More OpCodes - working towards ZEXALL perfection

Desktop/Form1.cs

@@ -26,6 +26,7 @@ namespace Desktop
         public double FramesPerSecond = 0;
         public double TotalFrameTime = 0;
         public double FrameTime = 0;
+        public bool exceptionRaised = false;
         
 
         public Form1()
@@ -40,10 +41,10 @@ namespace Desktop
             {
                 _baseTitle = this.Text;
                 _memoryBus = new MemoryBus();
-                _simpleIoBus = new IO_Bus();
+                _tapManager = new TapManager();
+                _simpleIoBus = new IO_Bus(_tapManager);
                 _ula = new ULA(_memoryBus, _simpleIoBus);
                 _beeper = new BeeperDevice();
-                _tapManager = new TapManager();
                 _memoryBus.CrapRAMData();
                 byte[] romData = RomLoader.Load("48.rom");
                 _memoryBus.LoadRom(romData);
@@ -92,13 +93,19 @@ namespace Desktop
                             continue;
                         }
 
+                        long tStatesBefore = _cpu.TotalTStates;
+
                         // --- Execute Instruction ---
                         _cpu.Step();
 
+                        int elapsedTStates = (int)(_cpu.TotalTStates - tStatesBefore);
+                        _tapManager.Update(elapsedTStates);
+
                         //Process audio at the correct time
                         while (_cpu.TotalTStates >= (long)(audioSampleCount * 79.365))
                         {
-                            _beeper.AddSample(_simpleIoBus.BeeperState);
+                            bool finalAudioOutput = _simpleIoBus.BeeperState ^ _tapManager.EarBit;
+                            _beeper.AddSample(finalAudioOutput);
                             audioSampleCount++;
                         }
 
@@ -119,7 +126,7 @@ namespace Desktop
                                 this.Invoke((MethodInvoker)delegate 
                                 { 
                                     UpdateScreenBitmap();
-                                    this.Text = $"{_baseTitle} - FPS: {FramesPerSecond:F1}";
+                                    this.Text = $"{_baseTitle} - FPS: {FramesPerSecond:F1} - Fast Loading: {_cpu.EnableFastLoad.ToString()}";
                                 });
                                 TotalFrameCount++;
 
@@ -129,7 +136,7 @@ namespace Desktop
 
                                 if (elapsedMs < targetTimeMs)
                                 {
-                                    Thread.Sleep((int)(targetTimeMs - elapsedMs));
+                                    //Thread.Sleep((int)(targetTimeMs - elapsedMs));
                                 }
                                 TotalFrameTime += fpsStopwatch.Elapsed.TotalMilliseconds;
                                 if (TotalFrameCount % 50 == 0)
@@ -150,6 +157,7 @@ namespace Desktop
                     this.Invoke((MethodInvoker)delegate
                     {
                         MessageBox.Show(ex.Message, "CPU Crash", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                        
                     });
                 }
             });
@@ -188,6 +196,15 @@ namespace Desktop
             }
             _isPaused = false;
         }
+
+        private void fastLoadingToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            // Toggle the checkmark UI
+            fastLoadingToolStripMenuItem.Checked = !fastLoadingToolStripMenuItem.Checked;
+
+            // Tell the CPU to enable or disable the ROM hijack
+            _cpu.EnableFastLoad = fastLoadingToolStripMenuItem.Checked;
+        }
         private void openSNAToolStripMenuItem_Click(object sender, EventArgs e)
         {
             _isPaused = true;
@@ -203,6 +220,39 @@ namespace Desktop
             _isPaused = false;
         }
 
+        private void btnRunZexDoc_Click(object sender, EventArgs e)
+        {
+            _isPaused = true;
+
+            using (OpenFileDialog ofd = new OpenFileDialog())
+            {
+                ofd.Filter = "CP/M Binaries (*.com, *.bin)|*.com;*.bin";
+                if (ofd.ShowDialog() == DialogResult.OK)
+                {
+                    byte[] zexdocBytes = System.IO.File.ReadAllBytes(ofd.FileName);
+
+                    // 1. Wipe the RAM completely clean
+                    _memoryBus.CleanRAMData();
+
+                    // 2. Load ZEXDOC exactly at CP/M start address 0x0100
+                    for (int i = 0; i < zexdocBytes.Length; i++)
+                    {
+                        _memoryBus.Write((ushort)(0x0100 + i), zexdocBytes[i]);
+                    }
+
+                    // 3. Configure the CPU for CP/M
+                    _cpu.IsZexDocMode = true;
+                    _cpu.PC = 0x0100;    // Execution starts here
+                    _cpu.SP = 0xFFFF;    // Put the stack at the very top of memory
+
+                    // 4. Fake a RET address at 0x0000 so the test terminates gracefully when finished
+                    _memoryBus.Write(0x0000, 0xD3); // OUT (n), A (A fake halt sequence)
+
+                    // Unpause and watch the Visual Studio Output window!
+                    _isPaused = false;
+                }
+            }
+        }
         private void btnRun_Click(object sender, EventArgs e) => _isPaused = false;
 
         private void btnPause_Click(object sender, EventArgs e) => _isPaused = true;