diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
index 19fcbb4c..e231e25e 100644
--- a/source/CMakeLists.txt
+++ b/source/CMakeLists.txt
@@ -63,7 +63,6 @@ add_library(appleii SHARED
   linux/linuxframe.cpp
 
   linux/duplicates/Debug.cpp
-  linux/duplicates/WinVideo.cpp
   linux/duplicates/Joystick.cpp
   linux/duplicates/SerialComms.cpp
   linux/duplicates/PropertySheet.cpp
diff --git a/source/linux/data.h b/source/linux/data.h
index 28584c6b..386d1cfd 100644
--- a/source/linux/data.h
+++ b/source/linux/data.h
@@ -1,5 +1,3 @@
 #pragma once
 
 void CheckCpu();
-
-extern int g_nAltCharSetOffset; // alternate character set
diff --git a/source/linux/duplicates/WinVideo.cpp b/source/linux/duplicates/WinVideo.cpp
deleted file mode 100644
index f40381ec..00000000
--- a/source/linux/duplicates/WinVideo.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#include "StdAfx.h"
-
-#include "Video.h"
-#include "NTSC.h"
-
-void VideoRefreshScreen ( uint32_t uRedrawWholeScreenVideoMode /* =0*/, bool bRedrawWholeScreen /* =false*/ )
-{
-  if (bRedrawWholeScreen)
-  {
-    // uVideoModeForWholeScreen set if:
-    // . MODE_DEBUG   : always
-    // . MODE_RUNNING : called from VideoRedrawScreen(), eg. during full-speed
-    if (bRedrawWholeScreen)
-      NTSC_SetVideoMode(uRedrawWholeScreenVideoMode);
-    NTSC_VideoRedrawWholeScreen();
-  }
-}
diff --git a/source/linux/interface.h b/source/linux/interface.h
index 89dd1dd7..0613d57f 100644
--- a/source/linux/interface.h
+++ b/source/linux/interface.h
@@ -8,28 +8,15 @@
 #include <string>
 
 // Resources
-
 HRSRC FindResource(void *, const char * filename, const char *);
 
 // Bitmap
 HBITMAP LoadBitmap(HINSTANCE hInstance, const char * filename);
 LONG GetBitmapBits(HBITMAP hbit, LONG cb, LPVOID lpvBits);
 
-// Keyboard
-
-BYTE KeybGetKeycode();
-BYTE KeybReadData();
-BYTE KeybReadFlag();
-
-// Joystick
-
-BYTE JoyReadButton(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG uExecutedCycles);
-BYTE JoyReadPosition(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG uExecutedCycles);
-
 // MessageBox
-
 int MessageBox(HWND, const char * text, const char * caption, UINT type);
 
-// Mockingboard
+// Sound
 void registerSoundBuffer(IDirectSoundBuffer * buffer);
 void unregisterSoundBuffer(IDirectSoundBuffer * buffer);
diff --git a/test/TestCPU6502/CMakeLists.txt b/test/TestCPU6502/CMakeLists.txt
index f0267889..898698e1 100644
--- a/test/TestCPU6502/CMakeLists.txt
+++ b/test/TestCPU6502/CMakeLists.txt
@@ -1,5 +1,4 @@
 add_executable(testcpu6502
   stdafx.cpp
   ../../source/SynchronousEventManager.cpp
-  dummy.cpp
   TestCPU6502.cpp)
diff --git a/test/TestCPU6502/dummy.cpp b/test/TestCPU6502/dummy.cpp
deleted file mode 100644
index 0be5c85c..00000000
--- a/test/TestCPU6502/dummy.cpp
+++ /dev/null
@@ -1,43 +0,0 @@
-#include "linux/interface.h"
-
-void registerSoundBuffer(IDirectSoundBuffer * buffer)
-{
-}
-
-void unregisterSoundBuffer(IDirectSoundBuffer * buffer)
-{
-}
-
-// Resources
-
-HRSRC FindResource(void *, const char * filename, const char *)
-{
-  return HRSRC();
-}
-
-// Keyboard
-
-BYTE KeybGetKeycode() { return 0; }
-BYTE KeybReadData() { return 0; }
-BYTE KeybReadFlag() { return 0; }
-
-// Joystick
-
-BYTE JoyReadButton(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft) { return 0; }
-BYTE JoyReadPosition(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft) { return 0; }
-
-// MessageBox
-
-int MessageBox(HWND, const char * text, const char * caption, UINT type) { return 0; }
-
-// Bitmap
-
-HBITMAP LoadBitmap(HINSTANCE hInstance, const char * filename)
-{
-  return nullptr;
-}
-
-LONG GetBitmapBits(HBITMAP hbit, LONG cb, LPVOID lpvBits)
-{
-  return 0;
-}