Added window scaling

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);
             }
         }