diff --git a/src/burn/drv/dataeast/d_simpl156.cpp b/src/burn/drv/dataeast/d_simpl156.cpp
index 294c7466a..e27a3db54 100644
--- a/src/burn/drv/dataeast/d_simpl156.cpp
+++ b/src/burn/drv/dataeast/d_simpl156.cpp
@@ -545,11 +545,11 @@ static INT32 DrvFrame()
 	INT32 nTotalCycles = 28000000 / 58;
 
 	ArmOpen(0);
-	deco16_vblank = 0xf0;
-	ArmRun(nTotalCycles - 2240);
-	ArmSetIRQLine(ARM_IRQ_LINE, ARM_HOLD_LINE);
 	deco16_vblank = 0x00;
-	ArmRun(2240);
+	ArmRun(nTotalCycles - 12240);
+	ArmSetIRQLine(ARM_IRQ_LINE, ARM_HOLD_LINE);
+	deco16_vblank = 0xf0;
+	ArmRun(12240);
 	ArmClose();
 
 	if (pBurnSoundOut) {