diff --git a/src/CxbxKrnl/EmuD3D8.cpp b/src/CxbxKrnl/EmuD3D8.cpp
index a2f7552a6..8d825c428 100644
--- a/src/CxbxKrnl/EmuD3D8.cpp
+++ b/src/CxbxKrnl/EmuD3D8.cpp
@@ -9905,13 +9905,13 @@ HRESULT WINAPI XTL::EMUPATCH(D3DDevice_PersistDisplay)()
 
 
 // ******************************************************************
-// * patch: D3DDevice_Unknown1
+// * patch: D3D_CMiniport_GetDisplayCapabilities
 // ******************************************************************
-void WINAPI XTL::EMUPATCH(D3DDevice_Unknown1)()
+void WINAPI XTL::EMUPATCH(D3D_CMiniport_GetDisplayCapabilities)()
 {
 	FUNC_EXPORTS
 
-	DbgPrintf("EmuD3D8: EmuD3DDevice_Unknown1()\n");
+	DbgPrintf("EmuD3D8: EmuD3D_CMiniport_GetDisplayCapabilities()\n");
 
 	// TODO: Find out what this actually is.
 	// This function was only found in Run Like Hell (5233) @ 0x11FCD0.
diff --git a/src/CxbxKrnl/EmuD3D8.h b/src/CxbxKrnl/EmuD3D8.h
index 04ae8db2d..77a45b2bb 100644
--- a/src/CxbxKrnl/EmuD3D8.h
+++ b/src/CxbxKrnl/EmuD3D8.h
@@ -1754,9 +1754,9 @@ HRESULT WINAPI EMUPATCH(D3DDevice_GetPersistedSurface)(X_D3DSurface **ppSurface)
 X_D3DSurface* WINAPI EMUPATCH(D3DDevice_GetPersistedSurface2)();
 
 // ******************************************************************
-// * patch: D3DDevice_Unknown1
+// * patch: D3D_CMiniport_GetDisplayCapabilities
 // ******************************************************************
-void WINAPI EMUPATCH(D3DDevice_Unknown1)();
+void WINAPI EMUPATCH(D3D_CMiniport_GetDisplayCapabilities)();
 
 // ******************************************************************
 // * patch: D3DDevice_PrimeVertexCache
diff --git a/src/CxbxKrnl/HLEDataBase/D3D8.1.0.5233.inl b/src/CxbxKrnl/HLEDataBase/D3D8.1.0.5233.inl
index c0afd03e0..0c41b4990 100644
--- a/src/CxbxKrnl/HLEDataBase/D3D8.1.0.5233.inl
+++ b/src/CxbxKrnl/HLEDataBase/D3D8.1.0.5233.inl
@@ -551,22 +551,29 @@ OOVPA_NO_XREF(D3DDevice_SetSoftDisplayFilter, 5233, 12)
 OOVPA_END;
 
 // ******************************************************************
-// * D3DDevice_Unknown1
+// * D3D_CMiniport_GetDisplayCapabilities
 // ******************************************************************
-OOVPA_NO_XREF(D3DDevice_Unknown1, 5233, 9)
+OOVPA_NO_XREF(D3D_CMiniport_GetDisplayCapabilities, 5233, 10)
 
-	// D3DDevice_Unknown1+0x00 : xor eax, eax
-	{ 0x00, 0x33 },
-	{ 0x01, 0xC0 },
-	// D3DDevice_Unknown1+0x13 : call ds:AvSendTVEncoderOption
-	{ 0x13, 0xFF },
-	{ 0x14, 0x15 },
-	{ 0x15, 0x08 },
-	{ 0x16, 0x94 },
-	{ 0x17, 0x19 },
-	{ 0x18, 0x00 },
-	// D3DDevice_Unknown1+0x1E : retn
-	{ 0x1E, 0xC3 },
+        // D3D_CMiniport_GetDisplayCapabilities+0x00 : xor eax, eax
+        { 0x00, 0x33 }, // (Offset,Value)-Pair #1
+        { 0x01, 0xC0 }, // (Offset,Value)-Pair #2
+
+        // D3D_CMiniport_GetDisplayCapabilities+0x02 : cmp ds:_D3D__AvInfo, eax
+        { 0x02, 0x39 }, // (Offset,Value)-Pair #3
+        { 0x03, 0x05 }, // (Offset,Value)-Pair #4
+
+        // D3D_CMiniport_GetDisplayCapabilities+0x10 : push 6, push eax
+        { 0x10, 0x6A }, // (Offset,Value)-Pair #5
+        { 0x11, 0x06 }, // (Offset,Value)-Pair #6
+        { 0x12, 0x50 }, // (Offset,Value)-Pair #7
+
+        // D3D_CMiniport_GetDisplayCapabilities+0x13 : call ds:AvSendTVEncoderOption
+        { 0x13, 0xFF }, // (Offset,Value)-Pair #8
+        { 0x14, 0x15 }, // (Offset,Value)-Pair #9
+
+        // D3D_CMiniport_GetDisplayCapabilities+0x1E : retn
+        { 0x1E, 0xC3 }, // (Offset,Value)-Pair #10
 OOVPA_END;
 
 // ******************************************************************
@@ -742,7 +749,7 @@ OOVPATable D3D8_5233[] = {
 	REGISTER_OOVPA(D3DDevice_GetCreationParameters, 4034, PATCH),
 	REGISTER_OOVPA(D3DDevice_SetFlickerFilter, 5233, PATCH),
 	REGISTER_OOVPA(D3DDevice_SetSoftDisplayFilter, 5233, PATCH),
-	// REGISTER_OOVPA(D3DDevice_Unknown1, 5233, PATCH)
+	REGISTER_OOVPA(D3D_CMiniport_GetDisplayCapabilities, 5233, PATCH),
 	REGISTER_OOVPA(D3DDevice_SetRenderState_TwoSidedLighting, 4134, PATCH), // Beware of the typo...
 	REGISTER_OOVPA(D3DDevice_SetRenderState_FrontFace, 4134, PATCH),
 	REGISTER_OOVPA(D3DDevice_SetRenderState_LogicOp, 4627, PATCH),