diff --git a/Configuration.h b/Configuration.h
index 82204dc..f6c0275 100644
--- a/Configuration.h
+++ b/Configuration.h
@@ -80,6 +80,12 @@ enum Compatibility
 #define HOME_Z_G "homez.g"
 #define HOME_ALL_G "homeall.g"
 
+#define LIST_SEPARATOR ':'						// Lists in G Codes
+#define FILE_LIST_SEPARATOR ','					// Put this between file names when listing them
+#define FILE_LIST_BRACKET '"'					// Put these round file names when listing them
+
+#define GCODE_LETTERS { 'X', 'Y', 'Z', 'E', 'F' } // The drives and feedrate in a GCode
+
 #define LONG_TIME 300.0 // Seconds
 
 #define EOF_STRING "<!-- **EoF** -->"
diff --git a/GCodes.cpp b/GCodes.cpp
index 9af5d75..38cffe7 100644
--- a/GCodes.cpp
+++ b/GCodes.cpp
@@ -2022,6 +2022,7 @@ float GCodeBuffer::GetFValue()
   if(readPointer < 0)
   {
      platform->Message(HOST_MESSAGE, "GCodes: Attempt to read a GCode float before a search.\n");
+     readPointer = -1;
      return 0.0;
   }
   float result = (float)strtod(&gcodeBuffer[readPointer + 1], 0);
@@ -2029,6 +2030,60 @@ float GCodeBuffer::GetFValue()
   return result; 
 }
 
+// Get a :-separated list of floats after a key letter
+
+const void GCodeBuffer::GetFloatArray(float a[], int& length)
+{
+	length = -1;
+	if(readPointer < 0)
+	{
+		platform->Message(HOST_MESSAGE, "GCodes: Attempt to read a GCode float array before a search.\n");
+		readPointer = -1;
+		return;
+	}
+
+	bool inList = true;
+	while(inList)
+	{
+		length++;
+		a[length] = (float)strtod(&gcodeBuffer[readPointer + 1], 0);
+		readPointer++;
+		while(gcodeBuffer[readPointer] && (gcodeBuffer[readPointer] != ' ') && (gcodeBuffer[readPointer] != LIST_SEPARATOR))
+			readPointer++;
+		if(gcodeBuffer[readPointer] != LIST_SEPARATOR)
+			inList = false;
+	}
+	length++;
+	readPointer = -1;
+}
+
+// Get a :-separated list of longs after a key letter
+
+const void GCodeBuffer::GetLongArray(long l[], int& length)
+{
+	length = -1;
+	if(readPointer < 0)
+	{
+		platform->Message(HOST_MESSAGE, "GCodes: Attempt to read a GCode long array before a search.\n");
+		readPointer = -1;
+		return;
+	}
+
+	bool inList = true;
+	while(inList)
+	{
+		length++;
+		l[length] = strtol(&gcodeBuffer[readPointer + 1], 0, 0);
+		readPointer++;
+		while(gcodeBuffer[readPointer] && (gcodeBuffer[readPointer] != ' ') && (gcodeBuffer[readPointer] != LIST_SEPARATOR))
+			readPointer++;
+		if(gcodeBuffer[readPointer] != LIST_SEPARATOR)
+			inList = false;
+	}
+	length++;
+	readPointer = -1;
+}
+
 // Get a string after a G Code letter found by a call to Seen().
 // It will be the whole of the rest of the GCode string, so strings
 // should always be the last parameter.
@@ -2038,6 +2093,7 @@ const char* GCodeBuffer::GetString()
 	if(readPointer < 0)
 	{
 		platform->Message(HOST_MESSAGE, "GCodes: Attempt to read a GCode string before a search.\n");
+		readPointer = -1;
 		return "";
 	}
 	const char* result = &gcodeBuffer[readPointer+1];
@@ -2065,6 +2121,7 @@ const char* GCodeBuffer::GetUnprecedentedString()
   if(!gcodeBuffer[readPointer])
   {
      platform->Message(HOST_MESSAGE, "GCodes: String expected but not seen.\n");
+     readPointer = -1;
      return gcodeBuffer; // Good idea?
   }
 
@@ -2081,6 +2138,7 @@ long GCodeBuffer::GetLValue()
   if(readPointer < 0)
   {
     platform->Message(HOST_MESSAGE, "GCodes: Attempt to read a GCode int before a search.\n");
+    readPointer = -1;
     return 0;
   }
   long result = strtol(&gcodeBuffer[readPointer + 1], 0, 0);
diff --git a/GCodes.h b/GCodes.h
index 7e79bb5..9530f91 100644
--- a/GCodes.h
+++ b/GCodes.h
@@ -25,8 +25,6 @@ Licence: GPL
 #define STACK 5
 #define GCODE_LENGTH 100 // Maximum length of internally-generated G Code string
 
-#define GCODE_LETTERS { 'X', 'Y', 'Z', 'E', 'F' } // The drives and feedrate in a GCode
-
 // Small class to hold an individual GCode and provide functions to allow it to be parsed
 
 class GCodeBuffer
@@ -41,6 +39,8 @@ class GCodeBuffer
     long GetLValue();									// Get a long integer after a key letter
     const char* GetUnprecedentedString();				// Get a string with no preceeding key letter
     const char* GetString();							// Get a string after a key letter
+    const void GetFloatArray(float a[], int& length);	// Get a :-separated list of floats after a key letter
+    const void GetLongArray(long l[], int& length);		// Get a :-separated list of longs after a key letter
     const char* Buffer();								// All of the G Code itself
     bool Finished() const;								// Has the G Code been executed?
     void SetFinished(bool f);							// Set the G Code executed (or not)
diff --git a/Platform.h b/Platform.h
index b79f0f9..0ad1669 100644
--- a/Platform.h
+++ b/Platform.h
@@ -158,8 +158,6 @@ Licence: GPL
 #define GCODE_DIR "0:/gcodes/" 					// Ditto - g-codes
 #define SYS_DIR "0:/sys/" 						// Ditto - system files
 #define TEMP_DIR "0:/tmp/" 						// Ditto - temporary files
-#define FILE_LIST_SEPARATOR ','					// Put this between file names when listing them
-#define FILE_LIST_BRACKET '"'					// Put these round file names when listing them
 #define FILE_LIST_LENGTH (1000) 				// Maximum length of file list
 #define MAX_FILES (42)							// Maximum number of files displayed