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diff --git a/net.mograsim.logic.model.am2900/test/net/mograsim/logic/model/am2900/TestableAm2901.java b/net.mograsim.logic.model.am2900/test/net/mograsim/logic/model/am2900/TestableAm2901.java
new file mode 100644
index 00000000..d898b399
--- /dev/null
+++ b/net.mograsim.logic.model.am2900/test/net/mograsim/logic/model/am2900/TestableAm2901.java
@@ -0,0 +1,131 @@
+package net.mograsim.logic.model.am2900;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Arrays;
+import java.util.stream.Stream;
+
+public interface TestableAm2901
+{
+	void setup();
+
+	Result run();
+
+	void setDest(Am2901_Dest dest);
+
+	void setFunc(Am2901_Func func);
+
+	void setSrc(Am2901_Src src);
+
+	void setReg_A(String val_4_bit);
+
+	void setReg_B(String val_4_bit);
+
+	void setCarryIn(String val_1_bit);
+
+	void setNotOutEnable(String val_1_bit);
+
+	void setD(String val_4_bit);
+
+	void setQ_0(String val_1_bit);
+
+	void setQ_3(String val_1_bit);
+
+	void setRAM_0(String val_1_bit);
+
+	void setRAM_3(String val_1_bit);
+
+	void clockOn(boolean isClockOn);
+
+	void setDirectly(Register r, String val_4_bit);
+
+	String getQ_0();
+
+	String getQ_3();
+
+	String getRAM_0();
+
+	String getRAM_3();
+
+	String getNotP();
+
+	String getNotG();
+
+	String getCarryOut();
+
+	String getSign();
+
+	String getZero();
+
+	String getOverflow();
+
+	String getY();
+
+	String getDirectly(Register r);
+
+	default void assertRunSuccess()
+	{
+		assertEquals(Result.SUCCESS, run());
+	}
+
+	default void assertFullCycleSuccess()
+	{
+		assertRunSuccess();
+		clockOn(false);
+		assertRunSuccess();
+		clockOn(true);
+		assertRunSuccess();
+	}
+
+	public enum Result
+	{
+		SUCCESS, OUT_OF_TIME, ERROR;
+	}
+
+	public enum Am2901_Dest
+	{
+		QREG, NOP, RAMA, RAMF, RAMQD, RAMD, RAMQU, RAMU;
+
+		public boolean doesShift()
+		{
+			return ordinal() >= 4;
+		}
+
+		public int getShiftDir()
+		{
+			return doesShift() ? (ordinal() < 6 ? -1 : 1) : 0;
+		}
+
+		public int getI7()
+		{
+			return this.ordinal() >> 1 & 1;
+		}
+	}
+
+	public enum Am2901_Func
+	{
+		ADD, SUBR, SUBS, OR, AND, NOTRS, EXOR, EXNOR;
+	}
+
+	public enum Am2901_Src
+	{
+		AQ, AB, ZQ, ZB, ZA, DA, DQ, DZ;
+	}
+
+	public enum Register
+	{
+		r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, rA, rB, rC, rD, rE, rF, Q;
+
+		public String toBitString()
+		{
+			if (this.ordinal() > 0xF)
+				throw new UnsupportedOperationException();
+			return TestUtil.to4bitBin(this.ordinal());
+		}
+
+		public static Stream<Register> stream()
+		{
+			return Arrays.stream(values());
+		}
+	}
+}