diff --git a/help/CommandLine.html b/help/CommandLine.html
index 11690af9..7d717040 100644
--- a/help/CommandLine.html
+++ b/help/CommandLine.html
@@ -11,6 +11,8 @@
 		<p style="FONT-WEIGHT: bold">AppleWin can be driven from the command line as 
 			follows:
 		</p>
+		-conf &lt;pathname&gt;<br>
+		Use an INI file for configuration instead of the Registry.<br>
 		-d1 &lt;pathname&gt;<br>
 		Start with a floppy disk in slot 6 drive-1 (and auto power-on the Apple II).<br>
 		NB. -s6d1 has the meaning same as -d1.<br><br>
diff --git a/source/Applewin.cpp b/source/Applewin.cpp
index 480d72ef..38ef251c 100644
--- a/source/Applewin.cpp
+++ b/source/Applewin.cpp
@@ -85,6 +85,8 @@ static bool g_bSysClkOK = false;
 std::string g_sProgramDir; // Directory of where AppleWin executable resides
 std::string g_sDebugDir; // TODO: Not currently used
 std::string g_sScreenShotDir; // TODO: Not currently used
+std::string g_sConfigFile; // INI file to use instead of Registry
+
 bool      g_bCapturePrintScreenKey = true;
 static bool g_bHookSystemKey = true;
 static bool g_bHookAltTab = false;
@@ -1386,6 +1388,17 @@ static bool ProcessCmdLine(LPSTR lpCmdLine)
 		{
 			g_bRegisterFileTypes = false;
 		}
+		else if (strcmp(lpCmdLine, "-conf") == 0)
+		{
+			lpCmdLine = GetCurrArg(lpNextArg);
+			lpNextArg = GetNextArg(lpNextArg);
+			char buf[MAX_PATH];
+			DWORD res = GetFullPathName(lpCmdLine, MAX_PATH, buf, NULL);
+			if (res == 0)
+				LogFileOutput("Failed to open configuration file: %s\n", lpCmdLine);
+			else
+				g_sConfigFile = buf;
+		}
 		else if (strcmp(lpCmdLine, "-d1") == 0)
 		{
 			lpCmdLine = GetCurrArg(lpNextArg);
diff --git a/source/Registry.cpp b/source/Registry.cpp
index 6ab3ad34..74835f60 100644
--- a/source/Registry.cpp
+++ b/source/Registry.cpp
@@ -28,10 +28,30 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 #include "StdAfx.h"
 
+extern std::string g_sConfigFile;
+
+namespace _ini {
+	//===========================================================================
+	BOOL RegLoadString(LPCTSTR section, LPCTSTR key, BOOL peruser, LPTSTR buffer, DWORD chars)
+	{
+		DWORD n = GetPrivateProfileString(section, key, NULL, buffer, chars, g_sConfigFile.c_str());
+		return n > 0;
+	}
+
+	//===========================================================================
+	void RegSaveString(LPCTSTR section, LPCTSTR key, BOOL peruser, const std::string& buffer)
+	{
+		BOOL updated = WritePrivateProfileString(section, key, buffer.c_str(), g_sConfigFile.c_str());
+		_ASSERT(updated || GetLastError() == 0);
+	}
+}
 
 //===========================================================================
 BOOL RegLoadString (LPCTSTR section, LPCTSTR key, BOOL peruser, LPTSTR buffer, DWORD chars)
 {
+	if (!g_sConfigFile.empty())
+		return _ini::RegLoadString(section, key, peruser, buffer, chars);
+
 	TCHAR fullkeyname[256];
 	StringCbPrintf(fullkeyname, 256, TEXT("Software\\AppleWin\\CurrentVersion\\%s"), section);
 
@@ -88,6 +108,9 @@ BOOL RegLoadValue (LPCTSTR section, LPCTSTR key, BOOL peruser, DWORD* value, DWO
 
 //===========================================================================
 void RegSaveString (LPCTSTR section, LPCTSTR key, BOOL peruser, const std::string & buffer) {
+	if (!g_sConfigFile.empty())
+		return _ini::RegSaveString(section, key, peruser, buffer);
+
 	TCHAR fullkeyname[256];
 	StringCbPrintf(fullkeyname, 256, TEXT("Software\\AppleWin\\CurrentVersion\\%s"), section);
 
@@ -122,3 +145,4 @@ void RegSaveValue (LPCTSTR section, LPCTSTR key, BOOL peruser, DWORD value) {
 	StringCbPrintf(buffer, 32, "%d", value);
 	RegSaveString(section, key, peruser, buffer);
 }
+