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AxibugEmuOnline_old/AxibugEmuOnline.Client/Assets/VirtualNes.Core/NES.cs

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VirtuaNesCore翻译中
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using System;
using System.Collections.Generic;
using System.IO;
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using System.Text;
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using VirtualNes.Core.Debug;
namespace VirtualNes.Core
{
public class NES
{
public CPU cpu;
public PPU ppu;
public APU apu;
public ROM rom;
public PAD pad;
public Mapper mapper;
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public NesConfig nescfg;
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private List<CHEATCODE> m_CheatCode = new List<CHEATCODE>();
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private List<GENIECODE> m_GenieCode = new List<GENIECODE>();
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private bool m_bDiskThrottle;
private int m_CommandRequest;
private int m_nSnapNo;
private bool m_bNsfPlaying;
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private bool m_bNsfInit;
private int m_nNsfSongNo;
private int m_nNsfSongMode;
VirtuaNesCore翻译中
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private bool m_bMoviePlay;
private bool m_bMovieRec;
private Stream m_fpMovie;
private bool m_bTapePlay;
private bool m_bTapeRec;
private Stream m_fpTape;
private double m_TapeCycles;
private byte m_TapeIn;
private byte m_TapeOut;
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// For Barcode
private bool m_bBarcode;
private byte m_BarcodeOut;
private byte m_BarcodePtr;
private int m_BarcodeCycles;
private byte[] m_BarcodeData = new byte[256];
// For Barcode
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private bool m_bBarcode2;
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private int m_Barcode2seq;
private int m_Barcode2ptr;
private int m_Barcode2cnt;
private byte m_Barcode2bit;
private byte[] m_Barcode2data = new byte[32];
VirtuaNesCore翻译中
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private int m_TurboFileBank;
private int SAVERAM_SIZE;
private int nIRQtype;
private bool bFrameIRQ;
private bool bVideoMode;
翻译中
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private int NES_scanline;
private EnumRenderMethod RenderMethod;
private bool bZapper;
private long base_cycles;
private long emul_cycles;
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public NES(string fname)
{
Debuger.Log("VirtuaNES - CSharpCore\n");
m_bDiskThrottle = false;
m_CommandRequest = 0;
m_nSnapNo = 0;
m_bNsfPlaying = false;
m_bMoviePlay = m_bMovieRec = false;
m_fpMovie = null;
m_bTapePlay = m_bTapeRec = false;
m_fpTape = null;
m_TapeCycles = 0d;
m_TapeIn = m_TapeOut = 0;
m_bBarcode2 = false;
m_TurboFileBank = 0;
cpu = null;
ppu = null;
apu = null;
rom = null;
pad = null;
mapper = null;
SAVERAM_SIZE = 8 * 1024;
nIRQtype = 0;
bFrameIRQ = true;
bVideoMode = false;
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nescfg = NesConfig.NESCONFIG_NTSC;
VirtuaNesCore翻译中
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CheatInitial();
try
{
Debuger.Log("Allocating CPU...");
cpu = new CPU(this);
Debuger.Log("Allocating PPU...");
ppu = new PPU(this);
Debuger.Log("Allocating APU...");
apu = new APU(this);
Debuger.Log("Allocating PAD...");
pad = new PAD(this);
Debuger.Log("Loading ROM Image...");
rom = new ROM(fname);
}
catch (Exception ex)
{
Debuger.LogError(ex.ToString());
}
}
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public void Command(NESCOMMAND cmd)
{
CommandParam(cmd, 0);
}
public bool CommandParam(NESCOMMAND cmd, int param)
{
switch (cmd)
{
case NESCOMMAND.NESCMD_NONE: break;
case NESCOMMAND.NESCMD_HWRESET:
Reset();
m_CommandRequest = (int)cmd;
break;
case NESCOMMAND.NESCMD_SWRESET:
SoftReset();
m_CommandRequest = (int)cmd;
break;
default:
throw new NotImplementedException($"{cmd} not impl right now");
}
return true;
}
VirtuaNesCore翻译中
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public void CheatInitial()
{
m_CheatCode.Clear();
}
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public void EmulateFrame(bool bDraw)
{
int scanline = 0;
if (rom.IsNSF())
{
EmulateNSF();
return;
}
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CheatCodeProcess();
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NES_scanline = scanline;
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if (RenderMethod != EnumRenderMethod.TILE_RENDER)
{
bZapper = false;
while (true)
{
ppu.SetRenderScanline(scanline);
if (scanline == 0)
{
if (RenderMethod < EnumRenderMethod.POST_RENDER)
{
EmulationCPU(nescfg.ScanlineCycles);
}
}
}
}
}
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翻译中
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internal void EmulationCPU(int basecycles)
{
int cycles;
base_cycles += basecycles;
cycles = (int)((base_cycles / 12) - emul_cycles);
if (cycles > 0)
{
emul_cycles += cpu.EXEC(cycles);
}
}
internal void Reset()
{
SaveSRAM();
SaveDISK();
SaveTurboFile();
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// RAM Clear
MemoryUtility.ZEROMEMORY(MMU.RAM, (uint)MMU.RAM.Length);
if (rom.GetPROM_CRC() == 0x29401686)
{ // Minna no Taabou no Nakayoshi Dai Sakusen(J)
MemoryUtility.memset(MMU.RAM, 0xFF, (uint)MMU.RAM.Length);
}
// RAM set
if (!rom.IsSAVERAM() && rom.GetMapperNo() != 20)
{
MemoryUtility.memset(MMU.WRAM, 0xFF, (uint)MMU.WRAM.Length);
}
MemoryUtility.ZEROMEMORY(MMU.CRAM, (uint)MMU.CRAM.Length);
MemoryUtility.ZEROMEMORY(MMU.VRAM, (uint)MMU.VRAM.Length);
MemoryUtility.ZEROMEMORY(MMU.SPRAM, (uint)MMU.SPRAM.Length);
MemoryUtility.ZEROMEMORY(MMU.BGPAL, (uint)MMU.BGPAL.Length);
MemoryUtility.ZEROMEMORY(MMU.SPPAL, (uint)MMU.SPPAL.Length);
MemoryUtility.ZEROMEMORY(MMU.CPUREG, (uint)MMU.CPUREG.Length);
MemoryUtility.ZEROMEMORY(MMU.PPUREG, (uint)MMU.PPUREG.Length);
m_bDiskThrottle = false;
SetRenderMethod(EnumRenderMethod.PRE_RENDER);
if (rom.IsPAL())
{
SetVideoMode(true);
}
MMU.PROM = rom.GetPROM();
MMU.VROM = rom.GetVROM();
MMU.PROM_8K_SIZE = rom.GetPROM_SIZE() * 2;
MMU.PROM_16K_SIZE = rom.GetPROM_SIZE();
MMU.PROM_32K_SIZE = rom.GetPROM_SIZE() / 2;
MMU.VROM_1K_SIZE = rom.GetVROM_SIZE() * 8;
MMU.VROM_2K_SIZE = rom.GetVROM_SIZE() * 4;
MMU.VROM_4K_SIZE = rom.GetVROM_SIZE() * 2;
MMU.VROM_8K_SIZE = rom.GetVROM_SIZE();
// <20>f<EFBFBD>t<EFBFBD>H<EFBFBD><48><EFBFBD>g<EFBFBD>o<EFBFBD><6F><EFBFBD>N
if (MMU.VROM_8K_SIZE != 0)
{
MMU.SetVROM_8K_Bank(0);
}
else
{
MMU.SetCRAM_8K_Bank(0);
}
// <20>~<7E><><EFBFBD>[
if (rom.Is4SCREEN())
{
MMU.SetVRAM_Mirror(MMU.VRAM_MIRROR4);
}
else if (rom.IsVMIRROR())
{
MMU.SetVRAM_Mirror(MMU.VRAM_VMIRROR);
}
else
{
MMU.SetVRAM_Mirror(MMU.VRAM_HMIRROR);
}
apu.SelectExSound(0);
ppu.Reset();
mapper.Reset();
// Trainer
if (rom.IsTRAINER())
{
Array.Copy(rom.GetTRAINER(), 0, MMU.WRAM, 0x1000, 512);
}
pad.Reset();
cpu.Reset();
apu.Reset();
if (rom.IsNSF())
{
mapper.Reset();
}
base_cycles = emul_cycles = 0;
}
internal void SetVideoMode(bool bMode)
{
bVideoMode = bMode;
if (!bVideoMode)
{
nescfg = NesConfig.NESCONFIG_NTSC;
}
else
{
nescfg = NesConfig.NESCONFIG_PAL;
}
apu.SoundSetup();
}
public void SetRenderMethod(EnumRenderMethod type)
{
RenderMethod = type;
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}
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internal void SoftReset()
{
迭代
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pad.Reset();
cpu.Reset();
apu.Reset();
if (rom.IsNSF())
{
mapper.Reset();
}
m_bDiskThrottle = false;
base_cycles = emul_cycles = 0;
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}
internal void EmulateNSF()
{
迭代
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R6502 reg = null;
ppu.Reset();
mapper.VSync();
//DEBUGOUT( "Frame\n" );
if (m_bNsfPlaying)
{
if (m_bNsfInit)
{
MemoryUtility.ZEROMEMORY(MMU.RAM, (uint)MMU.RAM.Length);
if ((rom.GetNsfHeader().ExtraChipSelect & 0x04) == 0)
{
MemoryUtility.ZEROMEMORY(MMU.RAM, 0x2000);
}
apu.Reset();
apu.Write(0x4015, 0x0F);
apu.Write(0x4017, 0xC0);
apu.ExWrite(0x4080, 0x80); // FDS Volume 0
apu.ExWrite(0x408A, 0xE8); // FDS Envelope Speed
cpu.GetContext(ref reg);
reg.PC = 0x4710; // Init Address
reg.A = (byte)m_nNsfSongNo;
reg.X = (byte)m_nNsfSongMode;
reg.Y = 0;
reg.S = 0xFF;
reg.P = CPU.Z_FLAG | CPU.R_FLAG | CPU.I_FLAG;
// <20><><EFBFBD>S<EFBFBD>΍<EFBFBD><CE8D><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˂Ă<CB82><C482><EFBFBD><EFBFBD>ă<EFBFBD><C483>[<5B>v<EFBFBD><76>(1<>b<EFBFBD><62>)
for (int i = 0; i < nescfg.TotalScanlines * 60; i++)
{
EmulationCPU(nescfg.ScanlineCycles);
cpu.GetContext(ref reg);
// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>[<5B>v<EFBFBD>ɓ<EFBFBD><C993><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƃ<EFBFBD><C682>m<EFBFBD>F<EFBFBD><46><EFBFBD><EFBFBD><EFBFBD>甲<EFBFBD><E794B2><EFBFBD><EFBFBD>
if (reg.PC == 0x4700)
{
break;
}
}
m_bNsfInit = false;
}
cpu.GetContext(ref reg);
// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>[<5B>v<EFBFBD>ɓ<EFBFBD><C993><EFBFBD><EFBFBD>Ă<EFBFBD><C482><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Đݒ肷<DD92><E882B7>
if (reg.PC == 0x4700)
{
reg.PC = 0x4720; // Play Address
reg.A = 0;
reg.S = 0xFF;
}
for (int i = 0; i < nescfg.TotalScanlines; i++)
{
EmulationCPU(nescfg.ScanlineCycles);
}
}
else
{
cpu.GetContext(ref reg);
reg.PC = 0x4700; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>[<5B>v
reg.S = 0xFF;
EmulationCPU(nescfg.ScanlineCycles * nescfg.TotalScanlines);
}
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}
VirtuaNesCore翻译中
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翻译中
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internal void CheatCodeProcess()
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{
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//todo : ʵ<><CAB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
}
public void Dispose()
{
cpu?.Dispose();
ppu?.Dispose();
apu?.Dispose();
pad?.Dispose();
rom?.Dispose();
}
private void SaveSRAM()
{
int i;
if (rom.IsNSF()) return;
if (rom.IsSAVERAM()) return;
for (i = 0; i < SAVERAM_SIZE; i++)
{
迭代
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if (MMU.WRAM[i] != 0x00)
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break;
}
if (i < SAVERAM_SIZE)
{
var romName = rom.GetRomName();
Debuger.Log($"Saving SAVERAM...[{romName}]");
迭代
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Supporter.SaveSRAMToFile(MMU.WRAM, romName);
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}
}
private void SaveDISK()
{
if (rom.GetMapperNo() != 20)
return;
int i = 0;
Stream fp = null;
DISKFILEHDR ifh;
byte[] lpDisk = rom.GetPROM();
byte[] lpWrite = rom.GetDISK();
long DiskSize = 16 + 65500 * rom.GetDiskNo();
ulong data;
try
VirtuaNesCore翻译中
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{
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ifh = new DISKFILEHDR();
ifh.ID = ASCIIEncoding.ASCII.GetBytes("VirtuaNES DI");
ifh.BlockVersion = 0x0210;
ifh.ProgID = rom.GetGameID();
ifh.MakerID = (ushort)rom.GetMakerID();
ifh.DiskNo = (ushort)rom.GetDiskNo();
for (i = 16; i < DiskSize; i++)
{
if (lpWrite[i] > 0)
ifh.DifferentSize++;
}
if (ifh.DifferentSize == 0)
return;
List<byte> contents = new List<byte>();
contents.AddRange(ifh.ToBytes());
for (i = 16; i < DiskSize; i++)
{
if (lpWrite[i] > 0)
{
data = (ulong)(i & 0x00FFFFFF);
data |= ((ulong)lpDisk[i] & 0xFF) << 24;
contents.AddRange(BitConverter.GetBytes(data));
}
}
Supporter.SaveDISKToFile(contents.ToArray(), rom.GetRomName());
}
catch (Exception ex)
{
Debuger.LogError(ex.ToString());
}
}
private void SaveTurboFile()
{
//todo : ʵ<><CAB5>
}
internal void Clock(int cycles)
{
Tape(cycles);
Barcode(cycles);
}
private void Barcode(int cycles)
{
if (m_bBarcode)
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{
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m_BarcodeCycles += cycles;
if (m_BarcodeCycles > 1000)
{
m_BarcodeCycles = 0;
// <20><><EFBFBD>~<7E>H
if (m_BarcodeData[m_BarcodePtr] != 0xFF)
{
m_BarcodeOut = m_BarcodeData[m_BarcodePtr++];
}
else
{
m_bBarcode = false;
m_BarcodeOut = 0;
Debuger.Log("Barcode data trasnfer complete!!");
if (!(IsTapePlay() || IsTapeRec()))
{
cpu.SetClockProcess(false);
}
}
}
}
}
public bool IsTapeRec()
{
return m_bTapeRec;
}
public bool IsTapePlay()
{
return m_bTapePlay;
}
internal void Tape(int cycles)
{
//todo : ʵ<><CAB5>Tape (Ŀ<><C4BF><EFBFBD>Ǽ<EFBFBD>¼<EFBFBD><C2BC><EFBFBD>Ҳ<EFBFBD><D2B2><EFBFBD><EFBFBD><EFBFBD>Play,<2C><><EFBFBD>ȼ<EFBFBD><C8BC>ܵ<EFBFBD>)
VirtuaNesCore翻译中
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}
翻译中
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internal byte Read(ushort addr)
{
switch (addr >> 13)
{
case 0x00: // $0000-$1FFF
return MMU.RAM[addr & 0x07FF];
case 0x01: // $2000-$3FFF
return ppu.Read((ushort)(addr & 0xE007));
case 0x02: // $4000-$5FFF
if (addr < 0x4100)
{
return ReadReg(addr);
}
else
{
return mapper.ReadLow(addr);
}
case 0x03: // $6000-$7FFF
return mapper.ReadLow(addr);
case 0x04: // $8000-$9FFF
case 0x05: // $A000-$BFFF
case 0x06: // $C000-$DFFF
case 0x07: // $E000-$FFFF
迭代
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return MMU.CPU_MEM_BANK[addr >> 13].Span[addr & 0x1FFF];
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}
return 0x00; // Warning<6E>\<5C>h
}
private byte ReadReg(ushort addr)
{
switch (addr & 0xFF)
{
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x06:
case 0x07:
case 0x08:
case 0x09:
case 0x0A:
case 0x0B:
case 0x0C:
case 0x0D:
case 0x0E:
case 0x0F:
case 0x10:
case 0x11:
case 0x12:
case 0x13:
return apu.Read(addr);
case 0x15:
return apu.Read(addr);
case 0x14:
return (byte)(addr & 0xFF);
case 0x16:
if (rom.IsVSUNISYSTEM())
{
return pad.Read(addr);
}
else
{
return (byte)(pad.Read(addr) | 0x40 | m_TapeOut);
}
case 0x17:
if (rom.IsVSUNISYSTEM())
{
return pad.Read(addr);
}
else
{
return (byte)(pad.Read(addr) | apu.Read(addr));
}
default:
return mapper.ExRead(addr);
}
}
internal byte Barcode2()
{
byte ret = 0x00;
if (!m_bBarcode2 || m_Barcode2seq < 0)
return ret;
switch (m_Barcode2seq)
{
case 0:
m_Barcode2seq++;
m_Barcode2ptr = 0;
ret = 0x04; // d3
break;
case 1:
m_Barcode2seq++;
m_Barcode2bit = m_Barcode2data[m_Barcode2ptr];
m_Barcode2cnt = 0;
ret = 0x04; // d3
break;
case 2:
ret = (byte)((m_Barcode2bit & 0x01) != 0 ? 0x00 : 0x04); // Bit rev.
m_Barcode2bit >>= 1;
if (++m_Barcode2cnt > 7)
{
m_Barcode2seq++;
}
break;
case 3:
if (++m_Barcode2ptr > 19)
{
m_bBarcode2 = false;
m_Barcode2seq = -1;
}
else
{
m_Barcode2seq = 1;
}
break;
default:
break;
}
return ret;
}
翻译中
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迭代
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internal void Write(ushort addr, byte data)
{
switch (addr >> 13)
{
case 0x00: // $0000-$1FFF
MMU.RAM[addr & 0x07FF] = data;
break;
case 0x01: // $2000-$3FFF
if (!rom.IsNSF())
{
ppu.Write((ushort)(addr & 0xE007), data);
}
break;
case 0x02: // $4000-$5FFF
if (addr < 0x4100)
{
WriteReg(addr, data);
}
else
{
迭代
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mapper.WriteLow(addr, data);
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}
break;
case 0x03: // $6000-$7FFF
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mapper.WriteLow(addr, data);
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break;
case 0x04: // $8000-$9FFF
case 0x05: // $A000-$BFFF
case 0x06: // $C000-$DFFF
case 0x07: // $E000-$FFFF
迭代
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mapper.Write(addr, data);
迭代
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GenieCodeProcess();
break;
}
}
迭代
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private void GenieCodeProcess()
{
ushort addr;
for (int i = 0; i < m_GenieCode.Count; i++)
{
addr = m_GenieCode[i].address;
if ((addr & 0x8000) != 0)
{
// 8character codes
if (MMU.CPU_MEM_BANK[addr >> 13].Span[addr & 0x1FFF] == m_GenieCode[i].cmp)
{
MMU.CPU_MEM_BANK[addr >> 13].Span[addr & 0x1FFF] = m_GenieCode[i].data;
}
}
else
{
// 6character codes
addr |= 0x8000;
MMU.CPU_MEM_BANK[addr >> 13].Span[addr & 0x1FFF] = m_GenieCode[i].data;
}
}
}
迭代
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private void WriteReg(ushort addr, byte data)
{
switch (addr & 0xFF)
{
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x06:
case 0x07:
case 0x08:
case 0x09:
case 0x0A:
case 0x0B:
case 0x0C:
case 0x0D:
case 0x0E:
case 0x0F:
case 0x10:
case 0x11:
case 0x12:
case 0x13:
case 0x15:
apu.Write(addr, data);
MMU.CPUREG[addr & 0xFF] = data;
break;
case 0x14:
ppu.DMA(data);
cpu.DMA(514); // DMA Pending cycle
MMU.CPUREG[addr & 0xFF] = data;
break;
case 0x16:
mapper.ExWrite(addr, data); // For VS-Unisystem
pad.Write(addr, data);
迭代
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MMU.CPUREG[addr & 0xFF] = data;
迭代
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m_TapeIn = data;
break;
case 0x17:
迭代
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MMU.CPUREG[addr & 0xFF] = data;
pad.Write(addr, data);
apu.Write(addr, data);
迭代
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break;
// VirtuaNES<45>ŗL<C597>|<7C>[<5B>g
case 0x18:
迭代
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apu.Write(addr, data);
迭代
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break;
default:
迭代
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mapper.ExWrite(addr, data);
迭代
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break;
}
}
internal bool GetVideoMode()
{
return bVideoMode;
}
internal void SetFrameIRQmode(bool bMode)
{
bFrameIRQ = bMode;
}
internal bool GetFrameIRQmode()
{
return bFrameIRQ;
}
}
VirtuaNesCore翻译中
2024-07-23 18:31:59 +08:00
}
Reference in New Issue Copy Permalink