diff --git a/Ghidra/Extensions/SleighDevTools/pcodetest/pcode_defs.py b/Ghidra/Extensions/SleighDevTools/pcodetest/pcode_defs.py
index c8cf6cc787..e061547313 100644
--- a/Ghidra/Extensions/SleighDevTools/pcodetest/pcode_defs.py
+++ b/Ghidra/Extensions/SleighDevTools/pcodetest/pcode_defs.py
@@ -47,6 +47,16 @@ PCodeTest({
     'language_id': 'ARM:LE:32:v7',
 })
 
+PCodeTest({
+    'name': 'ARMv5',
+    'build_all': 1,
+    'build_exe': 1,
+    'qemu_command': 'qemu-arm',
+    'toolchain': 'ARM/arm-eabi',
+    'language_id': 'ARM:LE:32:v5',
+    'ccflags': '-march=armv5 -L %(toolchain_dir)s/lib/gcc/arm-eabi/%(gcc_version)s -lgcc',
+})
+
 PCodeTest({
     'name': 'ARM7',
     'toolchain': 'ARM/arm-eabi',
diff --git a/Ghidra/Processors/ARM/src/main/java/ghidra/program/emulation/ARMEmulateInstructionStateModifier.java b/Ghidra/Processors/ARM/src/main/java/ghidra/program/emulation/ARMEmulateInstructionStateModifier.java
index 6ae2e7d387..f5ce6859d7 100644
--- a/Ghidra/Processors/ARM/src/main/java/ghidra/program/emulation/ARMEmulateInstructionStateModifier.java
+++ b/Ghidra/Processors/ARM/src/main/java/ghidra/program/emulation/ARMEmulateInstructionStateModifier.java
@@ -36,11 +36,11 @@ public class ARMEmulateInstructionStateModifier extends EmulateInstructionStateM
 	public ARMEmulateInstructionStateModifier(Emulate emu) {
 		super(emu);
 		TModeReg = language.getRegister("TMode");
-		TBreg = language.getRegister("ISAModeSwitch");
+		TBreg = language.getRegister("ISAModeSwitch"); // generic register which mirrors TB register value
 		if (TModeReg != null) {
 			if (TBreg == null) {
 				throw new RuntimeException("Expected language " + language.getLanguageID() +
-					" to have TB register defined");
+					" to have ISAModeSwitch register defined");
 			}
 			tMode = new RegisterValue(TModeReg, BigInteger.ONE);
 			aMode = new RegisterValue(TModeReg, BigInteger.ZERO);
@@ -122,14 +122,15 @@ public class ARMEmulateInstructionStateModifier extends EmulateInstructionStateM
 		}
 		BigInteger tModeValue = BigInteger.ZERO;
 		if (contextRegisterValue != null) {
-			tModeValue = contextRegisterValue.getRegisterValue(TModeReg).getUnsignedValueIgnoreMask();
+			tModeValue =
+				contextRegisterValue.getRegisterValue(TModeReg).getUnsignedValueIgnoreMask();
 		}
 		if (!BigInteger.ZERO.equals(tModeValue)) {
 			tModeValue = BigInteger.ONE;
 		}
 		emu.getMemoryState().setValue(TBreg, tModeValue);
 	}
-	
+
 	/**
 	 * Handle odd addresses which may occur when jumping/returning indirectly
 	 * to Thumb mode.  It is assumed that language will properly handle
diff --git a/Ghidra/Processors/ARM/src/test.processors/java/ghidra/test/processors/ARMv5_O0_EmulatorTest.java b/Ghidra/Processors/ARM/src/test.processors/java/ghidra/test/processors/ARMv5_O0_EmulatorTest.java
new file mode 100644
index 0000000000..f5d11b8af4
--- /dev/null
+++ b/Ghidra/Processors/ARM/src/test.processors/java/ghidra/test/processors/ARMv5_O0_EmulatorTest.java
@@ -0,0 +1,40 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ghidra.test.processors;
+
+import ghidra.test.processors.support.ProcessorEmulatorTestAdapter;
+import junit.framework.Test;
+
+public class ARMv5_O0_EmulatorTest extends ProcessorEmulatorTestAdapter {
+
+	private static final String LANGUAGE_ID = "ARM:LE:32:v5";
+	private static final String COMPILER_SPEC_ID = "default";
+
+	private static final String[] REG_DUMP_SET = new String[] {};
+
+	public ARMv5_O0_EmulatorTest(String name) throws Exception {
+		super(name, LANGUAGE_ID, COMPILER_SPEC_ID, REG_DUMP_SET);
+	}
+
+	@Override
+	protected String getProcessorDesignator() {
+		return "ARMv5_GCC_O0";
+	}
+
+	public static Test suite() {
+		return ProcessorEmulatorTestAdapter.buildEmulatorTestSuite(ARM_O0_EmulatorTest.class);
+	}
+}
diff --git a/Ghidra/Processors/ARM/src/test.processors/java/ghidra/test/processors/ARMv5_O3_EmulatorTest.java b/Ghidra/Processors/ARM/src/test.processors/java/ghidra/test/processors/ARMv5_O3_EmulatorTest.java
new file mode 100644
index 0000000000..a4743a0a59
--- /dev/null
+++ b/Ghidra/Processors/ARM/src/test.processors/java/ghidra/test/processors/ARMv5_O3_EmulatorTest.java
@@ -0,0 +1,40 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ghidra.test.processors;
+
+import ghidra.test.processors.support.ProcessorEmulatorTestAdapter;
+import junit.framework.Test;
+
+public class ARMv5_O3_EmulatorTest extends ProcessorEmulatorTestAdapter {
+
+	private static final String LANGUAGE_ID = "ARM:LE:32:v5";
+	private static final String COMPILER_SPEC_ID = "default";
+
+	private static final String[] REG_DUMP_SET = new String[] {};
+
+	public ARMv5_O3_EmulatorTest(String name) throws Exception {
+		super(name, LANGUAGE_ID, COMPILER_SPEC_ID, REG_DUMP_SET);
+	}
+
+	@Override
+	protected String getProcessorDesignator() {
+		return "ARMv5_GCC_O3";
+	}
+
+	public static Test suite() {
+		return ProcessorEmulatorTestAdapter.buildEmulatorTestSuite(ARM_O3_EmulatorTest.class);
+	}
+}