diff --git a/demos/modules/gdisp/gdisp_basics/gfxconf.h b/demos/modules/gdisp/gdisp_basics/gfxconf.h
index c2098c85..8adc7c8d 100644
--- a/demos/modules/gdisp/gdisp_basics/gfxconf.h
+++ b/demos/modules/gdisp/gdisp_basics/gfxconf.h
@@ -31,9 +31,9 @@
 #define _GFXCONF_H
 
 /* The operating system to use - one of these must be defined */
-#define GFX_USE_OS_CHIBIOS		TRUE
-#define GFX_USE_OS_WIN32		FALSE
-#define GFX_USE_OS_POSIX		FALSE
+//#define GFX_USE_OS_CHIBIOS		TRUE
+//#define GFX_USE_OS_WIN32		FALSE
+//#define GFX_USE_OS_POSIX		FALSE
 
 /* GFX sub-systems to turn on */
 #define GFX_USE_GDISP			TRUE
diff --git a/demos/modules/gdisp/gdisp_circles/gfxconf.h b/demos/modules/gdisp/gdisp_circles/gfxconf.h
index c5faba5d..8858cf02 100644
--- a/demos/modules/gdisp/gdisp_circles/gfxconf.h
+++ b/demos/modules/gdisp/gdisp_circles/gfxconf.h
@@ -31,9 +31,9 @@
 #define _GFXCONF_H
 
 /* The operating system to use - one of these must be defined */
-#define GFX_USE_OS_CHIBIOS		TRUE
-#define GFX_USE_OS_WIN32		FALSE
-#define GFX_USE_OS_POSIX		FALSE
+//#define GFX_USE_OS_CHIBIOS		TRUE
+//#define GFX_USE_OS_WIN32		FALSE
+//#define GFX_USE_OS_POSIX		FALSE
 
 /* GFX sub-systems to turn on */
 #define GFX_USE_GDISP			TRUE
@@ -52,4 +52,8 @@
 #define GDISP_NEED_ASYNC		FALSE
 #define GDISP_NEED_MSGAPI		FALSE
 
+#define GFX_USE_GMISC			TRUE
+#define GMISC_NEED_FIXEDTRIG	TRUE
+#define GMISC_NEED_FASTTRIG		TRUE
+
 #endif /* _GFXCONF_H */
diff --git a/demos/modules/gdisp/gdisp_circles/main.c b/demos/modules/gdisp/gdisp_circles/main.c
index 8feaa2e3..b8b90478 100644
--- a/demos/modules/gdisp/gdisp_circles/main.c
+++ b/demos/modules/gdisp/gdisp_circles/main.c
@@ -40,12 +40,12 @@ int main(void) {
     height = gdispGetHeight();
 
     // Code Here
-	gdispDrawCircle(width/2, height/2, 20, Yellow);
-    gdispFillCircle (width/4, height/4, 50, Blue);
-    gdispFillEllipse (width-100, height-100, 30, 60, Red);
-    gdispDrawEllipse (width-100, height-100, 50, 20, Yellow);
-    gdispDrawArc(width-width/8, height/8, 30, 10, 70, Gray);
-    gdispFillArc(width/8, height/8, 30, 10, 70, Gray);
+	gdispFillArc(width/2, height/2, width/4, -10, -45, White);
+	gdispDrawCircle(width/2+width/8, height/2-height/8, 13, Green);
+	gdispFillCircle (width/2+width/8, height/2-height/8, 10, Red);
+	gdispDrawArc(width/2+width/8, height/2-height/8, 20, 25, 115, Gray);
+	gdispFillEllipse (width-width/6, height-height/6, width/8, height/16, Blue);
+	gdispDrawEllipse (width-width/6, height-height/6, width/16, height/8, Yellow);
 
     while(TRUE) {
     	gfxSleepMilliseconds(500);