Add a Extension Preferences dialog in the Config menu, currently it will show .bin and .rom and allow the user to pick a platform or pick "ask me on load" to be asked every time (the default)

BizHawk.Client.Common/RomLoader.cs

@@ -28,13 +28,6 @@ namespace BizHawk.Client.Common
 {
 	public class RomLoader
 	{
-		// These extensions will invoke a platform chooser if not found in the database
-		private readonly List<string> GenericExtensions = new List<string>
-		{
-			".bin",
-			".rom",
-		};
-
 		// helper methods for the settings events
 		private object GetCoreSettings<T>()
 			where T : IEmulator
@@ -126,6 +119,16 @@ namespace BizHawk.Client.Common
 			}
 		}
 
+		private bool PreferredPlatformIsDefined(string extension)
+		{
+			if (Global.Config.PreferredPlatformsForExtensions.ContainsKey(extension))
+			{
+				return !string.IsNullOrEmpty(Global.Config.PreferredPlatformsForExtensions[extension]);
+			}
+
+			return false;
+		}
+
 		public bool LoadRom(string path, CoreComm nextComm)
 		{
 			if (path == null)
@@ -276,12 +279,11 @@ namespace BizHawk.Client.Common
 						if (string.IsNullOrEmpty(rom.GameInfo.System))
 						{
 							// Has the user picked a preference for this extension?
-							if (!string.IsNullOrEmpty(Global.Config.PreferredPlatformsForExtensions[rom.Extension.ToLower()]))
+							if (PreferredPlatformIsDefined(rom.Extension.ToLower()))
 							{
 								rom.GameInfo.System = Global.Config.PreferredPlatformsForExtensions[rom.Extension.ToLower()];
 							}
-							else if (GenericExtensions.Contains(rom.Extension.ToLower()) &&
+							else if (ChoosePlatform != null)
-								ChoosePlatform != null)
 							{
 								rom.GameInfo.System = ChoosePlatform(rom);
 							}

BizHawk.Client.EmuHawk/BizHawk.Client.EmuHawk.csproj

@@ -197,6 +197,18 @@
     <Compile Include="config\DisplayConfigLite.Designer.cs">
       <DependentUpon>DisplayConfigLite.cs</DependentUpon>
     </Compile>
+    <Compile Include="config\FileExtensionPreferences.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="config\FileExtensionPreferences.Designer.cs">
+      <DependentUpon>FileExtensionPreferences.cs</DependentUpon>
+    </Compile>
+    <Compile Include="config\FileExtensionPreferencesPicker.cs">
+      <SubType>UserControl</SubType>
+    </Compile>
+    <Compile Include="config\FileExtensionPreferencesPicker.Designer.cs">
+      <DependentUpon>FileExtensionPreferencesPicker.cs</DependentUpon>
+    </Compile>
     <Compile Include="config\FirmwaresConfig.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -936,6 +948,12 @@
     <EmbeddedResource Include="config\DisplayConfigLite.resx">
       <DependentUpon>DisplayConfigLite.cs</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="config\FileExtensionPreferences.resx">
+      <DependentUpon>FileExtensionPreferences.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="config\FileExtensionPreferencesPicker.resx">
+      <DependentUpon>FileExtensionPreferencesPicker.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="config\FirmwaresConfig.resx">
       <DependentUpon>FirmwaresConfig.cs</DependentUpon>
     </EmbeddedResource>

BizHawk.Client.EmuHawk/MainForm.Designer.cs

@@ -134,6 +134,7 @@
 			this.MessagesMenuItem = new System.Windows.Forms.ToolStripMenuItem();
 			this.AutofireMenuItem = new System.Windows.Forms.ToolStripMenuItem();
 			this.RewindOptionsMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+			this.extensionsToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
 			this.toolStripSeparator9 = new System.Windows.Forms.ToolStripSeparator();
 			this.ConfigEnableSubMenu = new System.Windows.Forms.ToolStripMenuItem();
 			this.EnableContextMenuMenuItem = new System.Windows.Forms.ToolStripMenuItem();
@@ -388,7 +389,7 @@
 			this.MainformMenu.LayoutStyle = System.Windows.Forms.ToolStripLayoutStyle.Flow;
 			this.MainformMenu.Location = new System.Drawing.Point(0, 0);
 			this.MainformMenu.Name = "MainformMenu";
-			this.MainformMenu.Size = new System.Drawing.Size(470, 42);
+			this.MainformMenu.Size = new System.Drawing.Size(470, 61);
 			this.MainformMenu.TabIndex = 0;
 			this.MainformMenu.Text = "menuStrip1";
 			this.MainformMenu.MenuActivate += new System.EventHandler(this.MainformMenu_MenuActivate);
@@ -1238,6 +1239,7 @@
             this.MessagesMenuItem,
             this.AutofireMenuItem,
             this.RewindOptionsMenuItem,
+            this.extensionsToolStripMenuItem,
             this.toolStripSeparator9,
             this.ConfigEnableSubMenu,
             this.GuiSubMenu,
@@ -1258,7 +1260,7 @@
 			// 
 			this.ControllersMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.GameController;
 			this.ControllersMenuItem.Name = "ControllersMenuItem";
-			this.ControllersMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.ControllersMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.ControllersMenuItem.Text = "&Controllers...";
 			this.ControllersMenuItem.Click += new System.EventHandler(this.ControllersMenuItem_Click);
 			// 
@@ -1266,7 +1268,7 @@
 			// 
 			this.HotkeysMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.HotKeys;
 			this.HotkeysMenuItem.Name = "HotkeysMenuItem";
-			this.HotkeysMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.HotkeysMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.HotkeysMenuItem.Text = "&Hotkeys...";
 			this.HotkeysMenuItem.Click += new System.EventHandler(this.HotkeysMenuItem_Click);
 			// 
@@ -1274,7 +1276,7 @@
 			// 
 			this.DisplayConfigMenuItem.Image = ((System.Drawing.Image)(resources.GetObject("DisplayConfigMenuItem.Image")));
 			this.DisplayConfigMenuItem.Name = "DisplayConfigMenuItem";
-			this.DisplayConfigMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.DisplayConfigMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.DisplayConfigMenuItem.Text = "Display...";
 			this.DisplayConfigMenuItem.Click += new System.EventHandler(this.DisplayConfigMenuItem_Click);
 			// 
@@ -1282,7 +1284,7 @@
 			// 
 			this.SoundMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.AudioHS;
 			this.SoundMenuItem.Name = "SoundMenuItem";
-			this.SoundMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.SoundMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.SoundMenuItem.Text = "&Sound...";
 			this.SoundMenuItem.Click += new System.EventHandler(this.SoundMenuItem_Click);
 			// 
@@ -1290,7 +1292,7 @@
 			// 
 			this.PathsMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.CopyFolderHS;
 			this.PathsMenuItem.Name = "PathsMenuItem";
-			this.PathsMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.PathsMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.PathsMenuItem.Text = "Paths...";
 			this.PathsMenuItem.Click += new System.EventHandler(this.PathsMenuItem_Click);
 			// 
@@ -1298,7 +1300,7 @@
 			// 
 			this.FirmwaresMenuItem.Image = ((System.Drawing.Image)(resources.GetObject("FirmwaresMenuItem.Image")));
 			this.FirmwaresMenuItem.Name = "FirmwaresMenuItem";
-			this.FirmwaresMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.FirmwaresMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.FirmwaresMenuItem.Text = "&Firmwares";
 			this.FirmwaresMenuItem.Click += new System.EventHandler(this.FirmwaresMenuItem_Click);
 			// 
@@ -1306,7 +1308,7 @@
 			// 
 			this.MessagesMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.MessageConfig;
 			this.MessagesMenuItem.Name = "MessagesMenuItem";
-			this.MessagesMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.MessagesMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.MessagesMenuItem.Text = "&Messages...";
 			this.MessagesMenuItem.Click += new System.EventHandler(this.MessagesMenuItem_Click);
 			// 
@@ -1314,7 +1316,7 @@
 			// 
 			this.AutofireMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.Lightning;
 			this.AutofireMenuItem.Name = "AutofireMenuItem";
-			this.AutofireMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.AutofireMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.AutofireMenuItem.Text = "&Autofire...";
 			this.AutofireMenuItem.Click += new System.EventHandler(this.AutofireMenuItem_Click);
 			// 
@@ -1322,14 +1324,21 @@
 			// 
 			this.RewindOptionsMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.Previous;
 			this.RewindOptionsMenuItem.Name = "RewindOptionsMenuItem";
-			this.RewindOptionsMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.RewindOptionsMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.RewindOptionsMenuItem.Text = "&Rewind...";
 			this.RewindOptionsMenuItem.Click += new System.EventHandler(this.RewindOptionsMenuItem_Click);
 			// 
+			// extensionsToolStripMenuItem
+			// 
+			this.extensionsToolStripMenuItem.Name = "extensionsToolStripMenuItem";
+			this.extensionsToolStripMenuItem.Size = new System.Drawing.Size(159, 22);
+			this.extensionsToolStripMenuItem.Text = "File Extensions...";
+			this.extensionsToolStripMenuItem.Click += new System.EventHandler(this.extensionsToolStripMenuItem_Click);
+			// 
 			// toolStripSeparator9
 			// 
 			this.toolStripSeparator9.Name = "toolStripSeparator9";
-			this.toolStripSeparator9.Size = new System.Drawing.Size(149, 6);
+			this.toolStripSeparator9.Size = new System.Drawing.Size(156, 6);
 			// 
 			// ConfigEnableSubMenu
 			// 
@@ -1341,7 +1350,7 @@
             this.FrameAdvanceSkipLagMenuItem,
             this.BackupSaveramMenuItem});
 			this.ConfigEnableSubMenu.Name = "ConfigEnableSubMenu";
-			this.ConfigEnableSubMenu.Size = new System.Drawing.Size(152, 22);
+			this.ConfigEnableSubMenu.Size = new System.Drawing.Size(159, 22);
 			this.ConfigEnableSubMenu.Text = "&Enable";
 			this.ConfigEnableSubMenu.DropDownOpened += new System.EventHandler(this.EnableMenuItem_DropDownOpened);
 			// 
@@ -1403,7 +1412,7 @@
             this.toolStripSeparator23,
             this.LogWindowAsConsoleMenuItem});
 			this.GuiSubMenu.Name = "GuiSubMenu";
-			this.GuiSubMenu.Size = new System.Drawing.Size(152, 22);
+			this.GuiSubMenu.Size = new System.Drawing.Size(159, 22);
 			this.GuiSubMenu.Text = "GUI";
 			this.GuiSubMenu.DropDownOpened += new System.EventHandler(this.GuiSubMenu_DropDownOpened);
 			// 
@@ -1514,7 +1523,7 @@
             this.Speed150MenuItem,
             this.Speed200MenuItem});
 			this.SpeedSkipSubMenu.Name = "SpeedSkipSubMenu";
-			this.SpeedSkipSubMenu.Size = new System.Drawing.Size(152, 22);
+			this.SpeedSkipSubMenu.Size = new System.Drawing.Size(159, 22);
 			this.SpeedSkipSubMenu.Text = "Speed/Skip";
 			this.SpeedSkipSubMenu.DropDownOpened += new System.EventHandler(this.FrameSkipMenuItem_DropDownOpened);
 			// 
@@ -1680,7 +1689,7 @@
             this.InputOverHkMenuItem,
             this.HkOverInputMenuItem});
 			this.KeyPrioritySubMenu.Name = "KeyPrioritySubMenu";
-			this.KeyPrioritySubMenu.Size = new System.Drawing.Size(152, 22);
+			this.KeyPrioritySubMenu.Size = new System.Drawing.Size(159, 22);
 			this.KeyPrioritySubMenu.Text = "Key Priority";
 			this.KeyPrioritySubMenu.DropDownOpened += new System.EventHandler(this.KeyPriorityMenuItem_DropDownOpened);
 			// 
@@ -1712,7 +1721,7 @@
             this.SavestateBinaryMenuItem,
             this.SavestateTextMenuItem});
 			this.SavestateTypeSubMenu.Name = "SavestateTypeSubMenu";
-			this.SavestateTypeSubMenu.Size = new System.Drawing.Size(152, 22);
+			this.SavestateTypeSubMenu.Size = new System.Drawing.Size(159, 22);
 			this.SavestateTypeSubMenu.Text = "Savestate Type";
 			this.SavestateTypeSubMenu.DropDownOpened += new System.EventHandler(this.SavestateTypeMenuItem_DropDownOpened);
 			// 
@@ -1740,13 +1749,13 @@
 			// toolStripSeparator10
 			// 
 			this.toolStripSeparator10.Name = "toolStripSeparator10";
-			this.toolStripSeparator10.Size = new System.Drawing.Size(149, 6);
+			this.toolStripSeparator10.Size = new System.Drawing.Size(156, 6);
 			// 
 			// SaveConfigMenuItem
 			// 
 			this.SaveConfigMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.Save;
 			this.SaveConfigMenuItem.Name = "SaveConfigMenuItem";
-			this.SaveConfigMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.SaveConfigMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.SaveConfigMenuItem.Text = "Save Config";
 			this.SaveConfigMenuItem.Click += new System.EventHandler(this.SaveConfigMenuItem_Click);
 			// 
@@ -1754,14 +1763,14 @@
 			// 
 			this.LoadConfigMenuItem.Image = global::BizHawk.Client.EmuHawk.Properties.Resources.LoadConfig;
 			this.LoadConfigMenuItem.Name = "LoadConfigMenuItem";
-			this.LoadConfigMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.LoadConfigMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.LoadConfigMenuItem.Text = "Load Config";
 			this.LoadConfigMenuItem.Click += new System.EventHandler(this.LoadConfigMenuItem_Click);
 			// 
 			// toolStripSeparator8
 			// 
 			this.toolStripSeparator8.Name = "toolStripSeparator8";
-			this.toolStripSeparator8.Size = new System.Drawing.Size(149, 6);
+			this.toolStripSeparator8.Size = new System.Drawing.Size(156, 6);
 			// 
 			// coreSelectionToolStripMenuItem
 			// 
@@ -1769,7 +1778,7 @@
             this.gBInSGBToolStripMenuItem,
             this.nESInQuickNESToolStripMenuItem});
 			this.coreSelectionToolStripMenuItem.Name = "coreSelectionToolStripMenuItem";
-			this.coreSelectionToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
+			this.coreSelectionToolStripMenuItem.Size = new System.Drawing.Size(159, 22);
 			this.coreSelectionToolStripMenuItem.Text = "Core Selection";
 			this.coreSelectionToolStripMenuItem.DropDownOpened += new System.EventHandler(this.coreSelectionToolStripMenuItem_DropDownOpened);
 			this.coreSelectionToolStripMenuItem.Click += new System.EventHandler(this.coreSelectionToolStripMenuItem_Click);
@@ -3485,6 +3494,7 @@
 		private System.Windows.Forms.ToolStripMenuItem SMSdisplayPalToolStripMenuItem;
 		private System.Windows.Forms.ToolStripMenuItem SMSdisplayAutoToolStripMenuItem;
 		private System.Windows.Forms.ToolStripSeparator toolStripSeparator26;
+		private System.Windows.Forms.ToolStripMenuItem extensionsToolStripMenuItem;
 	}
 }
 

BizHawk.Client.EmuHawk/MainForm.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Drawing;
 using System.Drawing.Imaging;
 using System.IO;
@@ -492,6 +493,45 @@ namespace BizHawk.Client.EmuHawk
 		public bool UpdateFrame = false;
 		public bool EmulatorPaused { get; private set; }
 
+		// Because we don't have enough places where we list SystemID's
+		public Dictionary<string, string> SupportedPlatforms
+		{
+			get
+			{
+				var released = new Dictionary<string, string>
+				{
+					{ "A26", "Atari 2600" },
+					{ "A78", "Atari 7800" },
+
+					{ "NES", "Nintendo Entertainment System/Famicom" },
+					{ "SNES", "Super Nintendo" },
+					{ "N64", "Nintendo 64" },
+
+					{ "GB", "Game Boy" },
+					{ "GBC", "Game Boy Color" },
+
+					{ "SMS", "Sega Master System" },
+					{ "GG", "Sega Game Gear" },
+					{ "SG", "SG-1000" },
+					{ "GEN", "Sega Genesis/Megadrive" },
+					{ "SAT", "Sega Saturn" },
+
+					{ "PCE", "PC Engine/TurboGrafx 16" },
+
+					{ "Coleco", "Colecovision" },
+					{ "TI83", "TI-83 Calculator" }
+				};
+
+				if (VersionInfo.INTERIM)
+				{
+					released.Add("GBA", "Gameboy Advance");
+					released.Add("C64", "Commodore 64");
+				}
+
+				return released;
+			}
+		}
+
 		#endregion
 
 		#region Public Methods
@@ -3118,5 +3158,10 @@ namespace BizHawk.Client.EmuHawk
 		{
 			GlobalWin.Tools.Load<GenVDPViewer>();
 		}
+
+		private void extensionsToolStripMenuItem_Click(object sender, EventArgs e)
+		{
+			new FileExtensionPreferences().ShowDialog();
+		}
 	}
 }

BizHawk.Client.EmuHawk/PlatformChooser.cs

@@ -13,31 +13,6 @@ namespace BizHawk.Client.EmuHawk
 {
 	public partial class PlatformChooser : Form
 	{
-		// Because we don't have enough places where we list SystemID's
-		private readonly Dictionary<string, string> Platforms = new Dictionary<string,string>
-		{
-			
-			{ "A26", "Atari 2600" },
-			{ "A78", "Atari 7800" },
-
-			{ "NES", "Nintendo Entertainment System" },
-			{ "SNES", "Super Nintendo" },
-			{ "N64", "Nintendo 64" },
-
-			{ "GB", "Game Boy" },
-			{ "GBC", "Game Boy Color" },
-
-			{ "PCE", "PC Engine/TurboGrafx 16" },
-			{ "SGX", "Super Grafx" },
-
-			{ "SMS", "Sega Master System" },
-			{ "GG", "Sega Game Gear" },
-			{ "SG", "SG-1000" },
-			{ "GEN", "Sega Genesis" },
-
-			{ "Coleco", "Colecovision" },
-		};
-
 		public RomGame RomGame { get; set; }
 		public string PlatformChoice { get; set; }
 
@@ -69,7 +44,7 @@ namespace BizHawk.Client.EmuHawk
 
 			int count = 0;
 			int spacing = 25;
-			foreach (var platform in Platforms)
+			foreach (var platform in GlobalWin.MainForm.SupportedPlatforms)
 			{
 				var radio = new RadioButton
 				{
@@ -96,7 +71,7 @@ namespace BizHawk.Client.EmuHawk
 		private void OkBtn_Click(object sender, EventArgs e)
 		{
 			var selectedValue = SelectedRadio != null ? SelectedRadio.Text : string.Empty;
-			PlatformChoice = Platforms.FirstOrDefault(x => x.Value == selectedValue).Key;
+			PlatformChoice = GlobalWin.MainForm.SupportedPlatforms.FirstOrDefault(x => x.Value == selectedValue).Key;
 
 			if (AlwaysCheckbox.Checked)
 			{

BizHawk.Client.EmuHawk/config/FileExtensionPreferences.Designer.cs

@@ -0,0 +1,131 @@
+namespace BizHawk.Client.EmuHawk
+{
+	partial class FileExtensionPreferences
+	{
+		/// <summary>
+		/// Required designer variable.
+		/// </summary>
+		private System.ComponentModel.IContainer components = null;
+
+		/// <summary>
+		/// Clean up any resources being used.
+		/// </summary>
+		/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+		protected override void Dispose(bool disposing)
+		{
+			if (disposing && (components != null))
+			{
+				components.Dispose();
+			}
+			base.Dispose(disposing);
+		}
+
+		#region Windows Form Designer generated code
+
+		/// <summary>
+		/// Required method for Designer support - do not modify
+		/// the contents of this method with the code editor.
+		/// </summary>
+		private void InitializeComponent()
+		{
+			this.OkBtn = new System.Windows.Forms.Button();
+			this.CancelBtn = new System.Windows.Forms.Button();
+			this.PrefPanel = new System.Windows.Forms.Panel();
+			this.label1 = new System.Windows.Forms.Label();
+			this.label2 = new System.Windows.Forms.Label();
+			this.label3 = new System.Windows.Forms.Label();
+			this.SuspendLayout();
+			// 
+			// OkBtn
+			// 
+			this.OkBtn.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
+			this.OkBtn.Location = new System.Drawing.Point(232, 187);
+			this.OkBtn.Name = "OkBtn";
+			this.OkBtn.Size = new System.Drawing.Size(60, 23);
+			this.OkBtn.TabIndex = 0;
+			this.OkBtn.Text = "&Ok";
+			this.OkBtn.UseVisualStyleBackColor = true;
+			this.OkBtn.Click += new System.EventHandler(this.OkBtn_Click);
+			// 
+			// CancelBtn
+			// 
+			this.CancelBtn.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
+			this.CancelBtn.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+			this.CancelBtn.Location = new System.Drawing.Point(298, 187);
+			this.CancelBtn.Name = "CancelBtn";
+			this.CancelBtn.Size = new System.Drawing.Size(60, 23);
+			this.CancelBtn.TabIndex = 1;
+			this.CancelBtn.Text = "&Cancel";
+			this.CancelBtn.UseVisualStyleBackColor = true;
+			this.CancelBtn.Click += new System.EventHandler(this.CancelBtn_Click);
+			// 
+			// PrefPanel
+			// 
+			this.PrefPanel.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+			this.PrefPanel.Location = new System.Drawing.Point(12, 55);
+			this.PrefPanel.Name = "PrefPanel";
+			this.PrefPanel.Size = new System.Drawing.Size(346, 126);
+			this.PrefPanel.TabIndex = 2;
+			// 
+			// label1
+			// 
+			this.label1.AutoSize = true;
+			this.label1.Location = new System.Drawing.Point(12, 9);
+			this.label1.Name = "label1";
+			this.label1.Size = new System.Drawing.Size(296, 13);
+			this.label1.TabIndex = 3;
+			this.label1.Text = "Select a preferred Platform to run for the given file extensions.";
+			// 
+			// label2
+			// 
+			this.label2.AutoSize = true;
+			this.label2.Location = new System.Drawing.Point(12, 24);
+			this.label2.Name = "label2";
+			this.label2.Size = new System.Drawing.Size(352, 13);
+			this.label2.TabIndex = 4;
+			this.label2.Text = "Note: The game database overrides these options.  They only take effect";
+			// 
+			// label3
+			// 
+			this.label3.AutoSize = true;
+			this.label3.Location = new System.Drawing.Point(12, 39);
+			this.label3.Name = "label3";
+			this.label3.Size = new System.Drawing.Size(245, 13);
+			this.label3.TabIndex = 5;
+			this.label3.Text = "when a Rom is unable to be found in the database";
+			// 
+			// FileExtensionPreferences
+			// 
+			this.AcceptButton = this.OkBtn;
+			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+			this.CancelButton = this.CancelBtn;
+			this.ClientSize = new System.Drawing.Size(370, 222);
+			this.Controls.Add(this.label3);
+			this.Controls.Add(this.label2);
+			this.Controls.Add(this.label1);
+			this.Controls.Add(this.PrefPanel);
+			this.Controls.Add(this.CancelBtn);
+			this.Controls.Add(this.OkBtn);
+			this.Name = "FileExtensionPreferences";
+			this.ShowIcon = false;
+			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
+			this.Text = "File Extension Preferences";
+			this.Load += new System.EventHandler(this.FileExtensionPreferences_Load);
+			this.ResumeLayout(false);
+			this.PerformLayout();
+
+		}
+
+		#endregion
+
+		private System.Windows.Forms.Button OkBtn;
+		private System.Windows.Forms.Button CancelBtn;
+		private System.Windows.Forms.Panel PrefPanel;
+		private System.Windows.Forms.Label label1;
+		private System.Windows.Forms.Label label2;
+		private System.Windows.Forms.Label label3;
+	}
+}

BizHawk.Client.EmuHawk/config/FileExtensionPreferences.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+
+using BizHawk.Client.Common;
+
+namespace BizHawk.Client.EmuHawk
+{
+	public partial class FileExtensionPreferences : Form
+	{
+		public FileExtensionPreferences()
+		{
+			InitializeComponent();
+		}
+
+		private void FileExtensionPreferences_Load(object sender, EventArgs e)
+		{
+			int spacing = 30;
+			int count = 0;
+			foreach (var kvp in Global.Config.PreferredPlatformsForExtensions)
+			{
+				FileExtensionPreferencesPicker picker = new FileExtensionPreferencesPicker
+				{
+					FileExtension = kvp.Key,
+					OriginalPreference = kvp.Value,
+					Location = new Point(15, 15 + (spacing * count))
+				};
+
+				count++;
+				PrefPanel.Controls.Add(picker);
+			}
+		}
+
+		private void OkBtn_Click(object sender, EventArgs e)
+		{
+
+			foreach (var picker in PrefPanel.Controls.OfType<FileExtensionPreferencesPicker>())
+			{
+				Global.Config.PreferredPlatformsForExtensions[picker.FileExtension] = picker.CurrentlySelectedSystemId;
+			}
+
+			GlobalWin.OSD.AddMessage("Rom Extension Preferences changed");
+			Close();
+		}
+
+		private void CancelBtn_Click(object sender, EventArgs e)
+		{
+			GlobalWin.OSD.AddMessage("Rom Extension Preferences cancelled");
+			Close();
+		}
+	}
+}

BizHawk.Client.EmuHawk/config/FileExtensionPreferences.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

BizHawk.Client.EmuHawk/config/FileExtensionPreferencesPicker.Designer.cs

@@ -0,0 +1,72 @@
+namespace BizHawk.Client.EmuHawk
+{
+	partial class FileExtensionPreferencesPicker
+	{
+		/// <summary> 
+		/// Required designer variable.
+		/// </summary>
+		private System.ComponentModel.IContainer components = null;
+
+		/// <summary> 
+		/// Clean up any resources being used.
+		/// </summary>
+		/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+		protected override void Dispose(bool disposing)
+		{
+			if (disposing && (components != null))
+			{
+				components.Dispose();
+			}
+			base.Dispose(disposing);
+		}
+
+		#region Component Designer generated code
+
+		/// <summary> 
+		/// Required method for Designer support - do not modify 
+		/// the contents of this method with the code editor.
+		/// </summary>
+		private void InitializeComponent()
+		{
+			this.FileExtensionLabel = new System.Windows.Forms.Label();
+			this.PlatformDropdown = new System.Windows.Forms.ComboBox();
+			this.SuspendLayout();
+			// 
+			// FileExtensionLabel
+			// 
+			this.FileExtensionLabel.AutoSize = true;
+			this.FileExtensionLabel.Location = new System.Drawing.Point(3, 5);
+			this.FileExtensionLabel.Name = "FileExtensionLabel";
+			this.FileExtensionLabel.Size = new System.Drawing.Size(24, 13);
+			this.FileExtensionLabel.TabIndex = 0;
+			this.FileExtensionLabel.Text = ".bin";
+			// 
+			// PlatformDropdown
+			// 
+			this.PlatformDropdown.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+			this.PlatformDropdown.FormattingEnabled = true;
+			this.PlatformDropdown.Location = new System.Drawing.Point(37, 2);
+			this.PlatformDropdown.Name = "PlatformDropdown";
+			this.PlatformDropdown.Size = new System.Drawing.Size(142, 21);
+			this.PlatformDropdown.TabIndex = 1;
+			// 
+			// FileExtensionPreferencesPicker
+			// 
+			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+			this.Controls.Add(this.PlatformDropdown);
+			this.Controls.Add(this.FileExtensionLabel);
+			this.Name = "FileExtensionPreferencesPicker";
+			this.Size = new System.Drawing.Size(182, 29);
+			this.Load += new System.EventHandler(this.FileExtensionPreferencesPicker_Load);
+			this.ResumeLayout(false);
+			this.PerformLayout();
+
+		}
+
+		#endregion
+
+		private System.Windows.Forms.Label FileExtensionLabel;
+		private System.Windows.Forms.ComboBox PlatformDropdown;
+	}
+}

BizHawk.Client.EmuHawk/config/FileExtensionPreferencesPicker.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+
+using BizHawk.Client.Common;
+
+namespace BizHawk.Client.EmuHawk
+{
+	public partial class FileExtensionPreferencesPicker : UserControl
+	{
+		public FileExtensionPreferencesPicker()
+		{
+			InitializeComponent();
+		}
+
+		public string FileExtension { get; set; }
+		public string OriginalPreference { get; set; }
+
+		public string CurrentlySelectedSystemId
+		{
+			get
+			{
+				if (PlatformDropdown.SelectedIndex > 0)
+				{
+					return GlobalWin.MainForm.SupportedPlatforms
+						.FirstOrDefault(x => x.Value == PlatformDropdown.SelectedItem.ToString()).Key;
+				}
+
+				return string.Empty;
+			}
+		}
+
+		private void PopulatePlatforms()
+		{
+			PlatformDropdown.Items.Add("Ask me on load");
+			foreach (var platform in GlobalWin.MainForm.SupportedPlatforms)
+			{
+				PlatformDropdown.Items.Add(platform.Value);
+			}
+		}
+
+		private IEnumerable<string> DropdownSystemIds
+		{
+			get
+			{
+				var dispVals = PlatformDropdown.Items.OfType<string>();
+
+				foreach (var val in dispVals)
+				{
+					yield return GlobalWin.MainForm.SupportedPlatforms.FirstOrDefault(x => x.Value == val).Key ?? string.Empty;
+				}
+			}
+		}
+
+		private void FileExtensionPreferencesPicker_Load(object sender, EventArgs e)
+		{
+			PopulatePlatforms();
+
+			var selectedSystemId = Global.Config.PreferredPlatformsForExtensions[FileExtension];
+			if (!string.IsNullOrEmpty(selectedSystemId))
+			{
+				var selectedDispString = GlobalWin.MainForm.SupportedPlatforms[selectedSystemId];
+
+				var selectedItem = PlatformDropdown.Items
+					.OfType<string>()
+					.FirstOrDefault(item => item == selectedDispString);
+
+				if (selectedItem != null)
+				{
+					PlatformDropdown.SelectedItem = selectedItem;
+				}
+				else
+				{
+					PlatformDropdown.SelectedIndex = 0;
+				}
+			}
+			else
+			{
+				PlatformDropdown.SelectedIndex = 0;
+			}
+
+			FileExtensionLabel.Text = FileExtension;
+		}
+	}
+}

BizHawk.Client.EmuHawk/config/FileExtensionPreferencesPicker.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>