diff --git a/example/arm/Makefile b/example/arm/Makefile
index d677f4d..987484d 100644
--- a/example/arm/Makefile
+++ b/example/arm/Makefile
@@ -20,3 +20,14 @@ include base.mk
 
 main.elf: LDSCRIPT = main.lds
 main.elf: start.o main.o audio.pcm.o
+
+.SUFFIXES:
+.INTERMEDIATE:
+.SECONDARY:
+.PHONY: all clean
+
+%: RCS/%,v
+%: RCS/%
+%: %,v
+%: s.%
+%: SCCS/s.%
diff --git a/example/arm/main.cpp b/example/arm/main.cpp
index 7a0fbab..41fb9d8 100644
--- a/example/arm/main.cpp
+++ b/example/arm/main.cpp
@@ -2,7 +2,7 @@
 
 extern void * _sine_start __asm("_binary_audio_pcm_start");
 
-extern volatile uint32_t * dram __asm("dram");
+extern volatile uint32_t dram[0x200000] __asm("dram");
 
 extern "C"
 void main()
@@ -46,6 +46,8 @@ void main()
   aica.common.TIMA(0);
   aica.channel[0].KYONEX(1);
 
+  dram[0] = 0x11223344;
+
   while (1) {
     if (aica.common.TIMA() >= 1) {
       aica.common.TIMA(0);