From 5cd15b17cb4f2aa9dd45a6d0d161cd8d5b82939a Mon Sep 17 00:00:00 2001
From: dinkc64 <12570148+dinkc64@users.noreply.github.com>
Date: Sun, 3 Aug 2014 20:13:41 +0000
Subject: [PATCH] timing fix for PCEngine from Barry @ forum

---
 src/burn/drv/pce/pce.cpp | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/burn/drv/pce/pce.cpp b/src/burn/drv/pce/pce.cpp
index a2ce40b06..d5c65f701 100644
--- a/src/burn/drv/pce/pce.cpp
+++ b/src/burn/drv/pce/pce.cpp
@@ -625,15 +625,20 @@ INT32 PCEFrame()
 	PCECompileInputs();
 
 	INT32 nCyclesTotal = (INT32)((INT64)7159090 * nBurnCPUSpeedAdjust / (0x0100 * 60));
-	
+	INT32 nCyclesDone = 0;
+	INT32 nCyclesSegment = 0;
+
 	h6280Open(0);
-	
+
 	for (INT32 i = 0; i < 262; i++)
 	{
-		h6280Run(nCyclesTotal / 262);
+		INT32 nNext;
+		nNext = (i + 1) * nCyclesTotal / 262;
+		nCyclesSegment = nNext - nCyclesDone;
+		nCyclesDone += h6280Run(nCyclesSegment);
 		interrupt();
 	}
-	
+
 	if (pBurnSoundOut) {
 		c6280_update(pBurnSoundOut, nBurnSoundLen);
 	}