diff --git a/Machines/Atari2600/Atari2600.cpp b/Machines/Atari2600/Atari2600.cpp
index d88da666b..3ea6d2703 100644
--- a/Machines/Atari2600/Atari2600.cpp
+++ b/Machines/Atari2600/Atari2600.cpp
@@ -217,7 +217,7 @@ void Machine::output_pixels(unsigned int count)
 	{
 		OutputState state;
 
-		// determine which output will start in four cycles
+		// determine which output state will be active in four cycles from now
 		switch(_horizontalTimer >> 2)
 		{
 			case 56: case 0: case 1: case 2:				state = OutputState::Blank;											break;
@@ -235,6 +235,11 @@ void Machine::output_pixels(unsigned int count)
 			state = (state = OutputState::Sync) ? OutputState::Blank : OutputState::Sync;
 		}
 
+		// honour the vertical blank flag
+		if(_vBlankEnabled && state == OutputState::Pixel) {
+			state = OutputState::Blank;
+		}
+
 		// write that state as the one that will become effective in four clocks
 		_upcomingEvents[(_upcomingEventsPointer+4)%number_of_upcoming_events].state = state;
 
@@ -352,13 +357,6 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
 
 	output_pixels(cycles_run_for * 3);
 
-//	if(_hMoveWillCount) {
-//		_hMoveCounter = 0x0f;
-//		_hMoveFlags = 0x1f;
-//		_hMoveIsCounting = true;
-//		_hMoveWillCount = false;
-//	}
-
 	if(operation != CPU6502::BusOperation::Ready) {
 
 		// check for a paging access