--- /dev/null
+package net.mograsim.logic.core.components;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import net.mograsim.logic.core.LogicObservable;
+import net.mograsim.logic.core.LogicObserver;
+import net.mograsim.logic.core.timeline.Timeline;
+import net.mograsim.logic.core.timeline.TimelineEventHandler;
+import net.mograsim.logic.core.types.Bit;
+import net.mograsim.logic.core.types.BitVector;
+import net.mograsim.logic.core.wires.CoreWire.ReadEnd;
+import net.mograsim.logic.core.wires.CoreWire.ReadWriteEnd;
+
+public class CoreBitDisplay extends BasicCoreComponent implements LogicObservable
+{
+ private Collection<LogicObserver> observers;
+ private final ReadEnd in;
+ private BitVector displayedValue;
+
+ public CoreBitDisplay(Timeline timeline, ReadEnd in)
+ {
+ super(timeline, 1);
+ observers = new ArrayList<>();
+ this.in = in;
+ in.registerObserver(this);
+ compute();
+ }
+
+ @Override
+ protected TimelineEventHandler compute()
+ {
+ BitVector newValues = in.getValues();
+ return e ->
+ {
+ displayedValue = newValues;
+ notifyObservers();
+ };
+ }
+
+ public BitVector getDisplayedValue()
+ {
+ return displayedValue;
+ }
+
+ public boolean isDisplaying(Bit... values)
+ {
+ return displayedValue.equals(BitVector.of(values));
+ }
+
+ @Override
+ public List<ReadEnd> getAllInputs()
+ {
+ return List.of(in);
+ }
+
+ @Override
+ public List<ReadWriteEnd> getAllOutputs()
+ {
+ return List.of();
+ }
+
+ @Override
+ public void registerObserver(LogicObserver ob)
+ {
+ observers.add(ob);
+ }
+
+ @Override
+ public void deregisterObserver(LogicObserver ob)
+ {
+ observers.remove(ob);
+ }
+
+ @Override
+ public void notifyObservers()
+ {
+ observers.forEach(ob -> ob.update(this));
+ }
+}