSoundProvider = new MagicSoundProvider(this, (uint)cpuclockrate);
BoardSystemHardReset();
// apu has some specific power up bahaviour that we will emulate here
apu.NESHardReset();
if (SyncSettings.InitialWRamStatePattern != null && SyncSettings.InitialWRamStatePattern.Any())
{
for (int i = 0; i < 0x800; i++)
{
ram[i] = SyncSettings.InitialWRamStatePattern[i % SyncSettings.InitialWRamStatePattern.Count];
}
}
else
{
// check fceux's PowerNES and FCEU_MemoryRand function for more information:
// relevant games: Cybernoid; Minna no Taabou no Nakayoshi Daisakusen; Huang Di; and maybe mechanized attack
for (int i = 0; i < 0x800; i++)
{
if ((i & 4) != 0)
{
ram[i] = 0xFF;
}
else
{
ram[i] = 0x00;
}
}
}
SetupMemoryDomains();
//in this emulator, reset takes place instantaneously
cpu.PC = (ushort)(ReadMemory(0xFFFC) | (ReadMemory(0xFFFD) << 8));
cpu.P = 0x34;
cpu.S = 0xFD;
// some boards cannot have specific values in RAM upon initialization
// Let's hard code those cases here
// these will be defined through the gameDB exclusively for now.
if (cart.DB_GameInfo!=null)
{
if (cart.DB_GameInfo.Hash == "60FC5FA5B5ACCAF3AEFEBA73FC8BFFD3C4DAE558" // Camerica Golden 5
|| cart.DB_GameInfo.Hash == "BAD382331C30B22A908DA4BFF2759C25113CC26A" // Camerica Golden 5
|| cart.DB_GameInfo.Hash == "40409FEC8249EFDB772E6FFB2DCD41860C6CCA23" // Camerica Pegasus 4-in-1
)
{
ram[0x701] = 0xFF;
}
}
}
bool resetSignal;
bool hardResetSignal;
public void FrameAdvance(bool render, bool rendersound)
{
if (Tracer.Enabled)
cpu.TraceCallback = (s) => Tracer.Put(s);
else
cpu.TraceCallback = null;
lagged = true;
if (resetSignal)
{
Board.NESSoftReset();
cpu.NESSoftReset();
apu.NESSoftReset();
ppu.NESSoftReset();
}
else if (hardResetSignal)
{
HardReset();
}
Frame++;
//if (resetSignal)
//Controller.UnpressButton("Reset"); TODO fix this
resetSignal = Controller.IsPressed("Reset");
hardResetSignal = Controller.IsPressed("Power");
if (Board is FDS)
{
var b = Board as FDS;
if (Controller.IsPressed("FDS Eject"))
b.Eject();
for (int i = 0; i < b.NumSides; i++)
if (Controller.IsPressed("FDS Insert " + i))
b.InsertSide(i);
}
if (_isVS)
{
if (controller.IsPressed("Service Switch"))
VS_service = 1;
else
VS_service = 0;
if (controller.IsPressed("Insert Coin P1"))
VS_coin_inserted |= 1;
else
VS_coin_inserted &= 2;
if (controller.IsPressed("Insert Coin P2"))
VS_coin_inserted |= 2;
else
VS_coin_inserted &= 1;
}
ppu.FrameAdvance();
if (lagged)
{
_lagcount++;
islag = true;
}
else
islag = false;
videoProvider.FillFrameBuffer();
//turn off all cheats
for (int d=0;d<num_cheats;d++)
{
RemoveGameGenie(cheat_indexes[d]);
}
num_cheats = 0;
}
//PAL:
//0 15 30 45 60 -> 12 27 42 57 -> 9 24 39 54 -> 6 21 36 51 -> 3 18 33 48 -> 0
//sequence of ppu clocks per cpu clock: 3,3,3,3,4
//at least it should be, but something is off with that (start up time?) so it is 3,3,3,4,3 for now
//NTSC:
//sequence of ppu clocks per cpu clock: 3
ByteBuffer cpu_sequence;
static ByteBuffer cpu_sequence_NTSC = new ByteBuffer(new byte[] { 3, 3, 3, 3, 3 });
static ByteBuffer cpu_sequence_PAL = new ByteBuffer(new byte[] { 3, 3, 3, 4, 3 });
public int cpu_step, cpu_stepcounter, cpu_deadcounter;
public int oam_dma_index;
public bool oam_dma_exec = false;
public ushort oam_dma_addr;
public byte oam_dma_byte;
public bool dmc_dma_exec = false;
public bool dmc_realign;
public bool IRQ_delay;
public bool special_case_delay; // very ugly but the only option
public bool do_the_reread;
public byte DB; //old data bus values from previous reads
#if VS2012
[MethodImpl(MethodImplOptions.AggressiveInlining)]
#endif
internal void RunCpuOne()
{
cpu_stepcounter++;
if (cpu_stepcounter == cpu_sequence[cpu_step])
{
cpu_step++;
if (cpu_step == 5) cpu_step = 0;
cpu_stepcounter = 0;
///////////////////////////
// OAM DMA start
///////////////////////////
if (sprdma_countdown > 0)
{
sprdma_countdown--;
if (sprdma_countdown == 0)
{
if (cpu.TotalExecutedCycles % 2 == 0)
{
cpu_deadcounter = 2;
}
else
{
cpu_deadcounter = 1;
}
oam_dma_exec = true;
cpu.RDY = false;
oam_dma_index = 0;
special_case_delay = true;
}
}
if (oam_dma_exec && apu.dmc_dma_countdown != 1 && !dmc_realign)
{
if (cpu_deadcounter == 0)
{
if (oam_dma_index % 2 == 0)
{
oam_dma_byte = ReadMemory(oam_dma_addr);
oam_dma_addr++;
}
else
{
WriteMemory(0x2004, oam_dma_byte);
}
oam_dma_index++;
if (oam_dma_index == 512) oam_dma_exec = false;
}
else
{
cpu_deadcounter--;
}
}
else if (apu.dmc_dma_countdown == 1)
{
dmc_realign = true;
}
else if (dmc_realign)
{
dmc_realign = false;
}
/////////////////////////////
// OAM DMA end
/////////////////////////////
/////////////////////////////
// dmc dma start
/////////////////////////////
if (apu.dmc_dma_countdown > 0)
{
cpu.RDY = false;
dmc_dma_exec = true;
apu.dmc_dma_countdown--;
if (apu.dmc_dma_countdown == 0)
{
apu.RunDMCFetch();
dmc_dma_exec = false;
apu.dmc_dma_countdown = -1;
do_the_reread = true;
}
}
/////////////////////////////
// dmc dma end
/////////////////////////////
apu.RunOne(true);
if (cpu.RDY && !IRQ_delay)
{
cpu.IRQ = _irq_apu || Board.IRQSignal;
}
else if (special_case_delay || apu.dmc_dma_countdown == 3)
{
cpu.IRQ = _irq_apu || Board.IRQSignal;
special_case_delay = false;
}
cpu.ExecuteOne();
apu.RunOne(false);
if (ppu.double_2007_read > 0)
ppu.double_2007_read--;
if (do_the_reread && cpu.RDY)
do_the_reread = false;
if (IRQ_delay)
IRQ_delay = false;
if (!dmc_dma_exec && !oam_dma_exec && !cpu.RDY)
{
cpu.RDY = true;
IRQ_delay = true;
}
ppu.ppu_open_bus_decay(0);
Board.ClockCPU();
ppu.PostCpuInstructionOne();
}
}
#if VS2012
[MethodImpl(MethodImplOptions.AggressiveInlining)]
#endif
public byte ReadReg(int addr)
{
byte ret_spec;
switch (addr)
{
case 0x4000:
case 0x4001:
case 0x4002:
case 0x4003:
case 0x4004:
case 0x4005:
case 0x4006:
case 0x4007:
case 0x4008:
case 0x4009:
case 0x400A:
case 0x400B:
case 0x400C:
case 0x400D:
case 0x400E:
case 0x400F:
case 0x4010:
case 0x4011:
case 0x4012:
case 0x4013:
return DB;
//return apu.ReadReg(addr);
case 0x4014: /*OAM DMA*/ break;
case 0x4015: return (byte)((byte)(apu.ReadReg(addr) & 0xDF) + (byte)(DB & 0x20));
case 0x4016:
if (_isVS)
{
byte ret = 0;
ret = read_joyport(0x4016);
ret &= 1;
ret = (byte)(ret | (VS_service << 2) | (VS_dips[0] << 3) | (VS_dips[1] << 4) | (VS_coin_inserted << 5) | (VS_ROM_control<<7));
return ret;
}
else
{
// special hardware glitch case
ret_spec = read_joyport(addr);
if (do_the_reread && ppu.region==PPU.Region.NTSC)
{
ret_spec = read_joyport(addr);
do_the_reread = false;
}
return ret_spec;
}
case 0x4017:
if (_isVS)
{
byte ret = 0;
ret = read_joyport(0x4017);
ret &= 1;
ret = (byte)(ret | (VS_dips[2] << 2) | (VS_dips[3] << 3) | (VS_dips[4] << 4) | (VS_dips[5] << 5) | (VS_dips[6] << 6) | (VS_dips[7] << 7));
return ret;
}
else
{
// special hardware glitch case
ret_spec = read_joyport(addr);
if (do_the_reread && ppu.region == PPU.Region.NTSC)
{
ret_spec = read_joyport(addr);
do_the_reread = false;
}
return ret_spec;
}
default:
//Console.WriteLine("read register: {0:x4}", addr);
break;
}
return DB;
}
public byte PeekReg(int addr)
{
switch (addr)
{
case 0x4000:
case 0x4001:
case 0x4002:
case 0x4003:
case 0x4004:
case 0x4005:
case 0x4006:
case 0x4007:
case 0x4008:
case 0x4009:
case 0x400A:
case 0x400B:
case 0x400C:
case 0x400D:
case 0x400E:
case 0x400F:
case 0x4010:
case 0x4011:
case 0x4012:
case 0x4013:
return apu.PeekReg(addr);
case 0x4014: /*OAM DMA*/ break;
case 0x4015: return apu.PeekReg(addr);
case 0x4016:
case 0x4017:
return peek_joyport(addr);
default:
//Console.WriteLine("read register: {0:x4}", addr);
break;
}
return 0xFF;
}
void WriteReg(int addr, byte val)
{
switch (addr)
{
case 0x4000:
case 0x4001:
case 0x4002:
case 0x4003:
case 0x4004:
case 0x4005:
case 0x4006:
case 0x4007:
case 0x4008:
case 0x4009:
case 0x400A:
case 0x400B:
case 0x400C:
case 0x400D:
case 0x400E:
case 0x400F:
case 0x4010:
case 0x4011:
case 0x4012:
case 0x4013:
apu.WriteReg(addr, val);
break;
case 0x4014: Exec_OAMDma(val); break;
case 0x4015: apu.WriteReg(addr, val); break;
case 0x4016:
if (_isVS)
{
write_joyport(val);
VS_chr_reg = (byte)((val & 0x4)>>2);
//TODO: does other stuff for dual system
//this is actually different then assignment
VS_prg_reg = (byte)((val & 0x4)>>2);
}
else
{
write_joyport(val);
}
break;
case 0x4017: apu.WriteReg(addr, val); break;
default:
//Console.WriteLine("wrote register: {0:x4} = {1:x2}", addr, val);
break;
}
}
void write_joyport(byte value)
{
var si = new StrobeInfo(latched4016, value);
ControllerDeck.Strobe(si, Controller);
latched4016 = value;
}
byte read_joyport(int addr)
{
InputCallbacks.Call();
lagged = false;
byte ret = 0;
if (_isVS)
{
// for whatever reason, in VS left and right controller have swapped regs
ret = addr == 0x4017 ? ControllerDeck.ReadA(Controller) : ControllerDeck.ReadB(Controller);
}
else
{
ret = addr == 0x4016 ? ControllerDeck.ReadA(Controller) : ControllerDeck.ReadB(Controller);
}
ret &= 0x1f;
ret |= (byte)(0xe0 & DB);
return ret;
}
byte peek_joyport(int addr)
{
// at the moment, the new system doesn't support peeks
return 0;
}
void Exec_OAMDma(byte val)
{
//schedule a sprite dma event for beginning 1 cycle in the future.
//this receives 2 because thats just the way it works out.
oam_dma_addr = (ushort)(val << 8);
sprdma_countdown = 1;
}
/// <summary>
/// Sets the provided palette as current.
/// Applies the current deemph settings if needed to expand a 64-entry palette to 512
/// </summary>
public void SetPalette(byte[,] pal)
{
int nColors = pal.GetLength(0);
int nElems = pal.GetLength(1);
if (nColors == 512)
{
//just copy the palette directly
for (int c = 0; c < 64 * 8; c++)
{
int r = pal[c, 0];
int g = pal[c, 1];
int b = pal[c, 2];
palette_compiled[c] = (int)unchecked((int)0xFF000000 | (r << 16) | (g << 8) | b);
}
}
else
{
//expand using deemph
for (int i = 0; i < 64 * 8; i++)
{
int d = i >> 6;
int c = i & 63;
int r = pal[c, 0];
int g = pal[c, 1];
int b = pal[c, 2];
Palettes.ApplyDeemphasis(ref r, ref g, ref b, d);
palette_compiled[i] = (int)unchecked((int)0xFF000000 | (r << 16) | (g << 8) | b);
}
}
}
/// <summary>
/// looks up an internal NES pixel value to an rgb int (applying the core's current palette and assuming no deemph)
/// </summary>
public int LookupColor(int pixel)
{
return palette_compiled[pixel];
}
public byte DummyReadMemory(ushort addr) { return 0; }
private void ApplySystemBusPoke(int addr, byte value)
{
if (addr < 0x2000)
{
ram[(addr & 0x7FF)] = value;
}
else if (addr < 0x4000)
{
ppu.WriteReg((addr & 0x07), value);
}
else if (addr < 0x4020)
{
WriteReg(addr, value);
}
else
{
ApplyGameGenie(addr, value, null); //Apply a cheat to the remaining regions since they have no direct access, this may not be the best way to handle this situation
}
}
public byte PeekMemory(ushort addr)
{
byte ret;
if (addr >= 0x4020)
{
ret = Board.PeekCart(addr); //easy optimization, since rom reads are so common, move this up (reordering the rest of these elseifs is not easy)
}
else if (addr < 0x0800)
{
ret = ram[addr];
}
else if (addr < 0x2000)
{
ret = ram[addr & 0x7FF];
}
else if (addr < 0x4000)
{
ret = Board.PeekReg2xxx(addr);
}
else if (addr < 0x4020)
{
ret = PeekReg(addr); //we're not rebasing the register just to keep register names canonical
}
else
{
throw new Exception("Woopsie-doodle!");
ret = 0xFF;
}
return ret;
}
public void ExecFetch(ushort addr)
{
MemoryCallbacks.CallExecutes(addr);
}
public byte ReadMemory(ushort addr)
{
byte ret;
if (addr >= 0x8000)
{
ret = Board.ReadPRG(addr - 0x8000); //easy optimization, since rom reads are so common, move this up (reordering the rest of these elseifs is not easy)
}
else if (addr < 0x0800)
{
ret = ram[addr];
}
else if (addr < 0x2000)
{
ret = ram[addr & 0x7FF];
}
else if (addr < 0x4000)
{
ret = Board.ReadReg2xxx(addr);
}
else if (addr < 0x4020)
{
ret = ReadReg(addr); //we're not rebasing the register just to keep register names canonical
}
else if (addr < 0x6000)
{
ret = Board.ReadEXP(addr - 0x4000);
}
else
{
ret = Board.ReadWRAM(addr - 0x6000);
}
//handle breakpoints and stuff.
//the idea is that each core can implement its own watch class on an address which will track all the different kinds of monitors and breakpoints and etc.
//but since freeze is a common case, it was implemented through its own mechanisms
if (sysbus_watch[addr] != null)
{
sysbus_watch[addr].Sync();
ret = sysbus_watch[addr].ApplyGameGenie(ret);
}
MemoryCallbacks.CallReads(addr);
DB = ret;
return ret;
}
public void ApplyGameGenie(int addr, byte value, byte? compare)
{
if (addr < sysbus_watch.Length)
{
cheat_indexes[num_cheats] = addr;
num_cheats++;
GetWatch(NESWatch.EDomain.Sysbus, addr).SetGameGenie(compare, value);
}
}
public void RemoveGameGenie(int addr)
{
if (addr < sysbus_watch.Length)
{
GetWatch(NESWatch.EDomain.Sysbus, addr).RemoveGameGenie();
}
}
public void WriteMemory(ushort addr, byte value)
{
if (addr < 0x0800)
{
ram[addr] = value;
}
else if (addr < 0x2000)
{
ram[addr & 0x7FF] = value;
}
else if (addr < 0x4000)
{
Board.WriteReg2xxx(addr, value);
}
else if (addr < 0x4020)
{
WriteReg(addr, value); //we're not rebasing the register just to keep register names canonical
}
else if (addr < 0x6000)
{
Board.WriteEXP(addr - 0x4000, value);
}
else if (addr < 0x8000)
{
Board.WriteWRAM(addr - 0x6000, value);
}
else
{
Board.WritePRG(addr - 0x8000, value);
}
MemoryCallbacks.CallWrites(addr);
}
// the palette for each VS game needs to be chosen explicitly since there are 6 different ones.
public void PickVSPalette(CartInfo cart)
{
switch (cart.palette)
{
case "2C05": SetPalette(Palettes.palette_2c03_2c05); ppu.CurrentLuma = PPU.PaletteLuma2C03; break;
case "2C04-1": SetPalette(Palettes.palette_2c04_001); ppu.CurrentLuma = PPU.PaletteLuma2C04_1; break;
case "2C04-2": SetPalette(Palettes.palette_2c04_002); ppu.CurrentLuma = PPU.PaletteLuma2C04_2; break;
case "2C04-3": SetPalette(Palettes.palette_2c04_003); ppu.CurrentLuma = PPU.PaletteLuma2C04_3; break;
case "2C04-4": SetPalette(Palettes.palette_2c04_004); ppu.CurrentLuma = PPU.PaletteLuma2C04_4; break;
}
//since this will run for every VS game, let's get security setting too
//values below 16 are for the 2c05 PPU
//values 16,32,48 are for Namco games and dealt with in mapper 206
_isVS2c05 = (byte)(cart.vs_security & 15);
}
}
}