diff --git a/ion/platform/simulator/Makefile b/ion/platform/simulator/Makefile
index de8721e3a..def0cfc01 100644
--- a/ion/platform/simulator/Makefile
+++ b/ion/platform/simulator/Makefile
@@ -1,4 +1,4 @@
-objs += $(addprefix ion/platform/simulator/, init.o platform.o)
+objs += $(addprefix ion/platform/simulator/, init.o platform.o framebuffer.o)
 objs += $(addprefix ion/drivers/, fltklcd/fltklcd.o fltkkbd/fltkkbd.o fltkkbd/fltkkbdbutton.o)
 
 #SFLAGS += -I/usr/local/Cellar/fltk/1.3.3/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT
diff --git a/ion/platform/simulator/framebuffer.c b/ion/platform/simulator/framebuffer.c
new file mode 100644
index 000000000..cae961c94
--- /dev/null
+++ b/ion/platform/simulator/framebuffer.c
@@ -0,0 +1,11 @@
+#include "framebuffer.h"
+#include <ion.h>
+#include <assert.h>
+
+void ion_set_pixel(uint8_t x, uint8_t y, uint8_t color) {
+  assert(x <= FRAMEBUFFER_WIDTH);
+  assert(y <= FRAMEBUFFER_HEIGHT);
+
+  char * byte = FRAMEBUFFER_ADDRESS + ((y*FRAMEBUFFER_WIDTH)+x);
+  *byte = color;
+}
diff --git a/ion/platform/simulator/framebuffer.h b/ion/platform/simulator/framebuffer.h
index ea0739dc9..4ffa25513 100644
--- a/ion/platform/simulator/framebuffer.h
+++ b/ion/platform/simulator/framebuffer.h
@@ -3,9 +3,9 @@
 
 extern void * PlatformFramebuffer;
 
-#define ION_FRAMEBUFFER_ADDRESS PlatformFramebuffer
-#define ION_FRAMEBUFFER_WIDTH 320
-#define ION_FRAMEBUFFER_HEIGHT 240
-#define ION_FRAMEBUFFER_BITS_PER_PIXEL 8
+#define FRAMEBUFFER_ADDRESS PlatformFramebuffer
+#define FRAMEBUFFER_WIDTH 320
+#define FRAMEBUFFER_HEIGHT 240
+#define FRAMEBUFFER_BITS_PER_PIXEL 8
 
 #endif