Adds support for NES games

.gitmodules

@@ -13,3 +13,6 @@
 [submodule "Cores/GBCDeltaCore"]
 	path = Cores/GBCDeltaCore
 	url = git@github.com:rileytestut/GBCDeltaCore.git
+[submodule "Cores/NESDeltaCore"]
+	path = Cores/NESDeltaCore
+	url = git@github.com:rileytestut/NESDeltaCore.git

Cores/NESDeltaCore

@@ -0,0 +1 @@
+Subproject commit d83e51d06020045adc4403b9d77e604cf46e34f5

Delta.xcodeproj/project.pbxproj

@@ -97,6 +97,8 @@
 		BF8DDD241F4F6C880088A21B /* InputCalloutView.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF8DDD231F4F6C880088A21B /* InputCalloutView.swift */; };
 		BF95E2771E4977BF0030E7AD /* GameMetadata.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF95E2761E4977BF0030E7AD /* GameMetadata.swift */; };
 		BF95E2791E4982A10030E7AD /* GamesDatabaseBrowserViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF95E2781E4982A10030E7AD /* GamesDatabaseBrowserViewController.swift */; };
+		BF98C9822204D9AB006B95AC /* NESDeltaCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = BF98C9812204D9A1006B95AC /* NESDeltaCore.framework */; };
+		BF98C9832204D9AB006B95AC /* NESDeltaCore.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = BF98C9812204D9A1006B95AC /* NESDeltaCore.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		BF99A5971DC2F9C400468E9E /* ControllerSkinTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF99A5961DC2F9C400468E9E /* ControllerSkinTableViewCell.swift */; };
 		BF99C6941D0A9AA600BA92BC /* SNESDeltaCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = BFC134E01AAD82460087AD7B /* SNESDeltaCore.framework */; };
 		BF99C6951D0A9AA600BA92BC /* SNESDeltaCore.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = BFC134E01AAD82460087AD7B /* SNESDeltaCore.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
@@ -140,6 +142,7 @@
 				BFF0742D1E9DC17500ACDF4A /* GBCDeltaCore.framework in Embed Frameworks */,
 				BFEC732E1AAECC4A00650035 /* Roxas.framework in Embed Frameworks */,
 				BF0418151D01E93400E85BCF /* GBADeltaCore.framework in Embed Frameworks */,
+				BF98C9832204D9AB006B95AC /* NESDeltaCore.framework in Embed Frameworks */,
 				BF99C6951D0A9AA600BA92BC /* SNESDeltaCore.framework in Embed Frameworks */,
 				BF072011219A3A9D00F05DA4 /* ZIPFoundation.framework in Embed Frameworks */,
 			);
@@ -236,6 +239,7 @@
 		BF8DDD231F4F6C880088A21B /* InputCalloutView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InputCalloutView.swift; sourceTree = "<group>"; };
 		BF95E2761E4977BF0030E7AD /* GameMetadata.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GameMetadata.swift; sourceTree = "<group>"; };
 		BF95E2781E4982A10030E7AD /* GamesDatabaseBrowserViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GamesDatabaseBrowserViewController.swift; sourceTree = "<group>"; };
+		BF98C9812204D9A1006B95AC /* NESDeltaCore.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; path = NESDeltaCore.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		BF99A5961DC2F9C400468E9E /* ControllerSkinTableViewCell.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ControllerSkinTableViewCell.swift; sourceTree = "<group>"; };
 		BF9F4FCE1AAD7B87004C9500 /* DeltaCore.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = DeltaCore.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		BFAA1FEC1B8AA4FA00495943 /* Settings.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Settings.swift; sourceTree = "<group>"; };
@@ -272,6 +276,7 @@
 				BF9F4FCF1AAD7B87004C9500 /* DeltaCore.framework in Frameworks */,
 				BFEC732D1AAECC4A00650035 /* Roxas.framework in Frameworks */,
 				BF99C6941D0A9AA600BA92BC /* SNESDeltaCore.framework in Frameworks */,
+				BF98C9822204D9AB006B95AC /* NESDeltaCore.framework in Frameworks */,
 				BF0418141D01E93400E85BCF /* GBADeltaCore.framework in Frameworks */,
 				BF072010219A3A9D00F05DA4 /* ZIPFoundation.framework in Frameworks */,
 				BFF0742C1E9DC17500ACDF4A /* GBCDeltaCore.framework in Frameworks */,
@@ -546,6 +551,7 @@
 		BF9F4FCD1AAD7B25004C9500 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				BF98C9812204D9A1006B95AC /* NESDeltaCore.framework */,
 				BF07200E219A3A9500F05DA4 /* ZIPFoundation.framework */,
 				BFF0742B1E9DC17500ACDF4A /* GBCDeltaCore.framework */,
 				BF0418131D01E93400E85BCF /* GBADeltaCore.framework */,

Delta.xcodeproj/xcshareddata/xcschemes/Delta.xcscheme

@@ -34,6 +34,20 @@
                ReferencedContainer = "container:Cores/DeltaCore/DeltaCore.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "BF3C12F220438F3F0079A4B5"
+               BuildableName = "NESDeltaCore.framework"
+               BlueprintName = "NESDeltaCore"
+               ReferencedContainer = "container:Cores/NESDeltaCore/NESDeltaCore.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
          <BuildActionEntry
             buildForTesting = "YES"
             buildForRunning = "YES"
@@ -56,10 +70,10 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "BFE8E9C91D010AF7009D623D"
+               BlueprintIdentifier = "BF8F2AAD1E9C879300F89F15"
-               BuildableName = "GBADeltaCore.framework"
+               BuildableName = "GBCDeltaCore.framework"
-               BlueprintName = "GBADeltaCore"
+               BlueprintName = "GBCDeltaCore"
-               ReferencedContainer = "container:Cores/GBADeltaCore/GBADeltaCore.xcodeproj">
+               ReferencedContainer = "container:Cores/GBCDeltaCore/GBCDeltaCore.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
          <BuildActionEntry
@@ -70,10 +84,10 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "BF8F2AAD1E9C879300F89F15"
+               BlueprintIdentifier = "BFE8E9C91D010AF7009D623D"
-               BuildableName = "GBCDeltaCore.framework"
+               BuildableName = "GBADeltaCore.framework"
-               BlueprintName = "GBCDeltaCore"
+               BlueprintName = "GBADeltaCore"
-               ReferencedContainer = "container:Cores/GBCDeltaCore/GBCDeltaCore.xcodeproj">
+               ReferencedContainer = "container:Cores/GBADeltaCore/GBADeltaCore.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
          <BuildActionEntry

Delta.xcworkspace/contents.xcworkspacedata

@@ -7,14 +7,17 @@
    <FileRef
       location = "group:Cores/DeltaCore/DeltaCore.xcodeproj">
    </FileRef>
+   <FileRef
+      location = "group:Cores/NESDeltaCore/NESDeltaCore.xcodeproj">
+   </FileRef>
    <FileRef
       location = "group:Cores/SNESDeltaCore/SNESDeltaCore.xcodeproj">
    </FileRef>
    <FileRef
-      location = "group:Cores/GBADeltaCore/GBADeltaCore.xcodeproj">
+      location = "group:Cores/GBCDeltaCore/GBCDeltaCore.xcodeproj">
    </FileRef>
    <FileRef
-      location = "group:Cores/GBCDeltaCore/GBCDeltaCore.xcodeproj">
+      location = "group:Cores/GBADeltaCore/GBADeltaCore.xcodeproj">
    </FileRef>
    <FileRef
       location = "group:External/Roxas/Roxas.xcodeproj">

Delta/AppDelegate.swift

@@ -26,7 +26,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate
         
         Settings.registerDefaults()
         
-        System.supportedSystems.forEach { Delta.register($0.deltaCore) }
+        System.allCases.forEach { Delta.register($0.deltaCore) }
         
         self.configureAppearance()
         

Delta/Base.lproj/Settings.storyboard

@@ -1,12 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13771" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="ssH-mM-uG6">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="ssH-mM-uG6">
     <device id="retina4_7" orientation="portrait">
         <adaptation id="fullscreen"/>
     </device>
     <dependencies>
-        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13772"/>
-        <capability name="Constraints to layout margins" minToolsVersion="6.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -19,7 +17,7 @@
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <color key="backgroundColor" red="0.93725490199999995" green="0.93725490199999995" blue="0.95686274510000002" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                         <label key="tableFooterView" opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Delta 0.6.0" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="Str-BY-agW">
-                            <rect key="frame" x="0.0" y="673" width="375" height="44"/>
+                            <rect key="frame" x="0.0" y="717" width="375" height="44"/>
                             <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                             <fontDescription key="fontDescription" type="system" pointSize="17"/>
                             <color key="textColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
@@ -179,12 +177,29 @@
                                             </subviews>
                                         </tableViewCellContentView>
                                     </tableViewCell>
+                                    <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="XVO-TO-ncw" style="IBUITableViewCellStyleDefault" id="vIu-iy-kRM">
+                                        <rect key="frame" x="0.0" y="419.5" width="375" height="44"/>
+                                        <autoresizingMask key="autoresizingMask"/>
+                                        <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="vIu-iy-kRM" id="FIZ-uw-fR7">
+                                            <rect key="frame" x="0.0" y="0.0" width="341" height="43.5"/>
+                                            <autoresizingMask key="autoresizingMask"/>
+                                            <subviews>
+                                                <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="System Name" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="XVO-TO-ncw">
+                                                    <rect key="frame" x="16" y="0.0" width="324" height="43.5"/>
+                                                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                                                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                                    <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                                    <nil key="highlightedColor"/>
+                                                </label>
+                                            </subviews>
+                                        </tableViewCellContentView>
+                                    </tableViewCell>
                                 </cells>
                             </tableViewSection>
                             <tableViewSection headerTitle="Controller Opacity" footerTitle="Determines how translucent the controller appears, if supported by the controller skin." id="SwK-m9-8gt">
                                 <cells>
                                     <tableViewCell contentMode="scaleToFill" preservesSuperviewLayoutMargins="YES" selectionStyle="none" hidesAccessoryWhenEditing="NO" indentationLevel="1" indentationWidth="0.0" id="Xxk-vo-eu4">
-                                        <rect key="frame" x="0.0" y="483" width="375" height="44"/>
+                                        <rect key="frame" x="0.0" y="527" width="375" height="44"/>
                                         <autoresizingMask key="autoresizingMask"/>
                                         <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" preservesSuperviewLayoutMargins="YES" tableViewCell="Xxk-vo-eu4" id="vxt-Ex-b4b">
                                             <rect key="frame" x="0.0" y="0.0" width="375" height="43.5"/>
@@ -225,10 +240,10 @@
                             <tableViewSection headerTitle="3D Touch" id="fdp-8c-oOc">
                                 <cells>
                                     <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" accessoryType="disclosureIndicator" indentationWidth="10" reuseIdentifier="Cell" textLabel="c5i-qG-ir9" style="IBUITableViewCellStyleDefault" id="SSL-t4-QZj">
-                                        <rect key="frame" x="0.0" y="611" width="375" height="44"/>
+                                        <rect key="frame" x="0.0" y="655" width="375" height="44"/>
                                         <autoresizingMask key="autoresizingMask"/>
                                         <tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="SSL-t4-QZj" id="hQB-Iy-bzy">
-                                            <rect key="frame" x="0.0" y="0.0" width="342" height="43.5"/>
+                                            <rect key="frame" x="0.0" y="0.0" width="349" height="43.5"/>
                                             <autoresizingMask key="autoresizingMask"/>
                                             <subviews>
                                                 <label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="App Icon Shortcuts" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="c5i-qG-ir9">
@@ -482,7 +497,7 @@
                                     <autoresizingMask key="autoresizingMask"/>
                                     <subviews>
                                         <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="4bh-Lf-zgk">
-                                            <rect key="frame" x="310" y="6" width="51" height="31"/>
+                                            <rect key="frame" x="310" y="6.5" width="51" height="31"/>
                                             <connections>
                                                 <action selector="switchGameShortcutsModeWith:" destination="yXS-6u-1AN" eventType="valueChanged" id="bX8-gd-h4g"/>
                                             </connections>

Delta/Database/DatabaseManager.swift

@@ -131,7 +131,7 @@ private extension DatabaseManager
         
         self.performBackgroundTask { (context) in
             
-            for system in System.supportedSystems
+            for system in System.allCases
             {
                 guard let deltaControllerSkin = DeltaCore.ControllerSkin.standardControllerSkin(for: system.gameType) else { continue }
                 

Delta/Extensions/DeltaCoreProtocol+Delta.swift

@@ -15,9 +15,10 @@ extension DeltaCoreProtocol
         
         switch system
         {
+        case .nes: return 1...4
         case .snes: return 1...4
-        case .gba: return 1...3
         case .gbc: return 1...4
+        case .gba: return 1...3
         }
     }
 }

Delta/Extensions/Input+Display.swift

@@ -39,6 +39,13 @@ extension Input
         case .controller(.keyboard):
             let input = KeyboardGameController.Input(input: self)!
             
+            if input == .escape
+            {
+                // The iPad Smart Keyboard doesn't have an escape key, so return lower priority
+                // to ensure it only appears if there is no other key mapped to the same input.
+                return 100
+            }
+            
             // We prefer to display keys with special characters (e.g. arrow keys, shift) over regular keys.
             // If the input's localizedName == it's string value, we can assume it's a normal key, and return a lower priority.
             // Otherwise, it has a special display character, and so we return a higher priority.

Delta/Game Selection/GamesViewController.swift

@@ -300,7 +300,7 @@ extension GamesViewController: ImportControllerDelegate
 {
     @IBAction private func importFiles()
     {
-        var documentTypes = Set(System.supportedSystems.map { $0.gameType.rawValue })
+        var documentTypes = Set(System.allCases.map { $0.gameType.rawValue })
         documentTypes.insert(kUTTypeZipArchive as String)
         
         // Add GBA4iOS's exported UTIs in case user has GBA4iOS installed (which may override Delta's UTI declarations)

Delta/Settings/Controllers/ControllerInputsViewController.swift

@@ -21,7 +21,7 @@ class ControllerInputsViewController: UIViewController
         }
     }
     
-    var system: System = .snes {
+    var system: System = System.allCases[0] {
         didSet {
             guard self.system != oldValue else { return }
             self.updateSystem()
@@ -167,7 +167,7 @@ private extension ControllerInputsViewController
         let popoverMenuController = PopoverMenuController(popoverViewController: navigationController)
         self.navigationItem.popoverMenuController = popoverMenuController
         
-        let items = System.supportedSystems.map { [unowned self, weak popoverMenuController, weak listMenuViewController] system -> MenuItem in
+        let items = System.allCases.map { [unowned self, weak popoverMenuController, weak listMenuViewController] system -> MenuItem in
             let item = MenuItem(text: system.localizedShortName, image: #imageLiteral(resourceName: "CheatCodes")) { [weak popoverMenuController, weak listMenuViewController] item in
                 listMenuViewController?.items.forEach { $0.isSelected = ($0 == item) }
                 popoverMenuController?.isActive = false

Delta/Settings/Controllers/ControllersSettingsViewController.swift

@@ -106,7 +106,6 @@ extension ControllersSettingsViewController
         case "controllerInputsSegue":
             let controllerInputsViewController = (segue.destination as! UINavigationController).topViewController as! ControllerInputsViewController
             controllerInputsViewController.gameController = self.gameController
-            controllerInputsViewController.system = .snes
             
         default: break
         }

Delta/Settings/Settings.swift

@@ -186,9 +186,10 @@ private extension Settings
         
         switch system
         {
+        case .nes: systemName = "nes"
         case .snes: systemName = "snes"
-        case .gba: systemName = "gba"
         case .gbc: systemName = "gbc"
+        case .gba: systemName = "gba"
         }
         
         let orientation: String

Delta/Settings/SettingsViewController.swift

@@ -27,13 +27,6 @@ private extension SettingsViewController
         case controllers = "controllersSegue"
         case controllerSkins = "controllerSkinsSegue"
     }
-    
-    enum ControllerSkinsRow: Int
-    {
-        case snes
-        case gba
-        case gbc
-    }
 }
 
 class SettingsViewController: UITableViewController
@@ -113,13 +106,8 @@ class SettingsViewController: UITableViewController
         case Segue.controllerSkins:
             let systemControllerSkinsViewController = segue.destination as! SystemControllerSkinsViewController
             
-            let row = ControllerSkinsRow(rawValue: indexPath.row)!
+            let system = System.allCases[indexPath.row]
-            switch row
+            systemControllerSkinsViewController.system = system
-            {
-            case .snes: systemControllerSkinsViewController.system = .snes
-            case .gba: systemControllerSkinsViewController.system = .gba
-            case .gbc: systemControllerSkinsViewController.system = .gbc
-            }            
         }
     }
 }
@@ -192,7 +180,7 @@ extension SettingsViewController
         switch section
         {
         case .controllers: return 1 // Temporarily hide other controller indexes until controller logic is finalized
-        case .controllerSkins: return System.supportedSystems.count
+        case .controllerSkins: return System.allCases.count
         default:
             if isSectionHidden(section)
             {
@@ -227,7 +215,7 @@ extension SettingsViewController
                 cell.detailTextLabel?.text = nil
             }
             
-        case .controllerSkins: cell.textLabel?.text = System.supportedSystems[indexPath.row].localizedName
+        case .controllerSkins: cell.textLabel?.text = System.allCases[indexPath.row].localizedName
         default: break
         }
 

Delta/Systems/System.swift

@@ -11,30 +11,14 @@ import DeltaCore
 import SNESDeltaCore
 import GBADeltaCore
 import GBCDeltaCore
+import NESDeltaCore
 
-extension GameType
+enum System: CaseIterable
-{
-    init?(fileExtension: String)
-    {
-        switch fileExtension.lowercased()
-        {
-        case "smc", "sfc", "fig": self = .snes
-        case "gba": self = .gba
-        case "gbc", "gb": self = .gbc
-        default: return nil
-        }
-    }
-}
-
-enum System
 {
+    case nes
     case snes
-    case gba
     case gbc
-    
+    case gba
-    static var supportedSystems: [System] {
-        return [.snes, .gba, .gbc]
-    }
 }
 
 extension System
@@ -42,27 +26,30 @@ extension System
     var localizedName: String {
         switch self
         {
+        case .nes: return NSLocalizedString("Nintendo", comment: "")
         case .snes: return NSLocalizedString("Super Nintendo", comment: "")
-        case .gba: return NSLocalizedString("Game Boy Advance", comment: "")
         case .gbc: return NSLocalizedString("Game Boy Color", comment: "")
+        case .gba: return NSLocalizedString("Game Boy Advance", comment: "")
         }
     }
     
     var localizedShortName: String {
         switch self
         {
+        case .nes: return NSLocalizedString("NES", comment: "")
         case .snes: return NSLocalizedString("SNES", comment: "")
-        case .gba: return NSLocalizedString("GBA", comment: "")
         case .gbc: return NSLocalizedString("GBC", comment: "")
+        case .gba: return NSLocalizedString("GBA", comment: "")
         }
     }
     
     var year: Int {
         switch self
         {
+        case .nes: return 1985
         case .snes: return 1990
-        case .gba: return 2001
         case .gbc: return 1998
+        case .gba: return 2001
         }
     }
 }
@@ -72,21 +59,20 @@ extension System
     var deltaCore: DeltaCoreProtocol {
         switch self
         {
+        case .nes: return NES.core
         case .snes: return SNES.core
-        case .gba: return GBA.core
         case .gbc: return GBC.core
+        case .gba: return GBA.core
         }
     }
-}
+    
-
-extension System
-{
     var gameType: GameType {
         switch self
         {
+        case .nes: return .nes
         case .snes: return .snes
-        case .gba: return .gba
         case .gbc: return .gbc
+        case .gba: return .gba
         }
     }
     
@@ -94,9 +80,25 @@ extension System
     {
         switch gameType
         {
+        case GameType.nes: self = .nes
         case GameType.snes: self = .snes
-        case GameType.gba: self = .gba
         case GameType.gbc: self = .gbc
+        case GameType.gba: self = .gba
+        default: return nil
+        }
+    }
+}
+
+extension GameType
+{
+    init?(fileExtension: String)
+    {
+        switch fileExtension.lowercased()
+        {
+        case "nes": self = .nes
+        case "smc", "sfc", "fig": self = .snes
+        case "gbc", "gb": self = .gbc
+        case "gba": self = .gba
         default: return nil
         }
     }