Apply applicable deferred actions before lookahead.

ClockReceiver/DeferredQueue.hpp

@@ -73,6 +73,11 @@ template <typename TimeUnit> class DeferredQueue {
 			}
 		}
 
+		/// @returns @c true if no actions are enqueued; @c false otherwise.
+		bool empty() const {
+			return pending_actions_.empty();
+		}
+
 	private:
 		// The list of deferred actions.
 		struct DeferredAction {

Machines/Apple/AppleII/AppleII.cpp

@@ -742,6 +742,9 @@ template <Analyser::Static::AppleII::Target::Model model, bool has_mockingboard>
 				// actor, but this will actually be the result most of the time so it's not
 				// too terrible.
 				if(isReadOperation(operation) && address != 0xc000) {
+					if(video_.has_deferred_actions()) {
+						update_video();
+					}
 					*value = video_.get_last_read_value(cycles_since_video_update_);
 				}
 
@@ -851,7 +854,7 @@ template <Analyser::Static::AppleII::Target::Model model, bool has_mockingboard>
 					case 0xc050:
 					case 0xc051:
 						update_video();
-						video_.set_text(!!(address&1));
+						video_.set_text(address&1);
 					break;
 					case 0xc052:	update_video();		video_.set_mixed(false);		break;
 					case 0xc053:	update_video();		video_.set_mixed(true);			break;

Machines/Apple/AppleII/Video.hpp

@@ -10,7 +10,6 @@
 
 #include "../../../Outputs/CRT/CRT.hpp"
 #include "../../../ClockReceiver/ClockReceiver.hpp"
-#include "../../../ClockReceiver/DeferredQueue.hpp"
 
 #include "VideoSwitches.hpp"
 

Machines/Apple/AppleII/VideoSwitches.hpp

@@ -247,6 +247,10 @@ template <typename TimeUnit> class VideoSwitches {
 			}
 		}
 
+		bool has_deferred_actions() const {
+			return !deferrer_.empty();
+		}
+
 	protected:
 		GraphicsMode graphics_mode(int row) const {
 			if(

OSBindings/Mac/Clock Signal.xcodeproj/xcshareddata/xcschemes/Clock Signal.xcscheme

@@ -62,7 +62,7 @@
       </Testables>
    </TestAction>
    <LaunchAction
-      buildConfiguration = "Release"
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       enableASanStackUseAfterReturn = "YES"