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-rw-r--r--src/mame/drivers/de_2.cpp8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/mame/drivers/de_2.cpp b/src/mame/drivers/de_2.cpp
index 628e46554de..51e9f3303de 100644
--- a/src/mame/drivers/de_2.cpp
+++ b/src/mame/drivers/de_2.cpp
@@ -11,15 +11,19 @@
#include "emu.h"
#include "machine/genpin.h"
+
#include "cpu/m6800/m6800.h"
#include "cpu/m6809/m6809.h"
-#include "machine/decopincpu.h"
#include "machine/6821pia.h"
-#include "sound/ym2151.h"
+#include "machine/decopincpu.h"
#include "sound/msm5205.h"
+#include "sound/ym2151.h"
+#include "speaker.h"
+
#include "de2.lh"
#include "de2a3.lh"
+
// To start Secret Service, hold I, O and Left ALT while pressing Start.
// To start Laser War, hold S, D, and F while pressing Start.
// To start Back to the Future, hold D and F while pressing Start.