NESPPU - at a refresh rate slider. I was hoping to not resort to such a hack but it REALLY helps, and most case uses don't need full refresh accuracy, and on those occasions, it is a simple use of the slider.

BizHawk.MultiClient/Config.cs

@@ -244,6 +244,7 @@
 		public bool NESPPUSaveWindowPosition = true;
 		public int NESPPUWndx = -1;
 		public int NESPPUWndy = -1;
+		public int NESPPURefreshRate = 4;
 
 		// NESDebuger Settings
 		public bool AutoLoadNESDebugger = false;

BizHawk.MultiClient/NEStools/NESPPU.Designer.cs

@@ -34,6 +34,12 @@
 			this.Table0PaletteLabel = new System.Windows.Forms.Label();
 			this.PalettesGroup = new System.Windows.Forms.GroupBox();
 			this.DetailsBox = new System.Windows.Forms.GroupBox();
+			this.label2 = new System.Windows.Forms.Label();
+			this.Value5Label = new System.Windows.Forms.Label();
+			this.Value4Label = new System.Windows.Forms.Label();
+			this.label1 = new System.Windows.Forms.Label();
+			this.ZoomBox = new System.Windows.Forms.PictureBox();
+			this.Value3Label = new System.Windows.Forms.Label();
 			this.Value2Label = new System.Windows.Forms.Label();
 			this.ValueLabel = new System.Windows.Forms.Label();
 			this.AddressLabel = new System.Windows.Forms.Label();
@@ -63,22 +69,22 @@
 			this.SpriteViewerBox = new System.Windows.Forms.GroupBox();
 			this.txtScanline = new System.Windows.Forms.TextBox();
 			this.groupBox1 = new System.Windows.Forms.GroupBox();
-			this.Value3Label = new System.Windows.Forms.Label();
+			this.groupBox2 = new System.Windows.Forms.GroupBox();
-			this.ZoomBox = new System.Windows.Forms.PictureBox();
+			this.RefreshRate = new System.Windows.Forms.TrackBar();
+			this.label3 = new System.Windows.Forms.Label();
+			this.label4 = new System.Windows.Forms.Label();
 			this.SpriteView = new BizHawk.MultiClient.SpriteViewer();
 			this.PaletteView = new BizHawk.MultiClient.PaletteViewer();
 			this.PatternView = new BizHawk.MultiClient.PatternViewer();
-			this.label1 = new System.Windows.Forms.Label();
-			this.Value4Label = new System.Windows.Forms.Label();
-			this.Value5Label = new System.Windows.Forms.Label();
-			this.label2 = new System.Windows.Forms.Label();
 			this.PatternGroup.SuspendLayout();
 			this.PalettesGroup.SuspendLayout();
 			this.DetailsBox.SuspendLayout();
+			((System.ComponentModel.ISupportInitialize)(this.ZoomBox)).BeginInit();
 			this.toolStrip1.SuspendLayout();
 			this.SpriteViewerBox.SuspendLayout();
 			this.groupBox1.SuspendLayout();
-			((System.ComponentModel.ISupportInitialize)(this.ZoomBox)).BeginInit();
+			this.groupBox2.SuspendLayout();
+			((System.ComponentModel.ISupportInitialize)(this.RefreshRate)).BeginInit();
 			this.SuspendLayout();
 			// 
 			// PatternGroup
@@ -139,6 +145,59 @@
 			this.DetailsBox.TabStop = false;
 			this.DetailsBox.Text = "Details";
 			// 
+			// label2
+			// 
+			this.label2.AutoSize = true;
+			this.label2.Location = new System.Drawing.Point(6, 31);
+			this.label2.Name = "label2";
+			this.label2.Size = new System.Drawing.Size(163, 13);
+			this.label2.TabIndex = 10;
+			this.label2.Text = "Right-click to remember selection";
+			// 
+			// Value5Label
+			// 
+			this.Value5Label.AutoSize = true;
+			this.Value5Label.Location = new System.Drawing.Point(176, 148);
+			this.Value5Label.Name = "Value5Label";
+			this.Value5Label.Size = new System.Drawing.Size(43, 13);
+			this.Value5Label.TabIndex = 9;
+			this.Value5Label.Text = "Value 5";
+			// 
+			// Value4Label
+			// 
+			this.Value4Label.AutoSize = true;
+			this.Value4Label.Location = new System.Drawing.Point(176, 120);
+			this.Value4Label.Name = "Value4Label";
+			this.Value4Label.Size = new System.Drawing.Size(43, 13);
+			this.Value4Label.TabIndex = 8;
+			this.Value4Label.Text = "Value 4";
+			// 
+			// label1
+			// 
+			this.label1.AutoSize = true;
+			this.label1.Location = new System.Drawing.Point(6, 16);
+			this.label1.Name = "label1";
+			this.label1.Size = new System.Drawing.Size(152, 13);
+			this.label1.TabIndex = 7;
+			this.label1.Text = "Hover over item to view details";
+			// 
+			// ZoomBox
+			// 
+			this.ZoomBox.Location = new System.Drawing.Point(196, 16);
+			this.ZoomBox.Name = "ZoomBox";
+			this.ZoomBox.Size = new System.Drawing.Size(64, 64);
+			this.ZoomBox.TabIndex = 6;
+			this.ZoomBox.TabStop = false;
+			// 
+			// Value3Label
+			// 
+			this.Value3Label.AutoSize = true;
+			this.Value3Label.Location = new System.Drawing.Point(176, 92);
+			this.Value3Label.Name = "Value3Label";
+			this.Value3Label.Size = new System.Drawing.Size(43, 13);
+			this.Value3Label.TabIndex = 5;
+			this.Value3Label.Text = "Value 3";
+			// 
 			// Value2Label
 			// 
 			this.Value2Label.AutoSize = true;
@@ -389,22 +448,48 @@
 			this.groupBox1.TabStop = false;
 			this.groupBox1.Text = "Scanline";
 			// 
-			// Value3Label
+			// groupBox2
 			// 
-			this.Value3Label.AutoSize = true;
+			this.groupBox2.Controls.Add(this.label4);
-			this.Value3Label.Location = new System.Drawing.Point(176, 92);
+			this.groupBox2.Controls.Add(this.label3);
-			this.Value3Label.Name = "Value3Label";
+			this.groupBox2.Controls.Add(this.RefreshRate);
-			this.Value3Label.Size = new System.Drawing.Size(43, 13);
+			this.groupBox2.Location = new System.Drawing.Point(93, 37);
-			this.Value3Label.TabIndex = 5;
+			this.groupBox2.Name = "groupBox2";
-			this.Value3Label.Text = "Value 3";
+			this.groupBox2.Size = new System.Drawing.Size(191, 52);
+			this.groupBox2.TabIndex = 9;
+			this.groupBox2.TabStop = false;
+			this.groupBox2.Text = "Refresh";
 			// 
-			// ZoomBox
+			// RefreshRate
 			// 
-			this.ZoomBox.Location = new System.Drawing.Point(196, 16);
+			this.RefreshRate.AutoSize = false;
-			this.ZoomBox.Name = "ZoomBox";
+			this.RefreshRate.LargeChange = 2;
-			this.ZoomBox.Size = new System.Drawing.Size(64, 64);
+			this.RefreshRate.Location = new System.Drawing.Point(39, 15);
-			this.ZoomBox.TabIndex = 6;
+			this.RefreshRate.Maximum = 8;
-			this.ZoomBox.TabStop = false;
+			this.RefreshRate.Minimum = 1;
+			this.RefreshRate.Name = "RefreshRate";
+			this.RefreshRate.Size = new System.Drawing.Size(104, 31);
+			this.RefreshRate.TabIndex = 0;
+			this.RefreshRate.TickFrequency = 8;
+			this.RefreshRate.Value = 1;
+			// 
+			// label3
+			// 
+			this.label3.AutoSize = true;
+			this.label3.Location = new System.Drawing.Point(6, 19);
+			this.label3.Name = "label3";
+			this.label3.Size = new System.Drawing.Size(31, 13);
+			this.label3.TabIndex = 10;
+			this.label3.Text = "More";
+			// 
+			// label4
+			// 
+			this.label4.AutoSize = true;
+			this.label4.Location = new System.Drawing.Point(140, 20);
+			this.label4.Name = "label4";
+			this.label4.Size = new System.Drawing.Size(29, 13);
+			this.label4.TabIndex = 11;
+			this.label4.Text = "Less";
 			// 
 			// SpriteView
 			// 
@@ -442,47 +527,12 @@
 			this.PatternView.MouseLeave += new System.EventHandler(this.PatternView_MouseLeave);
 			this.PatternView.MouseMove += new System.Windows.Forms.MouseEventHandler(this.PatternView_MouseMove);
 			// 
-			// label1
-			// 
-			this.label1.AutoSize = true;
-			this.label1.Location = new System.Drawing.Point(6, 16);
-			this.label1.Name = "label1";
-			this.label1.Size = new System.Drawing.Size(152, 13);
-			this.label1.TabIndex = 7;
-			this.label1.Text = "Hover over item to view details";
-			// 
-			// Value4Label
-			// 
-			this.Value4Label.AutoSize = true;
-			this.Value4Label.Location = new System.Drawing.Point(176, 120);
-			this.Value4Label.Name = "Value4Label";
-			this.Value4Label.Size = new System.Drawing.Size(43, 13);
-			this.Value4Label.TabIndex = 8;
-			this.Value4Label.Text = "Value 4";
-			// 
-			// Value5Label
-			// 
-			this.Value5Label.AutoSize = true;
-			this.Value5Label.Location = new System.Drawing.Point(176, 148);
-			this.Value5Label.Name = "Value5Label";
-			this.Value5Label.Size = new System.Drawing.Size(43, 13);
-			this.Value5Label.TabIndex = 9;
-			this.Value5Label.Text = "Value 5";
-			// 
-			// label2
-			// 
-			this.label2.AutoSize = true;
-			this.label2.Location = new System.Drawing.Point(6, 31);
-			this.label2.Name = "label2";
-			this.label2.Size = new System.Drawing.Size(163, 13);
-			this.label2.TabIndex = 10;
-			this.label2.Text = "Right-click to remember selection";
-			// 
 			// NESPPU
 			// 
 			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
 			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
 			this.ClientSize = new System.Drawing.Size(574, 348);
+			this.Controls.Add(this.groupBox2);
 			this.Controls.Add(this.groupBox1);
 			this.Controls.Add(this.SpriteViewerBox);
 			this.Controls.Add(this.toolStrip1);
@@ -501,12 +551,15 @@
 			this.PalettesGroup.ResumeLayout(false);
 			this.DetailsBox.ResumeLayout(false);
 			this.DetailsBox.PerformLayout();
+			((System.ComponentModel.ISupportInitialize)(this.ZoomBox)).EndInit();
 			this.toolStrip1.ResumeLayout(false);
 			this.toolStrip1.PerformLayout();
 			this.SpriteViewerBox.ResumeLayout(false);
 			this.groupBox1.ResumeLayout(false);
 			this.groupBox1.PerformLayout();
-			((System.ComponentModel.ISupportInitialize)(this.ZoomBox)).EndInit();
+			this.groupBox2.ResumeLayout(false);
+			this.groupBox2.PerformLayout();
+			((System.ComponentModel.ISupportInitialize)(this.RefreshRate)).EndInit();
 			this.ResumeLayout(false);
 			this.PerformLayout();
 
@@ -557,5 +610,9 @@
 		private System.Windows.Forms.Label Value4Label;
 		private System.Windows.Forms.Label label1;
 		private System.Windows.Forms.Label label2;
+		private System.Windows.Forms.GroupBox groupBox2;
+		private System.Windows.Forms.TrackBar RefreshRate;
+		private System.Windows.Forms.Label label4;
+		private System.Windows.Forms.Label label3;
     }
 }

BizHawk.MultiClient/NEStools/NESPPU.cs

@@ -40,6 +40,7 @@ namespace BizHawk.MultiClient
 		{
 			Global.Config.NESPPUWndx = this.Location.X;
 			Global.Config.NESPPUWndy = this.Location.Y;
+			Global.Config.NESPPURefreshRate = RefreshRate.Value;
 		}
 
 		public void Restart()
@@ -68,6 +69,7 @@ namespace BizHawk.MultiClient
 		{
 			if (!this.IsHandleCreated || this.IsDisposed) return;
 
+			
 			//Pattern Viewer
 			for (int x = 0; x < 16; x++)
 			{
@@ -79,85 +81,88 @@ namespace BizHawk.MultiClient
 			if (PaletteView.HasChanged())
 				PaletteView.Refresh();
 
-			//Pattern Viewer
-			int b0 = 0;
-			int b1 = 0;
-			byte value;
-			int cvalue;
-			int pal;
 
-			System.Drawing.Imaging.BitmapData bmpdata = PatternView.pattern.LockBits(new Rectangle(new Point(0, 0), PatternView.pattern.Size), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+			if (Global.Emulator.Frame % RefreshRate.Value == 0)
-			int* framebuf = (int*)bmpdata.Scan0.ToPointer();
-			for (int z = 0; z < 2; z++)
 			{
-				if (z == 0)
+				//Pattern Viewer
-					pal = PatternView.Pal0;
+				int b0 = 0;
-				else
+				int b1 = 0;
-					pal = PatternView.Pal1;
+				byte value;
+				int cvalue;
+				int pal;
 
-				for (int i = 0; i < 16; i++)
+				System.Drawing.Imaging.BitmapData bmpdata = PatternView.pattern.LockBits(new Rectangle(new Point(0, 0), PatternView.pattern.Size), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+				int* framebuf = (int*)bmpdata.Scan0.ToPointer();
+				for (int z = 0; z < 2; z++)
 				{
-					for (int j = 0; j < 16; j++)
+					if (z == 0)
+						pal = PatternView.Pal0;
+					else
+						pal = PatternView.Pal1;
+
+					for (int i = 0; i < 16; i++)
 					{
-						for (int x = 0; x < 8; x++)
+						for (int j = 0; j < 16; j++)
 						{
-							for (int y = 0; y < 8; y++)
+							for (int x = 0; x < 8; x++)
 							{
-								b0 = GetBit((z * 0x1000) + (i * 256) + (j * 16) + y + 0 * 8, x);
+								for (int y = 0; y < 8; y++)
-								b1 = GetBit((z * 0x1000) + (i * 256) + (j * 16) + y + 1 * 8, x);
+								{
+									b0 = GetBit((z * 0x1000) + (i * 256) + (j * 16) + y + 0 * 8, x);
+									b1 = GetBit((z * 0x1000) + (i * 256) + (j * 16) + y + 1 * 8, x);
 
-								value = (byte)(b0 + (b1 << 1));
+									value = (byte)(b0 + (b1 << 1));
 
-								cvalue = Nes.LookupColor(Nes.ppu.PALRAM[value + (pal * 4)]);
+									cvalue = Nes.LookupColor(Nes.ppu.PALRAM[value + (pal * 4)]);
 
-								Color color = Color.FromArgb(cvalue);
+									Color color = Color.FromArgb(cvalue);
 
-								int adr = (x + (j * 8)) + (y + (i * 8)) * (bmpdata.Stride / 4);
+									int adr = (x + (j * 8)) + (y + (i * 8)) * (bmpdata.Stride / 4);
-								framebuf[adr + (z * 128)] = color.ToArgb();
+									framebuf[adr + (z * 128)] = color.ToArgb();
+								}
 							}
 						}
 					}
 				}
-			}
+				PatternView.pattern.UnlockBits(bmpdata);
-			PatternView.pattern.UnlockBits(bmpdata);
+				PatternView.Refresh();
-			PatternView.Refresh();
 
+				System.Drawing.Imaging.BitmapData bmpdata2 = SpriteView.sprites.LockBits(new Rectangle(new Point(0, 0), SpriteView.sprites.Size), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+				int* framebuf2 = (int*)bmpdata2.Scan0.ToPointer();
+				int Addr, SpriteNum, TileNum, PatAddr, Attr;
 
-			System.Drawing.Imaging.BitmapData bmpdata2 = SpriteView.sprites.LockBits(new Rectangle(new Point(0, 0), SpriteView.sprites.Size), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+				//Sprite Viewer
-			int* framebuf2 = (int*)bmpdata2.Scan0.ToPointer();
+				for (int n = 0; n < 4; n++)
-			int Addr, SpriteNum, TileNum, PatAddr, Attr;
-
-			//Sprite Viewer
-			for (int n = 0; n < 4; n++)
-			{
-				for (int r = 0; r < 16; r++)
 				{
-					Addr = 0x23C1 + (n * 0x400) + (r + 4); //TODO: NEEDZ ADDRESS!
+					for (int r = 0; r < 16; r++)
-					SpriteNum = (n << 4) | r;
-					TileNum = Nes.ppu.ppubus_read(Addr, true);
-					PatAddr = (TileNum * 0x10) + (n > 1 ? 0x1000 : 0);
-					Attr = 0; //TODO
-
-					//TODO: 8x16 viewing
-					for (int x = 0; x < 8; x++)
 					{
-						for (int y = 0; y < 8; y++)
+						Addr = 0x23C1 + (n * 0x400) + (r + 4); //TODO: NEEDZ ADDRESS!
+						SpriteNum = (n << 4) | r;
+						TileNum = Nes.ppu.ppubus_read(Addr, true);
+						PatAddr = (TileNum * 0x10) + (n > 1 ? 0x1000 : 0);
+						Attr = 0; //TODO
+
+						//TODO: 8x16 viewing
+						for (int x = 0; x < 8; x++)
 						{
-							b0 = GetBit(PatAddr + y + 0 * 8, x);
+							for (int y = 0; y < 8; y++)
-							b1 = GetBit(PatAddr + y + 1 * 8, x);
+							{
-							value = (byte)(b0 + (b1 << 1));
+								b0 = GetBit(PatAddr + y + 0 * 8, x);
-							cvalue = Nes.LookupColor(Nes.ppu.PALRAM[value + (PatternView.Pal0 * 4)]);
+								b1 = GetBit(PatAddr + y + 1 * 8, x);
-							Color color = Color.FromArgb(cvalue);
+								value = (byte)(b0 + (b1 << 1));
+								cvalue = Nes.LookupColor(Nes.ppu.PALRAM[value + (PatternView.Pal0 * 4)]);
+								Color color = Color.FromArgb(cvalue);
 
-							int adr = (x + (r * 8 * 2)) + (y + (n * 8 * 3)) * (bmpdata2.Stride / 4);
+								int adr = (x + (r * 8 * 2)) + (y + (n * 8 * 3)) * (bmpdata2.Stride / 4);
-							framebuf2[adr] = color.ToArgb();
+								framebuf2[adr] = color.ToArgb();
+							}
 						}
-					}
 
+					}
 				}
+				SpriteView.sprites.UnlockBits(bmpdata2);
+				SpriteView.Refresh();
 			}
-			SpriteView.sprites.UnlockBits(bmpdata2);
-			SpriteView.Refresh();
 		}
 
 		public unsafe void UpdateValues()
@@ -172,6 +177,7 @@ namespace BizHawk.MultiClient
 			LoadConfigSettings();
 			Nes = Global.Emulator as NES;
 			ClearDetails();
+			RefreshRate.Value = Global.Config.NESPPURefreshRate;
 		}
 
 		private void ClearDetails()