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diff --git a/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUImux4_12.java b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUImux4_12.java
new file mode 100644
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+++ b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUImux4_12.java
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+package net.mograsim.logic.model.am2900.components;
+
+import java.util.Map;
+
+import net.mograsim.logic.core.types.Bit;
+import net.mograsim.logic.core.types.BitVector;
+
+import static net.mograsim.logic.core.types.Bit.*;
+import net.mograsim.logic.core.wires.Wire.ReadEnd;
+import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
+import net.mograsim.logic.model.model.ViewModelModifiable;
+import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedGUIComponent;
+import net.mograsim.logic.model.model.wires.Pin;
+import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
+
+public class GUImux4_12 extends SimpleRectangularHardcodedGUIComponent
+{
+	public GUImux4_12(ViewModelModifiable model, String name)
+	{
+		super(model, name, "4-way MUX\n12 bit");
+		setSize(80, 40);
+		addPin(new Pin(this, "SA", 1, 0, 5), Usage.INPUT, Position.RIGHT);
+		addPin(new Pin(this, "SB", 1, 0, 15), Usage.INPUT, Position.RIGHT);
+		addPin(new Pin(this, "SC", 1, 0, 25), Usage.INPUT, Position.RIGHT);
+		addPin(new Pin(this, "SD", 1, 0, 35), Usage.INPUT, Position.RIGHT);
+		addPin(new Pin(this, "A", 12, 10, 0), Usage.INPUT, Position.BOTTOM);
+		addPin(new Pin(this, "B", 12, 30, 0), Usage.INPUT, Position.BOTTOM);
+		addPin(new Pin(this, "C", 12, 50, 0), Usage.INPUT, Position.BOTTOM);
+		addPin(new Pin(this, "D", 12, 70, 0), Usage.INPUT, Position.BOTTOM);
+		addPin(new Pin(this, "Y", 12, 40, 40), Usage.OUTPUT, Position.TOP);
+	}
+
+	@Override
+	protected Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
+	{
+		Bit SAVal = readEnds.get("SA").getValue();
+		Bit SBVal = readEnds.get("SB").getValue();
+		Bit SCVal = readEnds.get("SC").getValue();
+		Bit SDVal = readEnds.get("SD").getValue();
+		BitVector YVal;
+		if (SAVal == X || SBVal == X || SCVal == X || SDVal == X)
+			YVal = BitVector.of(X, 12);
+		else if (SAVal == U || SBVal == U || SCVal == U || SDVal == U)
+			YVal = BitVector.of(U, 12);
+		else if (SAVal == Z || SBVal == Z || SCVal == Z || SDVal == Z)
+			YVal = BitVector.of(X, 12);
+		else
+		{
+			YVal = null;
+			if (SAVal == ONE)
+				YVal = readEnds.get("A").getValues();
+			if (SBVal == ONE)
+				if (YVal != null)
+					YVal = BitVector.of(X, 12);
+				else
+					YVal = readEnds.get("B").getValues();
+			if (SCVal == ONE)
+				if (YVal != null)
+					YVal = BitVector.of(X, 12);
+				else
+					YVal = readEnds.get("C").getValues();
+			if (SDVal == ONE)
+				if (YVal != null)
+					YVal = BitVector.of(X, 12);
+				else
+					YVal = readEnds.get("D").getValues();
+			if (YVal == null)
+				YVal = BitVector.of(ZERO, 12);
+		}
+
+		readWriteEnds.get("Y").feedSignals(YVal);
+		return null;
+	}
+}
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