diff --git a/src/video_core/pica.h b/src/video_core/pica.h
new file mode 100644
index 000000000..dab861408
--- /dev/null
+++ b/src/video_core/pica.h
@@ -0,0 +1,35 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+
+namespace Pica {
+
+enum class CommandId : u32
+{
+    ViewportSizeX            =  0x41,
+    ViewportInvSizeX         =  0x42,
+    ViewportSizeY            =  0x43,
+    ViewportInvSizeY         =  0x44,
+    ViewportCorner           =  0x68,
+    DepthBufferFormat        = 0x116,
+    ColorBufferFormat        = 0x117,
+    DepthBufferAddress       = 0x11C,
+    ColorBufferAddress       = 0x11D,
+    ColorBufferSize          = 0x11E,
+};
+
+union CommandHeader {
+    u32 hex;
+
+    BitField< 0, 16, CommandId> cmd_id;
+    BitField<16,  4, u32> parameter_mask;
+    BitField<20, 11, u32> extra_data_length;
+    BitField<31,  1, u32> group_commands;
+};
+
+}
diff --git a/src/video_core/video_core.vcxproj b/src/video_core/video_core.vcxproj
index a4df92386..d77be2bef 100644
--- a/src/video_core/video_core.vcxproj
+++ b/src/video_core/video_core.vcxproj
@@ -25,6 +25,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="gpu_debugger.h" />
+    <ClInclude Include="pica.h" />
     <ClInclude Include="renderer_base.h" />
     <ClInclude Include="utils.h" />
     <ClInclude Include="video_core.h" />
diff --git a/src/video_core/video_core.vcxproj.filters b/src/video_core/video_core.vcxproj.filters
index cc173a718..b89ac1ac4 100644
--- a/src/video_core/video_core.vcxproj.filters
+++ b/src/video_core/video_core.vcxproj.filters
@@ -17,6 +17,7 @@
       <Filter>renderer_opengl</Filter>
     </ClInclude>
     <ClInclude Include="gpu_debugger.h" />
+    <ClInclude Include="pica.h" />
     <ClInclude Include="renderer_base.h" />
     <ClInclude Include="utils.h" />
     <ClInclude Include="video_core.h" />