public void LoadTo(NES nes)
{
nes.SetMapper(this.Mapper);
nes.ppu.SetMapper(this.Mapper);
nes.cpu.SetMapper(this.Mapper);
this.fs.Close();
}
public Visual(NES nes)
{
InitializeComponent();
this.ClientSize = new Size((int)(scale * width), (int)(scale * height + MenuStripHeight));
this.nes = nes;
this.rawBitmap = nes.display;
// disable resizing
this.FormBorderStyle = FormBorderStyle.FixedSingle;
this.MinimizeBox = false;
this.MaximizeBox = false;
this.SetStyle(
ControlStyles.UserPaint |
ControlStyles.AllPaintingInWmPaint |
ControlStyles.DoubleBuffer, true
);
this.Text = "NES Emulator";
System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer();
timer.Interval = 17;
timer.Tick += new EventHandler(Tick);
timer.Start();
MenuStrip ms = new MenuStrip();
ToolStripMenuItem GameMenu = new ToolStripMenuItem("Game");
ToolStripMenuItem GameOpenItem = new ToolStripMenuItem("Open", null, new EventHandler(LoadGame));
ToolStripMenuItem GameDebugItem = new ToolStripMenuItem("Debug", null, new EventHandler(OpenDebug));
GameMenu.DropDownItems.Add(GameOpenItem);
GameMenu.DropDownItems.Add(GameDebugItem);
((ToolStripDropDownMenu)(GameMenu.DropDown)).ShowImageMargin = false;
((ToolStripDropDownMenu)(GameMenu.DropDown)).ShowCheckMargin = false;
// Assign the ToolStripMenuItem that displays
// the list of child forms.
ms.MdiWindowListItem = GameMenu;
// Add the window ToolStripMenuItem to the MenuStrip.
ms.Items.Add(GameMenu);
// Dock the MenuStrip to the top of the form.
ms.Dock = DockStyle.Top;
// The Form.MainMenuStrip property determines the merge target.
this.MainMenuStrip = ms;
// Add the MenuStrip last.
// This is important for correct placement in the z-order.
this.Controls.Add(ms);
this.Load += new EventHandler(Visual_CreateBackBuffer);
this.Paint += new PaintEventHandler(Visual_Paint);
this.KeyDown += new KeyEventHandler(Visual_KeyDown);
}
public APU(NES nes)
{
this.pulse1 = new Pulse(amplitude);
this.pulse2 = new Pulse(amplitude);
this.noise = new Noise(amplitude);
this.triangle = new Triangle(amplitude);
this.dmc = new DMC(amplitude, nes);
this.nes = nes;
}
static void Main()
{
int[] rawBitmap = new int[0x100 * 0xf0 * 3];
NES nes = new NES(rawBitmap);
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Visual vis = new Visual(nes);
Application.Run(vis);
}
public void UpdateVisual(NES nes)
{
if (nes.ppu == null)
{
return;
}
else if (nes.ppu.Mapper == null)
{
return;
}
int i, j;
// Copy Spritetables
byte lower, upper;
bool changed;
for (i = 0; i < 2; i++)
{
// Check if updating spritetable is necessary
changed = false;
for (int SampleY = 0; SampleY < 0x10; SampleY++)
{
for (int SampleX = 0; SampleX < 0x10; SampleX++)
{
lower = (byte)(nes.ppu[(i * 0x1000) + (SampleY * 0x100) + (SampleX * 0x10) + 4] >> 4);
upper = (byte)(nes.ppu[(i * 0x1000) + (SampleY * 0x100) + (SampleX * 0x10) + 4 + 8] >> 4);
if (this.PatternTablesRaw[i][(8 * SampleX + 3) + 128 * (8 * SampleY + 4)] !=
PPU.palette[nes.ppu[0x3f00 | (PaletteSelected << 2) | 2 * (upper & 0x01) | (lower & 0x01)] & 0x3f])
{
changed = true;
break;
}
}
if (changed)
{
break;
}
}
if (!changed)
{
continue;
}
for (int SpriteTableTileY = 0; SpriteTableTileY < 0x10; SpriteTableTileY++)
{
for (int SpriteTableTileX = 0; SpriteTableTileX < 0x10; SpriteTableTileX++)
{
for (int row = 0; row < 8; row++)
{
lower = nes.ppu[(i * 0x1000) + (SpriteTableTileY * 0x100) + (SpriteTableTileX * 0x10) + row];
upper = nes.ppu[(i * 0x1000) + (SpriteTableTileY * 0x100) + (SpriteTableTileX * 0x10) + row + 8];
for (byte bit = 0; bit < 8; bit++)
{
this.PatternTablesRaw[i][(8 * SpriteTableTileX + (7 - bit)) + 128 * (8 * SpriteTableTileY + row)] =
PPU.palette[nes.ppu[0x3f00 | (PaletteSelected << 2) | 2 * (upper & 0x01) | (lower & 0x01)] & 0x3f];
upper >>= 1;
lower >>= 1;
}
}
}
}
if (i == 0)
{
this.PatternTable0Bmp?.Dispose();
rawBitmap = GCHandle.Alloc(this.PatternTablesRaw[0], GCHandleType.Pinned);
this.PatternTable0Bmp = new Bitmap(128, 128, 128 * 4,
PixelFormat.Format32bppRgb, rawBitmap.AddrOfPinnedObject());
this.PatternTable0.Image = PatternTable0Bmp;
rawBitmap.Free();
}
else
{
this.PatternTable1Bmp?.Dispose();
rawBitmap = GCHandle.Alloc(this.PatternTablesRaw[1], GCHandleType.Pinned);
this.PatternTable1Bmp = new Bitmap(128, 128, 128 * 4,
PixelFormat.Format32bppRgb, rawBitmap.AddrOfPinnedObject());
this.PatternTable1.Image = PatternTable1Bmp;
rawBitmap.Free();
}
}
// Copy Palette
for (i = 0; i < 8; i++)
{
changed = false;
for (j = 0; j < 4; j++)
{
if (this.PalettesRaw[i][j] != PPU.palette[nes.ppu[0x3f00 | (i << 2) | j] & 0x3f])
{
this.PalettesRaw[i][j] = PPU.palette[nes.ppu[0x3f00 | (i << 2) | j] & 0x3f];
changed = true;
}
}
if (!changed)
{
continue;
}
Graphics g = Graphics.FromImage(this.Palettes[i]);
g.Clear(Color.White);
for (j = 0; j < 4; j++)
{
g.FillRectangle(new SolidBrush(Color.FromArgb((int)(this.PalettesRaw[i][j] | 0xff00_0000))), 31 * j, 0, 31, 31);
}
this.PaletteBoxes[i].Image = this.Palettes[i];
}
// Copy OAM
StringBuilder sb = new StringBuilder(64 * 23);
for (i = 0; i < 64; i++)
{
sb.AppendLine(string.Format("{0:d2}: Y:{1:x2} T:{2:x2} A:{3:x2} X:{4:x2}",
i, nes.ppu.oam[4 * i], nes.ppu.oam[4 * i + 1], nes.ppu.oam[4 * i + 2], nes.ppu.oam[4 * i + 3]));
}
this.OAMText.Text = sb.ToString();
// Update CPU values
this.AContent.Text = nes.cpu.ac.ToString("X2");
this.XContent.Text = nes.cpu.x.ToString("X2");
this.YContent.Text = nes.cpu.y.ToString("X2");
this.PCContent.Text = nes.cpu.getPc().ToString("X4");
this.NFlag.ForeColor = nes.cpu.getFlag('N') == 1 ? Color.Green : Color.Red;
this.VFlag.ForeColor = nes.cpu.getFlag('V') == 1 ? Color.Green : Color.Red;
this.BFlag.ForeColor = nes.cpu.getFlag('B') == 1 ? Color.Green : Color.Red;
this.IFlag.ForeColor = nes.cpu.getFlag('I') == 1 ? Color.Green : Color.Red;
this.ZFlag.ForeColor = nes.cpu.getFlag('Z') == 1 ? Color.Green : Color.Red;
this.CFlag.ForeColor = nes.cpu.getFlag('C') == 1 ? Color.Green : Color.Red;
}
public CPU(NES nes)
{
// initialize memory
this.nes = nes;
this.storage = new byte[0x4020];
// memory map from https://wiki.nesdev.com/w/index.php/CPU_memory_map
this.pc = new byte[2];
this.pc[0] = new byte();
this.pc[1] = new byte();
this.ac = 0;
this.x = 0;
this.y = 0;
this.sr = 0x24;
this.sp = 0x00;
this.cycle = 0;
// load opcodes
string opcodeJson = File.ReadAllText("../../data/AllOpcodes.json");
Dictionary <string, string> opcodes = JsonConvert.DeserializeObject <Dictionary <string, string> >(opcodeJson);
this.instructions = new InstructionCaller[0x100];
foreach (KeyValuePair <string, string> entry in opcodes)
{
string[] instructionString = entry.Value.Split(' ');
Func <InstructionMode, int> instruction;
switch (instructionString[0])
{
case "ADC": instruction = this.ADC; break;
case "ALR": instruction = this.ALR; break;
case "AND": instruction = this.AND; break;
case "ARR": instruction = this.ARR; break;
case "ASL": instruction = this.ASL; break;
case "BCC": instruction = this.BCC; break;
case "BCS": instruction = this.BCS; break;
case "BEQ": instruction = this.BEQ; break;
case "BIT": instruction = this.BIT; break;
case "BMI": instruction = this.BMI; break;
case "BNE": instruction = this.BNE; break;
case "BPL": instruction = this.BPL; break;
case "BRK": instruction = this.BRK; break;
case "BVC": instruction = this.BVC; break;
case "BVS": instruction = this.BVS; break;
case "CLC": instruction = this.CLC; break;
case "CLD": instruction = this.CLD; break;
case "CLI": instruction = this.CLI; break;
case "CLV": instruction = this.CLV; break;
case "CMP": instruction = this.CMP; break;
case "CPX": instruction = this.CPX; break;
case "CPY": instruction = this.CPY; break;
case "DCP": instruction = this.DCP; break;
case "DEC": instruction = this.DEC; break;
case "DEX": instruction = this.DEX; break;
case "DEY": instruction = this.DEY; break;
case "EOR": instruction = this.EOR; break;
case "INC": instruction = this.INC; break;
case "INX": instruction = this.INX; break;
case "INY": instruction = this.INY; break;
case "ISC": instruction = this.ISC; break;
case "LAX": instruction = this.LAX; break;
case "LDA": instruction = this.LDA; break;
case "LDX": instruction = this.LDX; break;
case "LDY": instruction = this.LDY; break;
case "LSR": instruction = this.LSR; break;
case "NOP": instruction = this.NOP; break;
case "ORA": instruction = this.ORA; break;
case "PHA": instruction = this.PHA; break;
case "PHP": instruction = this.PHP; break;
case "PLA": instruction = this.PLA; break;
case "PLP": instruction = this.PLP; break;
case "RLA": instruction = this.RLA; break;
case "ROL": instruction = this.ROL; break;
case "ROR": instruction = this.ROR; break;
case "RRA": instruction = this.RRA; break;
case "RTI": instruction = this.RTI; break;
case "RTS": instruction = this.RTS; break;
case "SAX": instruction = this.SAX; break;
case "SBC": instruction = this.SBC; break;
case "SEC": instruction = this.SEC; break;
case "SED": instruction = this.SED; break;
case "SEI": instruction = this.SEI; break;
case "SLO": instruction = this.SLO; break;
case "SRE": instruction = this.SRE; break;
case "STA": instruction = this.STA; break;
case "STX": instruction = this.STX; break;
case "STY": instruction = this.STY; break;
case "TAX": instruction = this.TAX; break;
case "TAY": instruction = this.TAY; break;
case "TSX": instruction = this.TSX; break;
case "TXA": instruction = this.TXA; break;
case "TXS": instruction = this.TXS; break;
case "TYA": instruction = this.TYA; break;
case "XAA": instruction = this.XAA; break;
case "JSR": instruction = this.JSR; break;
case "JMP": instruction = this.JMP; break;
default: throw new Exception("Unknown instruction: " + instructionString[0]);
}
InstructionMode mode;
switch (instructionString[1])
{
case "A": mode = InstructionMode.A; break;
case "abs": mode = InstructionMode.abs; break;
case "abs,X": mode = InstructionMode.absX; break;
case "abs,Y": mode = InstructionMode.absY; break;
case "#": mode = InstructionMode.imm; break;
case "impl": mode = InstructionMode.impl; break;
case "ind": mode = InstructionMode.ind; break;
case "X,ind": mode = InstructionMode.Xind; break;
case "ind,Y": mode = InstructionMode.indY; break;
case "rel": mode = InstructionMode.rel; break;
case "zpg": mode = InstructionMode.zpg; break;
case "zpg,X": mode = InstructionMode.zpgX; break;
case "zpg,Y": mode = InstructionMode.zpgY; break;
default: throw new Exception("Unknown mode: " + instructionString[1]);
}
if (instruction != null)
{
this.instructions[int.Parse(entry.Key, NumberStyles.HexNumber)] = new InstructionCaller(instruction, mode);
}
}
}
