diff --git a/Core/Cpu/Z80.cs b/Core/Cpu/Z80.cs
index 3f10abc..36e1489 100644
--- a/Core/Cpu/Z80.cs
+++ b/Core/Cpu/Z80.cs
@@ -1303,6 +1303,35 @@ namespace Core.Cpu
switch (extendedOpcode)
{
+ case 0x40: // IN B, (C)
+ {
+ byte inVal40 = ReadPort(BC.Word);
+ BC.High = inVal40;
+
+ byte flags40 = (byte)(AF.Low & 0x01); // Preserve Carry
+ if ((inVal40 & 0x80) != 0) flags40 |= 0x80; // S
+ if (inVal40 == 0) flags40 |= 0x40; // Z
+ flags40 |= ParityTable[inVal40]; // P/V
+ flags40 |= (byte)(inVal40 & 0x28); // Undocumented bits 3 and 5
+
+ AF.Low = flags40;
+ return 12;
+ }
+
+ case 0x50: // IN D, (C)
+ {
+ byte inVal50 = ReadPort(BC.Word);
+ DE.High = inVal50;
+
+ byte flags50 = (byte)(AF.Low & 0x01); // Preserve Carry
+ if ((inVal50 & 0x80) != 0) flags50 |= 0x80; // S
+ if (inVal50 == 0) flags50 |= 0x40; // Z
+ flags50 |= ParityTable[inVal50]; // P/V
+ flags50 |= (byte)(inVal50 & 0x28); // Undocumented bits 3 and 5
+
+ AF.Low = flags50;
+ return 12;
+ }
case 0x41: // OUT (C), B
_simpleIoBus.WritePort(BC.Word, BC.High);
return 12;
diff --git a/Desktop/Desktop.csproj b/Desktop/Desktop.csproj
index e5cba67..827aa73 100644
--- a/Desktop/Desktop.csproj
+++ b/Desktop/Desktop.csproj
@@ -15,6 +15,14 @@
win-x64
Desktop.Program
Parsons Master System
+ favicon.ico
+ Sega Master System EMulator 2026
+ 0.9
+ Marc Parsons
+ Parsons Limited
+ Parsons Master System 2026
+ Copyright 2026 Marc Parsons
+ logo1.bmp
@@ -103,6 +111,10 @@
+
+
+
+
Never
@@ -353,6 +365,13 @@
+
+
+ True
+ \
+
+
+
diff --git a/Desktop/Form1.cs b/Desktop/Form1.cs
index 198dbcc..7a2aae1 100644
--- a/Desktop/Form1.cs
+++ b/Desktop/Form1.cs
@@ -53,7 +53,7 @@ namespace Desktop
this.Text = $"Parsons Master System - {_currentRomName}";
- // Safe to initialize hardware and files here!
+ this.BackColor = Color.Black;
_machine = new SmsMachine();
_audioPlayer = new NAudioPlayer();
_machine.AudioProcessor.AudioDevice = _audioPlayer;
@@ -72,27 +72,37 @@ namespace Desktop
}
protected override void OnPaint(PaintEventArgs e)
{
- // Always call the base method so Windows can draw your MenuStrip!
base.OnPaint(e);
- // THE FIX: We MUST ensure the designer has actually built the menu strip before asking for its height!
if (_screenBitmap != null && menuStrip1 != null)
{
- // 1. Set the rendering mode for perfect, chunky retro pixels!
+ // 1. Maintain perfect, chunky retro pixels
e.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
e.Graphics.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.Half;
- // 2. Calculate the drawing area.
- // We start drawing BELOW the MenuStrip so it doesn't get covered up.
+ // 2. Calculate the actual usable window space
int topOffset = menuStrip1.Height;
- Rectangle renderArea = new Rectangle(
- 0,
- topOffset,
- this.ClientSize.Width,
- this.ClientSize.Height - topOffset
- );
+ int availableWidth = this.ClientSize.Width;
+ int availableHeight = this.ClientSize.Height - topOffset;
- // 3. Blast the bitmap directly onto the graphics card buffer!
+ // 3. Calculate the maximum scale factor that fits perfectly
+ float scaleX = (float)availableWidth / 256f;
+ float scaleY = (float)availableHeight / 192f;
+
+ // Pick the smaller scale so the image never bleeds off the edge
+ float scale = Math.Min(scaleX, scaleY);
+
+ // 4. Calculate the new physical pixel dimensions
+ int newWidth = (int)(256 * scale);
+ int newHeight = (int)(192 * scale);
+
+ // 5. Center the image (Letterboxing / Pillarboxing)
+ int offsetX = (availableWidth - newWidth) / 2;
+ int offsetY = topOffset + ((availableHeight - newHeight) / 2);
+
+ Rectangle renderArea = new Rectangle(offsetX, offsetY, newWidth, newHeight);
+
+ // 6. Draw the scaled image
e.Graphics.DrawImage(_screenBitmap, renderArea);
}
}
diff --git a/Desktop/favicon.ico b/Desktop/favicon.ico
new file mode 100644
index 0000000..97d0b86
Binary files /dev/null and b/Desktop/favicon.ico differ
diff --git a/favicon.ico b/favicon.ico
new file mode 100644
index 0000000..97d0b86
Binary files /dev/null and b/favicon.ico differ
diff --git a/logo1.bmp b/logo1.bmp
new file mode 100644
index 0000000..ee3dca7
Binary files /dev/null and b/logo1.bmp differ