diff --git a/TODO b/TODO
index 8451048..2a45ae2 100644
--- a/TODO
+++ b/TODO
@@ -8,3 +8,4 @@ TODO mlx_exit()
 
 TODO hook functions should be compatible again
 TODO mlx_init: use GSP_RGBA8_OES, and change mlx_get_data_addr accordingly
+TODO use GSPGPU
diff --git a/include/mlx_init.h b/include/mlx_init.h
index 64ab72d..aebcb74 100644
--- a/include/mlx_init.h
+++ b/include/mlx_init.h
@@ -34,6 +34,6 @@
 ///         NULL if failed.
 t_mlx	mlx_init(void); // TODO should call this before REALLY anything else?
 
-// TODO mlx_end() or something? mlx_destroy_display()?
+// TODO mlx_end() or something? mlx_destroy_display()? (with C2D_Fini())
 
 #endif
diff --git a/source/mlx_init.c b/source/mlx_init.c
index 4876ac5..b8dfa28 100644
--- a/source/mlx_init.c
+++ b/source/mlx_init.c
@@ -10,6 +10,7 @@
 #include "mlx_internal.h"
 #include <stdlib.h>
 #include "3ds.h"
+#include <citro2d.h>
 
 static t_internal_mlx	g_internal_mlx;
 
@@ -18,9 +19,9 @@ t_mlx	mlx_init(void)
 	if (g_internal_mlx.is_init_called)
 		mlx3ds_internal_fatalerror("mlx_init() must be called only once");
 	g_internal_mlx.is_init_called = true;
-	gfxInitDefault();
-	gfxSetDoubleBuffering(GFX_TOP, false);
-	gfxSetDoubleBuffering(GFX_BOTTOM, false);
+	gfxInit(FRAMEBUFFER_FORMAT, FRAMEBUFFER_FORMAT, false);
 	consoleInit(GFX_BOTTOM, NULL);
+	C2D_Init(SIZE_MAX); // TODO C2D use SIZE_MAX?
+	C2D_Prepare(); // TODO C2D overrides gfxInit??
 	return (&g_internal_mlx);
 }
diff --git a/source/mlx_internal.h b/source/mlx_internal.h
index db5018d..510998f 100644
--- a/source/mlx_internal.h
+++ b/source/mlx_internal.h
@@ -16,6 +16,10 @@
 # include "3ds.h"
 # include "mlx_events.h"
 
+# define FRAMEBUFFER_FORMAT GSP_RGBA8_OES // GSPGPU_FramebufferFormat
+# define FRAMEBUFFER_BPP 32 // must be coherent with above 
+# define FRAMEBUFFER_ENDIAN 0 // ??? // must be coherent with above
+
 /// @brief Write an error message and exit the program.
 ///
 /// @param msg Message to write. Must use less than 38 colons.
diff --git a/wiki/BASICS.mc b/wiki/BASICS.mc
index 3090d9b..d50611c 100644
--- a/wiki/BASICS.mc
+++ b/wiki/BASICS.mc
@@ -6,3 +6,5 @@ How to change a original MinilibX project to a 3DS one:
 - main must be main(void)
 - new inputs
 - use assets instead of files
+- change big malloc/free to linearAlloc/linearFree
+- change color format and adapt everything