diff --git a/Machines/Atari2600.cpp b/Machines/Atari2600.cpp
index e1ac8617f..e78f97138 100644
--- a/Machines/Atari2600.cpp
+++ b/Machines/Atari2600.cpp
@@ -136,7 +136,7 @@ void Machine::get_output_pixel(uint8_t *pixel, int offset)
 void Machine::output_pixels(int count)
 {
 	const int32_t start_of_sync = 214;
-	const int32_t end_of_sync = 188;
+	const int32_t end_of_sync = 198;
 
 	_timestamp += count;
 	while(count--)
diff --git a/OSBindings/Mac/Clock Signal/CSCathodeRayView.m b/OSBindings/Mac/Clock Signal/CSCathodeRayView.m
index 764e0949d..9e8274efc 100644
--- a/OSBindings/Mac/Clock Signal/CSCathodeRayView.m	
+++ b/OSBindings/Mac/Clock Signal/CSCathodeRayView.m	
@@ -164,7 +164,7 @@ const char *vertexShader =
 	"void main (void)\n"
 	"{\n"
 		"srcCoordinatesVarying = vec2(srcCoordinates.x / 512.0, (srcCoordinates.y + 0.5) / 512.0);\n"
-		"lateralVarying = lateral * 2.09435310266667 + 0.52359877566668;"
+		"lateralVarying = lateral + 1.0707963267949;\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"
 	"}\n";
 
@@ -180,7 +180,7 @@ const char *fragmentShader =
 	"\n"
 	"void main(void)\n"
 	"{\n"
-		"fragColour = texture(texID, srcCoordinatesVarying) * vec4(1.0, 1.0, 1.0, sin(lateralVarying));\n"
+		"fragColour = texture(texID, srcCoordinatesVarying) * vec4(1.0, 1.0, 1.0, sin(lateralVarying));\n" //
 	"}\n";
 
 #if defined(DEBUG)
diff --git a/Outputs/CRT.cpp b/Outputs/CRT.cpp
index 523cc5c0d..dfbcec031 100644
--- a/Outputs/CRT.cpp
+++ b/Outputs/CRT.cpp
@@ -37,7 +37,7 @@ void CRT::set_new_timing(int cycles_per_line, int height_of_display)
 	_sync_capacitor_charge_threshold = ((syncCapacityLineChargeThreshold * _cycles_per_line) * 50) >> 7;
 	_horizontal_retrace_time = (millisecondsHorizontalRetraceTime * _cycles_per_line) >> 6;
 	const int vertical_retrace_time = scanlinesVerticalRetraceTime * _cycles_per_line;
-	const float halfLineWidth = (float)_height_of_display * 1.0f;
+	const float halfLineWidth = (float)_height_of_display * 1.85f;
 
 	for(int c = 0; c < 4; c++)
 	{