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Changed the structure of the emulator

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This commit is contained in:
Marc Parsons
2026-04-20 14:31:06 +01:00
parent 7464b29fca
commit adbf64a84d
6 changed files with 296 additions and 240 deletions
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6
Core/Memory/MemoryBus.cs
View File

@@ -60,10 +60,6 @@ namespace Core.Memory
// Copy the ROM
Array.Copy(romData, 0, _memory, 0, romData.Length);
}
public void ClearRam()
{
//To Do
}
}
}

127
Desktop/DebuggerForm.Designer.cs generated
View File

@@ -28,6 +28,7 @@
/// </summary>
private void InitializeComponent()
{
components = new System.ComponentModel.Container();
lblAF = new Label();
lblBC = new Label();
lblDE = new Label();
@@ -54,94 +55,95 @@
lblIff2 = new Label();
lblIE = new Label();
btnReset = new Button();
uiUpdateTimer = new System.Windows.Forms.Timer(components);
SuspendLayout();
//
// lblAF
//
lblAF.AutoSize = true;
lblAF.Location = new Point(12, 9);
lblAF.Location = new Point(10, 7);
lblAF.Margin = new Padding(2, 0, 2, 0);
lblAF.Name = "lblAF";
lblAF.Size = new Size(33, 25);
lblAF.Size = new Size(26, 20);
lblAF.TabIndex = 0;
lblAF.Text = "AF";
//
// lblBC
//
lblBC.AutoSize = true;
lblBC.Location = new Point(11, 60);
lblBC.Location = new Point(9, 48);
lblBC.Margin = new Padding(2, 0, 2, 0);
lblBC.Name = "lblBC";
lblBC.Size = new Size(33, 25);
lblBC.Size = new Size(27, 20);
lblBC.TabIndex = 1;
lblBC.Text = "BC";
//
// lblDE
//
lblDE.AutoSize = true;
lblDE.Location = new Point(12, 125);
lblDE.Location = new Point(10, 100);
lblDE.Margin = new Padding(2, 0, 2, 0);
lblDE.Name = "lblDE";
lblDE.Size = new Size(34, 25);
lblDE.Size = new Size(28, 20);
lblDE.TabIndex = 2;
lblDE.Text = "DE";
//
// lblHL
//
lblHL.AutoSize = true;
lblHL.Location = new Point(12, 188);
lblHL.Location = new Point(10, 150);
lblHL.Margin = new Padding(2, 0, 2, 0);
lblHL.Name = "lblHL";
lblHL.Size = new Size(33, 25);
lblHL.Size = new Size(27, 20);
lblHL.TabIndex = 3;
lblHL.Text = "HL";
//
// lblPC
//
lblPC.AutoSize = true;
lblPC.Location = new Point(11, 250);
lblPC.Location = new Point(9, 200);
lblPC.Margin = new Padding(2, 0, 2, 0);
lblPC.Name = "lblPC";
lblPC.Size = new Size(33, 25);
lblPC.Size = new Size(26, 20);
lblPC.TabIndex = 4;
lblPC.Text = "PC";
//
// lblSP
//
lblSP.AutoSize = true;
lblSP.Location = new Point(11, 315);
lblSP.Location = new Point(9, 252);
lblSP.Margin = new Padding(2, 0, 2, 0);
lblSP.Name = "lblSP";
lblSP.Size = new Size(32, 25);
lblSP.Size = new Size(25, 20);
lblSP.TabIndex = 6;
lblSP.Text = "SP";
//
// lblFlags
//
lblFlags.AutoSize = true;
lblFlags.Location = new Point(110, 65);
lblFlags.Location = new Point(88, 52);
lblFlags.Margin = new Padding(2, 0, 2, 0);
lblFlags.Name = "lblFlags";
lblFlags.Size = new Size(53, 25);
lblFlags.Size = new Size(43, 20);
lblFlags.TabIndex = 7;
lblFlags.Text = "Flags";
//
// lblTStates
//
lblTStates.AutoSize = true;
lblTStates.Location = new Point(110, 9);
lblTStates.Location = new Point(88, 7);
lblTStates.Margin = new Padding(2, 0, 2, 0);
lblTStates.Name = "lblTStates";
lblTStates.Size = new Size(75, 25);
lblTStates.Size = new Size(63, 20);
lblTStates.TabIndex = 8;
lblTStates.Text = "T-States";
//
// txtMemoryStart
//
txtMemoryStart.Location = new Point(375, 26);
txtMemoryStart.Location = new Point(300, 21);
txtMemoryStart.Margin = new Padding(2);
txtMemoryStart.Name = "txtMemoryStart";
txtMemoryStart.Size = new Size(150, 31);
txtMemoryStart.Size = new Size(121, 27);
txtMemoryStart.TabIndex = 9;
txtMemoryStart.Text = "Memory Start";
txtMemoryStart.TextAlign = HorizontalAlignment.Center;
@@ -149,10 +151,10 @@
//
// btnStep
//
btnStep.Location = new Point(8, 522);
btnStep.Location = new Point(6, 418);
btnStep.Margin = new Padding(2);
btnStep.Name = "btnStep";
btnStep.Size = new Size(112, 34);
btnStep.Size = new Size(90, 27);
btnStep.TabIndex = 12;
btnStep.Text = "Step";
btnStep.UseVisualStyleBackColor = true;
@@ -160,21 +162,20 @@
//
// btnRun
//
btnRun.Location = new Point(149, 522);
btnRun.Location = new Point(119, 418);
btnRun.Margin = new Padding(2);
btnRun.Name = "btnRun";
btnRun.Size = new Size(112, 34);
btnRun.Size = new Size(90, 27);
btnRun.TabIndex = 13;
btnRun.Text = "Run";
btnRun.UseVisualStyleBackColor = true;
btnRun.Click += btnRun_Click;
//
// btnRefreshMemory
//
btnRefreshMemory.Location = new Point(531, 26);
btnRefreshMemory.Location = new Point(425, 21);
btnRefreshMemory.Margin = new Padding(2);
btnRefreshMemory.Name = "btnRefreshMemory";
btnRefreshMemory.Size = new Size(112, 34);
btnRefreshMemory.Size = new Size(90, 27);
btnRefreshMemory.TabIndex = 14;
btnRefreshMemory.Text = "Refresh Memory";
btnRefreshMemory.UseVisualStyleBackColor = true;
@@ -182,137 +183,134 @@
//
// txtMemoryView
//
txtMemoryView.Location = new Point(110, 100);
txtMemoryView.Location = new Point(88, 80);
txtMemoryView.Margin = new Padding(2);
txtMemoryView.Name = "txtMemoryView";
txtMemoryView.Size = new Size(519, 243);
txtMemoryView.Size = new Size(416, 195);
txtMemoryView.TabIndex = 15;
txtMemoryView.Text = "Memory View Window";
//
// lstDisassembly
//
lstDisassembly.FormattingEnabled = true;
lstDisassembly.ItemHeight = 25;
lstDisassembly.Location = new Point(654, 14);
lstDisassembly.Location = new Point(523, 11);
lstDisassembly.Margin = new Padding(2);
lstDisassembly.Name = "lstDisassembly";
lstDisassembly.Size = new Size(314, 329);
lstDisassembly.Size = new Size(252, 264);
lstDisassembly.TabIndex = 16;
//
// lstStack
//
lstStack.FormattingEnabled = true;
lstStack.ItemHeight = 25;
lstStack.Location = new Point(974, 14);
lstStack.Location = new Point(779, 11);
lstStack.Margin = new Padding(2);
lstStack.Name = "lstStack";
lstStack.Size = new Size(162, 329);
lstStack.Size = new Size(130, 264);
lstStack.TabIndex = 17;
//
// btnExit
//
btnExit.Location = new Point(1019, 520);
btnExit.Location = new Point(815, 416);
btnExit.Margin = new Padding(2);
btnExit.Name = "btnExit";
btnExit.Size = new Size(112, 34);
btnExit.Size = new Size(90, 27);
btnExit.TabIndex = 18;
btnExit.Text = "Full Exit";
btnExit.UseVisualStyleBackColor = true;
btnExit.Click += btnExit_Click;
//
// label1
//
label1.AutoSize = true;
label1.Location = new Point(250, 348);
label1.Margin = new Padding(4, 0, 4, 0);
label1.Location = new Point(289, 284);
label1.Name = "label1";
label1.Size = new Size(97, 25);
label1.Size = new Size(81, 20);
label1.TabIndex = 19;
label1.Text = "Breakpoint";
//
// txtBreakpoint
//
txtBreakpoint.Location = new Point(470, 351);
txtBreakpoint.Margin = new Padding(4);
txtBreakpoint.Location = new Point(376, 281);
txtBreakpoint.Name = "txtBreakpoint";
txtBreakpoint.Size = new Size(155, 31);
txtBreakpoint.Size = new Size(125, 27);
txtBreakpoint.TabIndex = 20;
//
// label2
//
label2.AutoSize = true;
label2.Location = new Point(291, 26);
label2.Margin = new Padding(4, 0, 4, 0);
label2.Location = new Point(233, 21);
label2.Name = "label2";
label2.Size = new Size(77, 25);
label2.Size = new Size(62, 20);
label2.TabIndex = 21;
label2.Text = "Address";
//
// lblIX
//
lblIX.AutoSize = true;
lblIX.Location = new Point(11, 372);
lblIX.Location = new Point(9, 298);
lblIX.Margin = new Padding(2, 0, 2, 0);
lblIX.Name = "lblIX";
lblIX.Size = new Size(28, 25);
lblIX.Size = new Size(22, 20);
lblIX.TabIndex = 22;
lblIX.Text = "IX";
//
// lblIY
//
lblIY.AutoSize = true;
lblIY.Location = new Point(12, 430);
lblIY.Location = new Point(10, 344);
lblIY.Margin = new Padding(2, 0, 2, 0);
lblIY.Name = "lblIY";
lblIY.Size = new Size(27, 25);
lblIY.Size = new Size(21, 20);
lblIY.TabIndex = 23;
lblIY.Text = "IY";
//
// lblIff1
//
lblIff1.AutoSize = true;
lblIff1.Location = new Point(110, 372);
lblIff1.Margin = new Padding(4, 0, 4, 0);
lblIff1.Location = new Point(88, 298);
lblIff1.Name = "lblIff1";
lblIff1.Size = new Size(45, 25);
lblIff1.Size = new Size(35, 20);
lblIff1.TabIndex = 24;
lblIff1.Text = "IFF1";
//
// lblIff2
//
lblIff2.AutoSize = true;
lblIff2.Location = new Point(110, 431);
lblIff2.Margin = new Padding(4, 0, 4, 0);
lblIff2.Location = new Point(88, 345);
lblIff2.Name = "lblIff2";
lblIff2.Size = new Size(45, 25);
lblIff2.Size = new Size(35, 20);
lblIff2.TabIndex = 25;
lblIff2.Text = "IFF2";
//
// lblIE
//
lblIE.AutoSize = true;
lblIE.Location = new Point(250, 431);
lblIE.Margin = new Padding(4, 0, 4, 0);
lblIE.Location = new Point(200, 345);
lblIE.Name = "lblIE";
lblIE.Size = new Size(133, 25);
lblIE.Size = new Size(109, 20);
lblIE.TabIndex = 26;
lblIE.Text = "Interrupt Mode";
//
// btnReset
//
btnReset.Location = new Point(883, 520);
btnReset.Location = new Point(372, 313);
btnReset.Margin = new Padding(2);
btnReset.Name = "btnReset";
btnReset.Size = new Size(112, 34);
btnReset.Size = new Size(132, 27);
btnReset.TabIndex = 27;
btnReset.Text = "Hard Reset";
btnReset.Text = "Set Breakpoint";
btnReset.UseVisualStyleBackColor = true;
btnReset.Click += btnReset_Click;
btnReset.Click += btnSetBreakpoint_Click;
//
// uiUpdateTimer
//
uiUpdateTimer.Enabled = true;
uiUpdateTimer.Tick += uiUpdateTimer_Tick;
//
// DebuggerForm
//
AutoScaleDimensions = new SizeF(10F, 25F);
AutoScaleDimensions = new SizeF(8F, 20F);
AutoScaleMode = AutoScaleMode.Font;
ClientSize = new Size(1160, 568);
ClientSize = new Size(928, 454);
Controls.Add(btnReset);
Controls.Add(lblIE);
Controls.Add(lblIff2);
@@ -373,6 +371,7 @@
private Label lblIff2;
private Label lblIE;
private Button btnReset;
private System.Windows.Forms.Timer uiUpdateTimer;
//private TextBox textBox4;
}
}

161
Desktop/DebuggerForm.cs
View File

@@ -40,9 +40,17 @@ namespace Desktop
{
MessageBox.Show(ex.Message, "CPU Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
}
private void btnSetBreakpoint_Click(object sender, EventArgs e) // Hook this to a button or text changed event
{
if (ushort.TryParse(txtBreakpoint.Text, System.Globalization.NumberStyles.HexNumber, null, out ushort parsedBp))
{
UpdateDisplay();
_mainForm.Breakpoint = parsedBp;
}
else
{
_mainForm.Breakpoint = null;
}
}
@@ -51,156 +59,13 @@ namespace Desktop
UpdateDisplay();
}
private async void btnRun_Click(object sender, EventArgs e)
private void uiUpdateTimer_Tick(object sender, EventArgs e)
{
//Stops
if (_isRunning)
{
_isRunning = false;
btnRun.Text = "Run";
return;
}
//Parse the Breakpoint
if (!string.IsNullOrWhiteSpace(txtBreakpoint.Text))
{
if (ushort.TryParse(txtBreakpoint.Text, System.Globalization.NumberStyles.HexNumber, null, out ushort parsedBp))
{
_breakpoint = parsedBp;
}
else
{
MessageBox.Show("Invalid hex address in breakpoint!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
}
else
{
_breakpoint = null;
}
// Start the run state
_isRunning = true;
btnRun.Text = "Stop";
//Background thread
await Task.Run(() =>
{
try
{
// 1. Setup Frame Timing Variables
const int TStatesPerFrame = 69888;
long nextFrameTargetTStates = _cpu.TotalTStates + TStatesPerFrame;
// 2. Setup Real-World Throttling
var stopwatch = System.Diagnostics.Stopwatch.StartNew();
long frameCount = 0;
while (_isRunning)
{
// --- Breakpoint Check ---
if (_breakpoint.HasValue && _cpu.PC == _breakpoint.Value)
{
_isRunning = false;
break;
}
// --- Execute Instruction ---
_cpu.Step();
//if (_cpu.TotalTStates % 1000 == 0)
//{
// this.Invoke((MethodInvoker)delegate
// {
// UpdateDisplay();
// });
//}
// --- Check for End of Frame ---
if (_cpu.TotalTStates >= nextFrameTargetTStates)
{
// 1. Fire the 50Hz Interrupt!
_cpu.RequestInterrupt();
// 2. Advance the target to the next frame
nextFrameTargetTStates += TStatesPerFrame;
frameCount++;
//3 Render the screen
_mainForm.Invoke((MethodInvoker)delegate
{
_mainForm.RenderScreen();
});
// 4. Throttle to real-time (50 frames per second = 20ms per frame)
long targetTimeMs = frameCount * 20;
long elapsedMs = stopwatch.ElapsedMilliseconds;
if (elapsedMs < targetTimeMs)
{
// The CPU ran too fast! Put the thread to sleep to let reality catch up.
System.Threading.Thread.Sleep((int)(targetTimeMs - elapsedMs));
}
// Optional: Update the UI every 10 frames so you can watch it run safely
// without overwhelming the WinForms rendering engine.
if (frameCount % 1 == 0)
{
this.Invoke((MethodInvoker)delegate
{
UpdateDisplay();
});
}
}
//this.Invoke((MethodInvoker)delegate {
// UpdateDisplay();
// });
}
}
catch (Exception ex)
{
_isRunning = false;
this.Invoke((MethodInvoker)delegate
{
MessageBox.Show(ex.Message, "CPU Break", MessageBoxButtons.OK, MessageBoxIcon.Information);
});
}
});
//update the UI when the background thread finishes
btnRun.Text = "Run";
// Every 100ms, take a snapshot of the CPU state and draw it to the screen.
// This makes the registers look like they are spinning matrix-style while running!
UpdateDisplay();
}
private void btnReset_Click(object sender, EventArgs e)
{
// 1. Safely stop the emulator if it is currently in a Run loop
if (_isRunning)
{
_isRunning = false;
btnRun.Text = "Run";
}
// 2. Power cycle the CPU
_cpu.Reset();
// Note: A true hard reset also wipes the RAM.
// If you add a RAM clear method to your MemoryBus later, call it here!
_memoryBus.ClearRam(); //To Do
// 3. Clear the UI tracking lists
lstDisassembly.Items.Clear();
lstStack.Items.Clear();
// 4. Force a full UI refresh to show the clean slate
UpdateDisplay();
}
private void btnExit_Click(object sender, EventArgs e)
{
Environment.Exit(0);
}
// This is the master function that pulls state from the CPU
private void UpdateDisplay()
{

3
Desktop/DebuggerForm.resx
View File

@@ -120,4 +120,7 @@
<metadata name="saveFileDialog1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
<value>17, 17</value>
</metadata>
<metadata name="uiUpdateTimer.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
<value>182, 17</value>
</metadata>
</root>

120
Desktop/Form1.Designer.cs generated
View File

@@ -32,7 +32,16 @@
menuStrip1 = new MenuStrip();
fileToolStripMenuItem = new ToolStripMenuItem();
openToolStripMenuItem = new ToolStripMenuItem();
openSnapshotToolStripMenuItem = new ToolStripMenuItem();
tAPToolStripMenuItem = new ToolStripMenuItem();
sNAToolStripMenuItem = new ToolStripMenuItem();
exitToolStripMenuItem = new ToolStripMenuItem();
viewToolStripMenuItem = new ToolStripMenuItem();
debuggerToolStripMenuItem = new ToolStripMenuItem();
machineToolStripMenuItem = new ToolStripMenuItem();
runToolStripMenuItem = new ToolStripMenuItem();
resetToolStripMenuItem = new ToolStripMenuItem();
stepToolStripMenuItem = new ToolStripMenuItem();
resetToolStripMenuItem1 = new ToolStripMenuItem();
((System.ComponentModel.ISupportInitialize)picScreen).BeginInit();
menuStrip1.SuspendLayout();
SuspendLayout();
@@ -40,10 +49,9 @@
// picScreen
//
picScreen.BackColor = Color.Black;
picScreen.Location = new Point(13, 33);
picScreen.Margin = new Padding(4);
picScreen.Location = new Point(10, 26);
picScreen.Name = "picScreen";
picScreen.Size = new Size(900, 720);
picScreen.Size = new Size(720, 576);
picScreen.SizeMode = PictureBoxSizeMode.Zoom;
picScreen.TabIndex = 0;
picScreen.TabStop = false;
@@ -51,44 +59,107 @@
// menuStrip1
//
menuStrip1.ImageScalingSize = new Size(24, 24);
menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem });
menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem, viewToolStripMenuItem, machineToolStripMenuItem });
menuStrip1.Location = new Point(0, 0);
menuStrip1.Name = "menuStrip1";
menuStrip1.Size = new Size(922, 33);
menuStrip1.Padding = new Padding(5, 2, 0, 2);
menuStrip1.Size = new Size(738, 28);
menuStrip1.TabIndex = 1;
menuStrip1.Text = "menuStrip1";
//
// fileToolStripMenuItem
//
fileToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { openToolStripMenuItem, openSnapshotToolStripMenuItem });
fileToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { openToolStripMenuItem, exitToolStripMenuItem });
fileToolStripMenuItem.Name = "fileToolStripMenuItem";
fileToolStripMenuItem.Size = new Size(54, 29);
fileToolStripMenuItem.Size = new Size(46, 24);
fileToolStripMenuItem.Text = "File";
//
// openToolStripMenuItem
//
openToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { tAPToolStripMenuItem, sNAToolStripMenuItem });
openToolStripMenuItem.Name = "openToolStripMenuItem";
openToolStripMenuItem.Size = new Size(270, 34);
openToolStripMenuItem.Text = "Open TAP";
openToolStripMenuItem.Click += loadTAPToolStripMenuItem_Click;
openToolStripMenuItem.Size = new Size(128, 26);
openToolStripMenuItem.Text = "Open";
//
// openSnapshotToolStripMenuItem
// tAPToolStripMenuItem
//
openSnapshotToolStripMenuItem.Name = "openSnapshotToolStripMenuItem";
openSnapshotToolStripMenuItem.Size = new Size(270, 34);
openSnapshotToolStripMenuItem.Text = "Open Snapshot";
openSnapshotToolStripMenuItem.Click += openSNAToolStripMenuItem_Click;
tAPToolStripMenuItem.Name = "tAPToolStripMenuItem";
tAPToolStripMenuItem.Size = new Size(121, 26);
tAPToolStripMenuItem.Text = "TAP";
tAPToolStripMenuItem.Click += loadTAPToolStripMenuItem_Click;
//
// sNAToolStripMenuItem
//
sNAToolStripMenuItem.Name = "sNAToolStripMenuItem";
sNAToolStripMenuItem.Size = new Size(121, 26);
sNAToolStripMenuItem.Text = "SNA";
sNAToolStripMenuItem.Click += openSNAToolStripMenuItem_Click;
//
// exitToolStripMenuItem
//
exitToolStripMenuItem.Name = "exitToolStripMenuItem";
exitToolStripMenuItem.Size = new Size(128, 26);
exitToolStripMenuItem.Text = "Exit";
exitToolStripMenuItem.Click += btnExit_Click;
//
// viewToolStripMenuItem
//
viewToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { debuggerToolStripMenuItem });
viewToolStripMenuItem.Name = "viewToolStripMenuItem";
viewToolStripMenuItem.Size = new Size(55, 24);
viewToolStripMenuItem.Text = "View";
//
// debuggerToolStripMenuItem
//
debuggerToolStripMenuItem.Name = "debuggerToolStripMenuItem";
debuggerToolStripMenuItem.Size = new Size(224, 26);
debuggerToolStripMenuItem.Text = "Debugger";
debuggerToolStripMenuItem.Click += openDebuggerToolStripMenuItem_Click;
//
// machineToolStripMenuItem
//
machineToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { runToolStripMenuItem, resetToolStripMenuItem, stepToolStripMenuItem, resetToolStripMenuItem1 });
machineToolStripMenuItem.Name = "machineToolStripMenuItem";
machineToolStripMenuItem.Size = new Size(79, 24);
machineToolStripMenuItem.Text = "Machine";
//
// runToolStripMenuItem
//
runToolStripMenuItem.Name = "runToolStripMenuItem";
runToolStripMenuItem.Size = new Size(129, 26);
runToolStripMenuItem.Text = "Run";
runToolStripMenuItem.Click += btnRun_Click;
//
// resetToolStripMenuItem
//
resetToolStripMenuItem.Name = "resetToolStripMenuItem";
resetToolStripMenuItem.Size = new Size(129, 26);
resetToolStripMenuItem.Text = "Pause";
resetToolStripMenuItem.Click += btnPause_Click;
//
// stepToolStripMenuItem
//
stepToolStripMenuItem.Name = "stepToolStripMenuItem";
stepToolStripMenuItem.Size = new Size(129, 26);
stepToolStripMenuItem.Text = "Step";
stepToolStripMenuItem.Click += btnStep_Click;
//
// resetToolStripMenuItem1
//
resetToolStripMenuItem1.Name = "resetToolStripMenuItem1";
resetToolStripMenuItem1.Size = new Size(129, 26);
resetToolStripMenuItem1.Text = "Reset";
resetToolStripMenuItem1.Click += btnReset_Click;
//
// Form1
//
AutoScaleDimensions = new SizeF(10F, 25F);
AutoScaleDimensions = new SizeF(8F, 20F);
AutoScaleMode = AutoScaleMode.Font;
ClientSize = new Size(922, 760);
ClientSize = new Size(738, 608);
Controls.Add(picScreen);
Controls.Add(menuStrip1);
KeyPreview = true;
MainMenuStrip = menuStrip1;
Margin = new Padding(4);
Name = "Form1";
Text = "Parsons Sinclair ZX Spectrum 48K - 2026";
((System.ComponentModel.ISupportInitialize)picScreen).EndInit();
@@ -104,6 +175,15 @@
private MenuStrip menuStrip1;
private ToolStripMenuItem fileToolStripMenuItem;
private ToolStripMenuItem openToolStripMenuItem;
private ToolStripMenuItem openSnapshotToolStripMenuItem;
private ToolStripMenuItem tAPToolStripMenuItem;
private ToolStripMenuItem sNAToolStripMenuItem;
private ToolStripMenuItem exitToolStripMenuItem;
private ToolStripMenuItem viewToolStripMenuItem;
private ToolStripMenuItem debuggerToolStripMenuItem;
private ToolStripMenuItem machineToolStripMenuItem;
private ToolStripMenuItem runToolStripMenuItem;
private ToolStripMenuItem resetToolStripMenuItem;
private ToolStripMenuItem stepToolStripMenuItem;
private ToolStripMenuItem resetToolStripMenuItem1;
}
}

119
Desktop/Form1.cs
View File

@@ -16,6 +16,11 @@ namespace Desktop
private IO_Bus _simpleIoBus = null!;
private TapManager _tapManager = null!;
private int _ulaFrameCount = 0;
private bool _isRunning = false;
private bool _isPaused = false;
private bool _resetFlag = false;
public ushort? Breakpoint = null; // Public so the debugger can set it!
private DebuggerForm _debugger = null;
// The 16 physical colors of the ZX Spectrum (ARGB format)
private readonly int[] SpectrumColors = new int[]
@@ -61,16 +66,88 @@ namespace Desktop
_cpu = new Z80(_memoryBus, _simpleIoBus, _tapManager);
// Pass 'this' so the DebuggerForm can talk back to this main window
DebuggerForm debugger = new DebuggerForm(_cpu, _memoryBus, this);
debugger.Show();
//DebuggerForm debugger = new DebuggerForm(_cpu, _memoryBus, this);
//debugger.Show();
}
catch (Exception ex)
{
MessageBox.Show($"Failed to initialize emulator:\n{ex.Message}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
StartEmulationLoop();
}
private void StartEmulationLoop()
{
if (_isRunning) return;
_isRunning = true;
_isPaused = false;
Task.Run(() =>
{
try
{
const int TStatesPerFrame = 69888;
long nextFrameTargetTStates = _cpu.TotalTStates + TStatesPerFrame;
var stopwatch = System.Diagnostics.Stopwatch.StartNew();
long frameCount = 0;
while (_isRunning)
{
//if(_resetFlag)
//{
// _resetFlag = false;
// stopwatch.Reset();
// nextFrameTargetTStates = _cpu.TotalTStates + TStatesPerFrame;
// frameCount = 0;
//}
if (_isPaused)
{
System.Threading.Thread.Sleep(10); // Don't melt the host CPU while paused
continue;
}
// --- Breakpoint Check ---
if (Breakpoint.HasValue && _cpu.PC == Breakpoint.Value)
{
_isPaused = true;
// Optional: You could force the debugger to open here!
continue;
}
// --- Execute Instruction ---
_cpu.Step();
// --- Check for End of Frame ---
if (_cpu.TotalTStates >= nextFrameTargetTStates)
{
_cpu.RequestInterrupt();
nextFrameTargetTStates += TStatesPerFrame;
frameCount++;
// Render the screen
this.Invoke((MethodInvoker)delegate { RenderScreen(); });
// Throttle to real-time (50 FPS = 20ms)
long targetTimeMs = frameCount * 20;
long elapsedMs = stopwatch.ElapsedMilliseconds;
if (elapsedMs < targetTimeMs)
{
System.Threading.Thread.Sleep((int)(targetTimeMs - elapsedMs));
}
}
}
}
catch (Exception ex)
{
_isPaused = true;
this.Invoke((MethodInvoker)delegate {
MessageBox.Show(ex.Message, "CPU Crash", MessageBoxButtons.OK, MessageBoxIcon.Error);
});
}
});
}
// Inside Desktop/Form1.cs
private void loadTAPToolStripMenuItem_Click(object sender, EventArgs e)
{
using (OpenFileDialog ofd = new OpenFileDialog())
@@ -101,6 +178,42 @@ namespace Desktop
}
}
private void btnRun_Click(object sender, EventArgs e) => _isPaused = false;
private void btnPause_Click(object sender, EventArgs e) => _isPaused = true;
private void btnStep_Click(object sender, EventArgs e)
{
if (_isPaused) _cpu.Step();
}
private void btnReset_Click(object sender, EventArgs e)
{
//_resetFlag = true;
_isPaused = true;
_cpu.Reset();
_memoryBus.CleanRAMData();
_isPaused = false;
}
private void btnExit_Click(object sender, EventArgs e)
{
Environment.Exit(0);
}
private void openDebuggerToolStripMenuItem_Click(object sender, EventArgs e)
{
if (_debugger == null || _debugger.IsDisposed)
{
_debugger = new DebuggerForm(_cpu, _memoryBus, this);
_debugger.Show();
}
else
{
_debugger.BringToFront();
}
}
// Public so the Debugger's background thread can call it 50 times a second
public void RenderScreen()
{