diff -r ca9e48af31e6 -r 1f607fa8542f MiniDisplay/FutabaVfd.cpp
--- a/MiniDisplay/FutabaVfd.cpp	Fri May 30 15:02:15 2014 +0200
+++ b/MiniDisplay/FutabaVfd.cpp	Sun Jun 01 21:15:33 2014 +0200
@@ -74,7 +74,7 @@
 GP1212A01A::GP1212A01A():
 	iDisplayPositionX(0),iDisplayPositionY(0),
     iOffScreenMode(true),
-    iUseFrameDiffAlgo(true),
+    iUseFrameDifferencing(true),
     iFrameNext(NULL),
     iFrameCurrent(NULL),
     iFramePrevious(NULL),
@@ -376,7 +376,7 @@
 	if (OffScreenMode())
 		{
 		//Send host back buffer to device back buffer
-        if (!iUseFrameDiffAlgo || iNeedFullFrameUpdate<KNumberOfFrameBeforeDiffAlgo)
+        if (!iUseFrameDifferencing || iNeedFullFrameUpdate<KNumberOfFrameBeforeDiffAlgo)
             {
             iNeedFullFrameUpdate++;
             SetPixelBlock(0,0,63,FrameBufferSizeInBytes(),iFrameNext->Ptr());
@@ -406,20 +406,20 @@
 	}
 
 
+//Define the edge of our pixel block
+//Pixel blocks of 32x32 seems to run almost as fast as full screen update in worse case scenarii.
+//Though I wonder if in some situations 16 could be better. Make this an attribute at some point if need be.
+const int KPixelBlockEdge = 32;
+const int KPixelBlockSizeInBits = KPixelBlockEdge*KPixelBlockEdge;
+const int KPixelBlockSizeInBytes = KPixelBlockSizeInBits/8;
+
+
 /**
  * @brief GP1212A01A::SendModifiedPixelBlocks
  * Compare our back and front buffer and send to the device only the modified pixels.
  */
 void GP1212A01A::SendModifiedPixelBlocks()
     {
-    //The largest pixel block we can sanely send with one report is 16*16
-    //const int KBlocksPerRow = WidthInPixels()/16; //16
-    //const int KBlocksPerColumn = HeightInPixels()/16; //4
-
-    const int KPixelBlockEdge = 16;
-    const int KPixelBlockSizeInBits = KPixelBlockEdge*KPixelBlockEdge;
-    const int KPixelBlockSizeInBytes = KPixelBlockSizeInBits/8;
-
     int w=WidthInPixels();
     int h=HeightInPixels();