diff --git a/source/APPLE.C b/source/apple.c
similarity index 96%
rename from source/APPLE.C
rename to source/apple.c
index 665f06e..db9f422 100644
--- a/source/APPLE.C
+++ b/source/apple.c
@@ -8,8 +8,8 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
-#include "Opcodes.h"
+#include "emu48.h"
+#include "opcodes.h"
 #include "apple.h"
 #include "io.h"								// I/O register definitions
 #include "i28f160.h"
@@ -18,7 +18,7 @@
 
 #pragma intrinsic(memset,memcpy)
 
-#include "Ops.h"
+#include "ops.h"
 
 //
 // ROM buffer access functions
diff --git a/source/APPLE.H b/source/apple.h
similarity index 100%
rename from source/APPLE.H
rename to source/apple.h
diff --git a/source/COLOR.H b/source/color.h
similarity index 100%
rename from source/COLOR.H
rename to source/color.h
diff --git a/source/CURSOR.C b/source/cursor.c
similarity index 97%
rename from source/CURSOR.C
rename to source/cursor.c
index 2e80a3a..e2a010d 100644
--- a/source/CURSOR.C
+++ b/source/cursor.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 
 // hand cursor AND mask
 static CONST BYTE ANDmaskCursor[] =
diff --git a/source/DDESERV.C b/source/ddeserv.c
similarity index 96%
rename from source/DDESERV.C
rename to source/ddeserv.c
index 3d219b4..afc6cd2 100644
--- a/source/DDESERV.C
+++ b/source/ddeserv.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"
 
 HDDEDATA CALLBACK DdeCallback(UINT iType,UINT iFmt,HCONV hConv,
diff --git a/source/DEBUGDLL.C b/source/debugdll.c
similarity index 96%
rename from source/DEBUGDLL.C
rename to source/debugdll.c
index 2f7c8a4..9aa83b6 100644
--- a/source/DEBUGDLL.C
+++ b/source/debugdll.c
@@ -8,12 +8,12 @@
  */
 #include "pch.h"
 #include "resource.h"
-#include "Emu48.h"
-#include "Opcodes.h"
+#include "emu48.h"
+#include "opcodes.h"
 #include "ops.h"
 #include "debugger.h"
 
-#include "Emu48Dll.h"
+#include "emu48dll.h"
 
 #define MAXBREAKPOINTS  256					// max. number of breakpoints
 
diff --git a/source/DEBUGGER.C b/source/debugger.c
similarity index 96%
rename from source/DEBUGGER.C
rename to source/debugger.c
index 67218f3..9960fd6 100644
--- a/source/DEBUGGER.C
+++ b/source/debugger.c
@@ -8,8 +8,8 @@
  */
 #include "pch.h"
 #include "resource.h"
-#include "Emu48.h"
-#include "Opcodes.h"
+#include "emu48.h"
+#include "opcodes.h"
 #include "ops.h"
 #include "color.h"
 #include "disrpl.h"
diff --git a/source/DEBUGGER.H b/source/debugger.h
similarity index 100%
rename from source/DEBUGGER.H
rename to source/debugger.h
diff --git a/source/DISASM.C b/source/disasm.c
similarity index 95%
rename from source/DISASM.C
rename to source/disasm.c
index f5cbe55..a407160 100644
--- a/source/DISASM.C
+++ b/source/disasm.c
@@ -8,7 +8,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 
 #pragma inline_depth(0)
 
diff --git a/source/DISMEM.C b/source/dismem.c
similarity index 95%
rename from source/DISMEM.C
rename to source/dismem.c
index 6cda3e6..0e80216 100644
--- a/source/DISMEM.C
+++ b/source/dismem.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 
 typedef struct								// type of model memory mapping
 {
diff --git a/source/DISPLAY.C b/source/display.c
similarity index 96%
rename from source/DISPLAY.C
rename to source/display.c
index 2c1bffe..60c17b0 100644
--- a/source/DISPLAY.C
+++ b/source/display.c
@@ -9,7 +9,7 @@
  */
 #include "pch.h"
 #include "resource.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"
 #include "kml.h"
 
diff --git a/source/DISRPL.C b/source/disrpl.c
similarity index 95%
rename from source/DISRPL.C
rename to source/disrpl.c
index 494eae8..4525421 100644
--- a/source/DISRPL.C
+++ b/source/disrpl.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "disrpl.h"
 
 DWORD dwRplPlatform = RPL_P3;				// current RPL platform
diff --git a/source/DISRPL.H b/source/disrpl.h
similarity index 100%
rename from source/DISRPL.H
rename to source/disrpl.h
diff --git a/source/EMU48.C b/source/emu48.c
similarity index 96%
rename from source/EMU48.C
rename to source/emu48.c
index fe045f6..98287b0 100644
--- a/source/EMU48.C
+++ b/source/emu48.c
@@ -8,7 +8,7 @@
  */
 #include "pch.h"
 #include "resource.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"
 #include "kml.h"
 #include "debugger.h"
@@ -1751,7 +1751,7 @@ static LRESULT OnToolDisasm(VOID)			// disasm dialogbox call
 
 static LRESULT OnTopics(VOID)
 {
-	ShellExecute(hWnd,_T("open"),_T("Emu48.htm"),NULL,szEmuDirectory,SW_SHOWNORMAL);
+	ShellExecute(hWnd,_T("open"),_T("emu48.htm"),NULL,szEmuDirectory,SW_SHOWNORMAL);
 	return 0;
 }
 
diff --git a/source/EMU48.H b/source/emu48.h
similarity index 97%
rename from source/EMU48.H
rename to source/emu48.h
index 26eb81e..3c07eae 100644
--- a/source/EMU48.H
+++ b/source/emu48.h
@@ -1,5 +1,5 @@
 /*
- *   Emu48.h
+ *   emu48.h
  *
  *   This file is part of Emu48
  *
diff --git a/source/EMU48DLL.C b/source/emu48dll.c
similarity index 96%
rename from source/EMU48DLL.C
rename to source/emu48dll.c
index ac2edb4..782d522 100644
--- a/source/EMU48DLL.C
+++ b/source/emu48dll.c
@@ -9,12 +9,12 @@
 
 #include "pch.h"
 #include "resource.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"
 #include "kml.h"
 #include "debugger.h"
 
-#include "Emu48Dll.h"
+#include "emu48dll.h"
 
 static LPCTSTR pArgv[3];					// command line memory
 static ATOM    classAtom = INVALID_ATOM;	// window class atom
diff --git a/source/EMU48DLL.H b/source/emu48dll.h
similarity index 96%
rename from source/EMU48DLL.H
rename to source/emu48dll.h
index 6baa01a..6023581 100644
--- a/source/EMU48DLL.H
+++ b/source/emu48dll.h
@@ -1,5 +1,5 @@
 /*
- *   Emu48Dll.h
+ *   emu48dll.h
  *
  *   This file is part of Emu48
  *
diff --git a/source/ENGINE.C b/source/engine.c
similarity index 96%
rename from source/ENGINE.C
rename to source/engine.c
index e905793..0e41303 100644
--- a/source/ENGINE.C
+++ b/source/engine.c
@@ -7,8 +7,8 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
-#include "Opcodes.h"
+#include "emu48.h"
+#include "opcodes.h"
 #include "io.h"
 #include "debugger.h"
 
@@ -72,7 +72,7 @@ static DWORD dwOldCyc;						// cpu cycles at last event
 static DWORD dwSpeedRef;					// timer value at last event
 static DWORD dwTickRef;						// sample timer ticks
 
-#include "Ops.h"
+#include "ops.h"
 
 // save last instruction in circular instruction buffer
 static __inline VOID SaveInstrAddr(DWORD dwAddr)
diff --git a/source/EXTERNAL.C b/source/external.c
similarity index 95%
rename from source/EXTERNAL.C
rename to source/external.c
index a4b8ec8..2039fdd 100644
--- a/source/EXTERNAL.C
+++ b/source/external.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "ops.h"
 
 #define SAMPLES_PER_SEC		44100			// sound sampling rate
diff --git a/source/FETCH.C b/source/fetch.c
similarity index 95%
rename from source/FETCH.C
rename to source/fetch.c
index e19cdf8..66c4c90 100644
--- a/source/FETCH.C
+++ b/source/fetch.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Opcodes.h"
+#include "opcodes.h"
 
 #define F	0xFF							// F = function
 
diff --git a/source/FILES.C b/source/files.c
similarity index 96%
rename from source/FILES.C
rename to source/files.c
index d7c2e5b..a38cef7 100644
--- a/source/FILES.C
+++ b/source/files.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "ops.h"
 #include "io.h"								// I/O register definitions
 #include "kml.h"
diff --git a/source/I28F160.C b/source/i28f160.c
similarity index 96%
rename from source/I28F160.C
rename to source/i28f160.c
index b7175c9..e3d9f81 100644
--- a/source/I28F160.C
+++ b/source/i28f160.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "i28f160.h"
 
 #define ARRAYSIZEOF(a)	(sizeof(a) / sizeof(a[0]))
diff --git a/source/I28F160.H b/source/i28f160.h
similarity index 100%
rename from source/I28F160.H
rename to source/i28f160.h
diff --git a/source/IO.H b/source/io.h
similarity index 100%
rename from source/IO.H
rename to source/io.h
diff --git a/source/KEYBOARD.C b/source/keyboard.c
similarity index 96%
rename from source/KEYBOARD.C
rename to source/keyboard.c
index 9072982..fa21f1d 100644
--- a/source/KEYBOARD.C
+++ b/source/keyboard.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"								// I/O definitions
 
 DWORD dwKeyMinDelay = 50;					// minimum time for key hold
diff --git a/source/KEYMACRO.C b/source/keymacro.c
similarity index 95%
rename from source/KEYMACRO.C
rename to source/keymacro.c
index 9d4d930..dfa5df1 100644
--- a/source/KEYMACRO.C
+++ b/source/keymacro.c
@@ -8,7 +8,7 @@
  */
 #include "pch.h"
 #include "resource.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "kml.h"
 
 #define KEYMACROHEAD "Emu-KeyMacro"			// macro signature
diff --git a/source/KML.C b/source/kml.c
similarity index 95%
rename from source/KML.C
rename to source/kml.c
index 7e3ebbe..fb311c2 100644
--- a/source/KML.C
+++ b/source/kml.c
@@ -8,7 +8,7 @@
  */
 #include "pch.h"
 #include "resource.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "kml.h"
 
 static VOID      InitLex(LPCTSTR szScript);
diff --git a/source/KML.H b/source/kml.h
similarity index 100%
rename from source/KML.H
rename to source/kml.h
diff --git a/source/LODEPNG.C b/source/lodepng.c
similarity index 100%
rename from source/LODEPNG.C
rename to source/lodepng.c
diff --git a/source/LODEPNG.H b/source/lodepng.h
similarity index 100%
rename from source/LODEPNG.H
rename to source/lodepng.h
diff --git a/source/LOWBAT.C b/source/lowbat.c
similarity index 95%
rename from source/LOWBAT.C
rename to source/lowbat.c
index adfc75d..6a3a5a2 100644
--- a/source/LOWBAT.C
+++ b/source/lowbat.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"								// I/O definitions
 
 // #define BAT_SIMULATION					// switch low bat simulation
diff --git a/source/MOPS.C b/source/mops.c
similarity index 96%
rename from source/MOPS.C
rename to source/mops.c
index dfbb2e0..2fa0533 100644
--- a/source/MOPS.C
+++ b/source/mops.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "ops.h"
 #include "opcodes.h"
 #include "io.h"
diff --git a/source/MRU.C b/source/mru.c
similarity index 95%
rename from source/MRU.C
rename to source/mru.c
index a72e4a9..bff3f0f 100644
--- a/source/MRU.C
+++ b/source/mru.c
@@ -8,7 +8,7 @@
  */
 #include "pch.h"
 #include "resource.h"
-#include "Emu48.h"
+#include "emu48.h"
 
 static TCHAR  szOriginal[MAX_PATH] = _T("");
 
diff --git a/source/OPCODES.C b/source/opcodes.c
similarity index 94%
rename from source/OPCODES.C
rename to source/opcodes.c
index 81a4ecd..f6e2580 100644
--- a/source/OPCODES.C
+++ b/source/opcodes.c
@@ -8,8 +8,8 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
-#include "Opcodes.h"
+#include "emu48.h"
+#include "opcodes.h"
 #include "apple.h"
 #include "io.h"								// I/O register definitions
 
@@ -25,7 +25,7 @@
 
 #pragma intrinsic(memset,memcpy)
 
-#include "Ops.h"
+#include "ops.h"
 
 // Fields start and length
 UINT F_s[16] = {0/*P*/,0,2,0,15,3,0,0,0,0,0,0,0,0,0,0};
diff --git a/source/OPCODES.H b/source/opcodes.h
similarity index 100%
rename from source/OPCODES.H
rename to source/opcodes.h
diff --git a/source/OPS.H b/source/ops.h
similarity index 100%
rename from source/OPS.H
rename to source/ops.h
diff --git a/source/PCH.C b/source/pch.c
similarity index 100%
rename from source/PCH.C
rename to source/pch.c
diff --git a/source/PCH.H b/source/pch.h
similarity index 100%
rename from source/PCH.H
rename to source/pch.h
diff --git a/source/PNGCRC.C b/source/pngcrc.c
similarity index 100%
rename from source/PNGCRC.C
rename to source/pngcrc.c
diff --git a/source/REDEYE.C b/source/redeye.c
similarity index 95%
rename from source/REDEYE.C
rename to source/redeye.c
index 2c47163..eccff1c 100644
--- a/source/REDEYE.C
+++ b/source/redeye.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"
 
 #define ERR_CHAR	127						// character for transfer error
diff --git a/source/RESOURCE.H b/source/resource.h
similarity index 100%
rename from source/RESOURCE.H
rename to source/resource.h
diff --git a/source/ROMCRC.C b/source/romcrc.c
similarity index 95%
rename from source/ROMCRC.C
rename to source/romcrc.c
index 392c0dd..dd156d5 100644
--- a/source/ROMCRC.C
+++ b/source/romcrc.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "ops.h"
 
 // flash page types
diff --git a/source/RPL.C b/source/rpl.c
similarity index 96%
rename from source/RPL.C
rename to source/rpl.c
index 2f90efe..726578b 100644
--- a/source/RPL.C
+++ b/source/rpl.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "ops.h"
 #include "io.h"
 
diff --git a/source/SERIAL.C b/source/serial.c
similarity index 96%
rename from source/SERIAL.C
rename to source/serial.c
index 0433a06..3e15184 100644
--- a/source/SERIAL.C
+++ b/source/serial.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"
 
 #define INTERRUPT ((void)(Chipset.SoftInt=TRUE,bInterrupt=TRUE))
diff --git a/source/SETTINGS.C b/source/settings.c
similarity index 96%
rename from source/SETTINGS.C
rename to source/settings.c
index 6d5d539..0c8f1c3 100644
--- a/source/SETTINGS.C
+++ b/source/settings.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "i28f160.h"
 
 // #define REGISTRY							// use registry instead of *.ini file
diff --git a/source/SNDDEF.H b/source/snddef.h
similarity index 100%
rename from source/SNDDEF.H
rename to source/snddef.h
diff --git a/source/SNDENUM.C b/source/sndenum.c
similarity index 96%
rename from source/SNDENUM.C
rename to source/sndenum.c
index eb9adda..aa05df3 100644
--- a/source/SNDENUM.C
+++ b/source/sndenum.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "snddef.h"
 
 typedef HRESULT (WINAPI *LPFNDLLGETCLASSOBJECT)(REFCLSID,REFIID,LPVOID *);
diff --git a/source/SOUND.C b/source/sound.c
similarity index 96%
rename from source/SOUND.C
rename to source/sound.c
index 7976cfd..cc2c5f2 100644
--- a/source/SOUND.C
+++ b/source/sound.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 
 // #define DEBUG_SOUND						// switch for sound debug purpose
 // #define SINE_APPROX						// sine signal approximation
diff --git a/source/STACK.C b/source/stack.c
similarity index 95%
rename from source/STACK.C
rename to source/stack.c
index 570dcbc..b060251 100644
--- a/source/STACK.C
+++ b/source/stack.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "io.h"
 
 #define fnRadix		51						// fraction mark
diff --git a/source/SYMBFILE.C b/source/symbfile.c
similarity index 95%
rename from source/SYMBFILE.C
rename to source/symbfile.c
index 16e7658..df2d9ca 100644
--- a/source/SYMBFILE.C
+++ b/source/symbfile.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 
 //################
 //#
diff --git a/source/TIMER.C b/source/timer.c
similarity index 96%
rename from source/TIMER.C
rename to source/timer.c
index 15cf9c5..cd01424 100644
--- a/source/TIMER.C
+++ b/source/timer.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 #include "ops.h"
 #include "io.h"								// I/O definitions
 
diff --git a/source/TYPES.H b/source/types.h
similarity index 100%
rename from source/TYPES.H
rename to source/types.h
diff --git a/source/UDP.C b/source/udp.c
similarity index 94%
rename from source/UDP.C
rename to source/udp.c
index 7e20930..d7fa06c 100644
--- a/source/UDP.C
+++ b/source/udp.c
@@ -7,7 +7,7 @@
  *
  */
 #include "pch.h"
-#include "Emu48.h"
+#include "emu48.h"
 
 TCHAR szUdpServer[1024] = _T("localhost");
 WORD  wUdpPort = 5025;						// scpi-raw