Added the option for the CSCathodeRayView to show only a subsection of the full scan area. Zoomed in a little on the 2600. Put in enough piping to give the Electron sight of its ROMs at least.

Machines/Electron/Electron.cpp

@@ -23,6 +23,8 @@ Machine::~Machine()
 
 unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value)
 {
+	printf("%04x\n", address);
+
 	if(address < 32768)
 	{
 		if(isReadOperation(operation))

OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj

@@ -298,6 +298,8 @@
 		4BB73EAC1B587A5100552FC2 /* MainMenu.xib in Resources */ = {isa = PBXBuildFile; fileRef = 4BB73EAA1B587A5100552FC2 /* MainMenu.xib */; };
 		4BB73EB71B587A5100552FC2 /* AllSuiteATests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4BB73EB61B587A5100552FC2 /* AllSuiteATests.swift */; };
 		4BB73EC21B587A5100552FC2 /* Clock_SignalUITests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4BB73EC11B587A5100552FC2 /* Clock_SignalUITests.swift */; };
+		4BE5F85E1C3E1C2500C43F01 /* basic.rom in Resources */ = {isa = PBXBuildFile; fileRef = 4BE5F85C1C3E1C2500C43F01 /* basic.rom */; };
+		4BE5F85F1C3E1C2500C43F01 /* os.rom in Resources */ = {isa = PBXBuildFile; fileRef = 4BE5F85D1C3E1C2500C43F01 /* os.rom */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -630,6 +632,8 @@
 		4BB73EC11B587A5100552FC2 /* Clock_SignalUITests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Clock_SignalUITests.swift; sourceTree = "<group>"; };
 		4BB73EC31B587A5100552FC2 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		4BB73ECF1B587A6700552FC2 /* Clock Signal.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.xml; path = "Clock Signal.entitlements"; sourceTree = "<group>"; };
+		4BE5F85C1C3E1C2500C43F01 /* basic.rom */ = {isa = PBXFileReference; lastKnownFileType = file; path = basic.rom; sourceTree = "<group>"; };
+		4BE5F85D1C3E1C2500C43F01 /* os.rom */ = {isa = PBXFileReference; lastKnownFileType = file; path = os.rom; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -1040,6 +1044,7 @@
 		4BB73EA01B587A5100552FC2 /* Clock Signal */ = {
 			isa = PBXGroup;
 			children = (
+				4BE5F85A1C3E1C2500C43F01 /* Resources */,
 				4BB73ECF1B587A6700552FC2 /* Clock Signal.entitlements */,
 				4B1414501B58848C00E04248 /* ClockSignal-Bridging-Header.h */,
 				4BB73EAD1B587A5100552FC2 /* Info.plist */,
@@ -1097,6 +1102,23 @@
 			path = ../../Processors;
 			sourceTree = "<group>";
 		};
+		4BE5F85A1C3E1C2500C43F01 /* Resources */ = {
+			isa = PBXGroup;
+			children = (
+				4BE5F85B1C3E1C2500C43F01 /* Electron */,
+			);
+			path = Resources;
+			sourceTree = "<group>";
+		};
+		4BE5F85B1C3E1C2500C43F01 /* Electron */ = {
+			isa = PBXGroup;
+			children = (
+				4BE5F85C1C3E1C2500C43F01 /* basic.rom */,
+				4BE5F85D1C3E1C2500C43F01 /* os.rom */,
+			);
+			path = Electron;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -1208,8 +1230,10 @@
 			files = (
 				4B2E2D951C399D1200138695 /* ElectronDocument.xib in Resources */,
 				4BB73EA91B587A5100552FC2 /* Assets.xcassets in Resources */,
+				4BE5F85F1C3E1C2500C43F01 /* os.rom in Resources */,
 				4BB73EA71B587A5100552FC2 /* Atari2600Document.xib in Resources */,
 				4BB73EAC1B587A5100552FC2 /* MainMenu.xib in Resources */,
+				4BE5F85E1C3E1C2500C43F01 /* basic.rom in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

OSBindings/Mac/Clock Signal/Documents/Atari2600Document.swift

@@ -19,6 +19,7 @@ class Atari2600Document: MachineDocument {
 	override func windowControllerDidLoadNib(aController: NSWindowController) {
 		super.windowControllerDidLoadNib(aController)
 		atari2600.view = openGLView
+		openGLView.frameBounds = CGRectMake(0.1, 0.1, 0.8, 0.8)
 	}
 
 	override class func autosavesInPlace() -> Bool {

OSBindings/Mac/Clock Signal/Documents/ElectronDocument.swift

@@ -14,6 +14,13 @@ class ElectronDocument: MachineDocument {
 	override init() {
 		super.init()
 		self.intendedCyclesPerSecond = 2000000
+
+		if let osPath = NSBundle.mainBundle().pathForResource("os", ofType: "rom") {
+			electron.setOSROM(NSData(contentsOfFile: osPath)!)
+		}
+		if let basicPath = NSBundle.mainBundle().pathForResource("basic", ofType: "rom") {
+			electron.setBASICROM(NSData(contentsOfFile: basicPath)!)
+		}
 	}
 
 //	override func windowControllerDidLoadNib(aController: NSWindowController) {

OSBindings/Mac/Clock Signal/Views/CSCathodeRayView.h

@@ -37,4 +37,8 @@ typedef NS_ENUM(NSInteger, CSCathodeRayViewSignalType) {
 - (BOOL)pushFrame:(nonnull CRTFrame *)crtFrame;
 - (void)setSignalDecoder:(nonnull NSString *)decoder type:(CSCathodeRayViewSignalType)type;
 
+// these are relative to a [0, 1] range in both width and height;
+// default is .origin = (0, 0), .size = (1, 1)
+@property (nonatomic, assign) CGRect frameBounds;
+
 @end

OSBindings/Mac/Clock Signal/Views/CSCathodeRayView.m

@@ -25,6 +25,7 @@
 	GLint _lateralAttribute;
 
 	GLint _textureSizeUniform, _windowSizeUniform;
+	GLint _boundsOriginUniform, _boundsSizeUniform;
 	GLint _alphaUniform;
 
 	GLuint _textureName, _shadowMaskTextureName;
@@ -117,6 +118,12 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
 	glDeleteProgram(_shaderProgram);
 }
 
+- (NSPoint)backingViewSize
+{
+	NSPoint backingSize = {.x = self.bounds.size.width, .y = self.bounds.size.height};
+	return [self convertPointToBacking:backingSize];
+}
+
 - (void)reshape
 {
 	[super reshape];
@@ -124,15 +131,35 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
 	[self.openGLContext makeCurrentContext];
 	CGLLockContext([[self openGLContext] CGLContextObj]);
 
-	NSPoint backingSize = {.x = self.bounds.size.width, .y = self.bounds.size.height};
-	NSPoint viewSize = [self convertPointToBacking:backingSize];
+	NSPoint viewSize = [self backingViewSize];
 	glViewport(0, 0, (GLsizei)viewSize.x, (GLsizei)viewSize.y);
 
-	glUniform2f(_windowSizeUniform, (GLfloat)viewSize.x, (GLfloat)viewSize.y);
+	[self pushSizeUniforms];
 
 	CGLUnlockContext([[self openGLContext] CGLContextObj]);
 }
 
+- (void)setFrameBounds:(CGRect)frameBounds
+{
+	_frameBounds = frameBounds;
+
+	[self.openGLContext makeCurrentContext];
+	CGLLockContext([[self openGLContext] CGLContextObj]);
+
+	[self pushSizeUniforms];
+
+	CGLUnlockContext([[self openGLContext] CGLContextObj]);
+}
+
+- (void)pushSizeUniforms
+{
+	NSPoint viewSize = [self backingViewSize];
+	glUniform2f(_windowSizeUniform, (GLfloat)viewSize.x, (GLfloat)viewSize.y);
+
+	glUniform2f(_boundsOriginUniform, (GLfloat)_frameBounds.origin.x, (GLfloat)_frameBounds.origin.y);
+	glUniform2f(_boundsSizeUniform, (GLfloat)_frameBounds.size.width, (GLfloat)_frameBounds.size.height);
+}
+
 - (void)awakeFromNib
 {
 	NSOpenGLPixelFormatAttribute attributes[] =
@@ -159,6 +186,9 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
 	self.pixelFormat = pixelFormat;
 	self.openGLContext = context;
 	self.wantsBestResolutionOpenGLSurface = YES;
+
+	// establish default instance variable values
+	self.frameBounds = CGRectMake(0.0, 0.0, 1.0, 1.0);
 }
 
 - (GLint)formatForDepth:(unsigned int)depth
@@ -267,6 +297,9 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
 		"in vec2 srcCoordinates;\n"
 		"in float lateral;\n"
 		"\n"
+		"uniform vec2 boundsOrigin;\n"
+		"uniform vec2 boundsSize;\n"
+		"\n"
 		"out float lateralVarying;\n"
 		"out vec2 shadowMaskCoordinates;\n"
 		"\n"
@@ -283,9 +316,12 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
 			"\n"
 			"%@\n"
 			"\n"
-			"gl_Position = vec4(position.x * 2.0 - 1.0, 1.0 - position.y * 2.0 + position.x / 131.0, 0.0, 1.0);\n"
+			"vec2 mappedPosition = (position - boundsOrigin) / boundsSize;"
+			"gl_Position = vec4(mappedPosition.x * 2.0 - 1.0, 1.0 - mappedPosition.y * 2.0, 0.0, 1.0);\n"
 		"}\n";
 
+// + mappedPosition.x / 131.0
+
 	switch(_signalType)
 	{
 		case CSCathodeRayViewSignalTypeNTSC: return [NSString stringWithFormat:vertexShader, ntscVertexShaderGlobals, ntscVertexShaderBody];
@@ -295,7 +331,6 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
 
 - (nonnull NSString *)fragmentShaderForType:(CSCathodeRayViewSignalType)type
 {
-
 	NSString *const fragmentShader =
 		@"#version 150\n"
 		"\n"
@@ -396,10 +431,14 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
 	_alphaUniform					= glGetUniformLocation(_shaderProgram, "alpha");
 	_textureSizeUniform				= glGetUniformLocation(_shaderProgram, "textureSize");
 	_windowSizeUniform				= glGetUniformLocation(_shaderProgram, "windowSize");
+	_boundsSizeUniform				= glGetUniformLocation(_shaderProgram, "boundsSize");
+	_boundsOriginUniform			= glGetUniformLocation(_shaderProgram, "boundsOrigin");
 
 	GLint texIDUniform				= glGetUniformLocation(_shaderProgram, "texID");
 	GLint shadowMaskTexIDUniform	= glGetUniformLocation(_shaderProgram, "shadowMaskTexID");
 
+	[self pushSizeUniforms];
+
 	glUniform1i(texIDUniform, 0);
 	glUniform1i(shadowMaskTexIDUniform, 1);
 

OSBindings/Mac/Clock Signal/Wrappers/CSElectron.h

@@ -10,4 +10,7 @@
 
 @interface CSElectron : CSMachine
 
+- (void)setOSROM:(nonnull NSData *)rom;
+- (void)setBASICROM:(nonnull NSData *)rom;
+
 @end

OSBindings/Mac/Clock Signal/Wrappers/CSElectron.mm

@@ -19,4 +19,12 @@
 	_electron.run_for_cycles(numberOfCycles);
 }
 
+- (void)setOSROM:(nonnull NSData *)rom {
+	_electron.set_rom(Electron::ROMTypeOS, rom.length, (const uint8_t *)rom.bytes);
+}
+
+- (void)setBASICROM:(nonnull NSData *)rom {
+	_electron.set_rom(Electron::ROMTypeBASIC, rom.length, (const uint8_t *)rom.bytes);
+}
+
 @end