diff --git a/BaS_gcc/Makefile b/BaS_gcc/Makefile
index 77af505..ac0c945 100644
--- a/BaS_gcc/Makefile
+++ b/BaS_gcc/Makefile
@@ -9,7 +9,7 @@
 
 # can be either "Y" or "N" (without quotes). "Y" for using the m68k-elf-, "N" for using the m68k-atari-mint
 # toolchain
-COMPILE_ELF=Y
+COMPILE_ELF=N
 
 ifeq (Y,$(COMPILE_ELF))
 TCPREFIX=m68k-elf-
diff --git a/BaS_gcc/include/mmu.h b/BaS_gcc/include/mmu.h
index 1d69c29..75561c7 100644
--- a/BaS_gcc/include/mmu.h
+++ b/BaS_gcc/include/mmu.h
@@ -26,6 +26,34 @@
 
 #include "bas_types.h"
 
+/*
+ * ACR register handling macros
+ */
+#define ACR_BA(x)                   ((x) & 0xffff0000)
+#define ACR_ADMSK(x)                (((x) & 0xffff) << 16)
+#define ACR_E(x)                    (((x) & 1) << 15)
+
+#define ACR_S(x)                    (((x) & 3) << 13)
+#define ACR_S_USERMODE              0
+#define ACR_S_SUPERVISOR_MODE       1
+#define ACR_S_ALL                   2
+
+#define ACR_AMM(x)                  (((x) & 1) << 10)
+
+#define ACR_CM(x)                   (((x) & 3) << 5)
+#define ACR_CM_CACHEABLE_WT         0x0
+#define ACR_CM_CACHEABLE_CB         0x1
+#define ACR_CM_CACHE_INH_PRECISE    0x2
+#define ACR_CM_CACHE_INH_IMPRECISE  0x3
+
+#define ACR_SP(x)           (((x) & 1) << 3)
+#define ACR_W(x)            (((x) & 1) << 2)
+
+
+/*
+ * MMU register handling macros
+ */
+
 #define SCA_PAGE_ID		6	/* indicates video memory page */
 
 #define MMU_PAGE_SIZE_1M	0
diff --git a/BaS_gcc/sys/mmu.c b/BaS_gcc/sys/mmu.c
index 30423cf..3d8707e 100644
--- a/BaS_gcc/sys/mmu.c
+++ b/BaS_gcc/sys/mmu.c
@@ -24,26 +24,6 @@
  * Copyright 2013        M. Froeschle
  */
 
-#define ACR_BA(x)                   ((x) & 0xffff0000)
-#define ACR_ADMSK(x)                (((x) & 0xffff) << 16)
-#define ACR_E(x)                    (((x) & 1) << 15)
-
-#define ACR_S(x)                    (((x) & 3) << 13)
-#define ACR_S_USERMODE              0
-#define ACR_S_SUPERVISOR_MODE       1
-#define ACR_S_ALL                   2
-
-#define ACR_AMM(x)                  (((x) & 1) << 10)
-
-#define ACR_CM(x)                   (((x) & 3) << 5)
-#define ACR_CM_CACHEABLE_WT         0x0
-#define ACR_CM_CACHEABLE_CB         0x1
-#define ACR_CM_CACHE_INH_PRECISE    0x2
-#define ACR_CM_CACHE_INH_IMPRECISE  0x3
-
-#define ACR_SP(x)           (((x) & 1) << 3)
-#define ACR_W(x)            (((x) & 1) << 2)
-
 #include <stdint.h>
 #include "bas_printf.h"
 #include "bas_types.h"