From 4c1c9d7c678ed03305f39c23c9c4483cde4fcb98 Mon Sep 17 00:00:00 2001
From: dinkc64 <terra79pin@yahoo.com>
Date: Wed, 19 Jun 2024 01:32:32 -0400
Subject: [PATCH] wwfsstar, better sync

---
 src/burn/drv/pre90s/d_wwfsstar.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/burn/drv/pre90s/d_wwfsstar.cpp b/src/burn/drv/pre90s/d_wwfsstar.cpp
index b22ef1dc6..9bd42f469 100644
--- a/src/burn/drv/pre90s/d_wwfsstar.cpp
+++ b/src/burn/drv/pre90s/d_wwfsstar.cpp
@@ -37,6 +37,8 @@ static UINT8 DrvJoy3[16];
 static UINT8 DrvDips[2];
 static UINT8 DrvReset;
 
+static INT32 nExtraCycles;
+
 static INT32 vblank = 0;
 
 static struct BurnInputInfo WwfsstarInputList[] = {
@@ -271,6 +273,8 @@ static INT32 DrvDoReset()
 
 	vblank = 1;
 
+	nExtraCycles = 0;
+
 	return 0;
 }
 
@@ -670,7 +674,7 @@ static INT32 DrvFrame()
 
 	INT32 nInterleave = 256;
 	INT32 nCyclesTotal[2] = { 10000000 / 60, 3579545 / 60 };
-	INT32 nCyclesDone[2] = { 0, 0 };
+	INT32 nCyclesDone[2] = { nExtraCycles, 0 };
 
 	SekOpen(0);
 	ZetOpen(0);
@@ -693,6 +697,8 @@ static INT32 DrvFrame()
 		MSM6295Render(pBurnSoundOut, nBurnSoundLen);
 	}
 
+	nExtraCycles = nCyclesDone[0] - nCyclesTotal[0];
+
 	ZetClose();
 	SekClose();
 
@@ -722,7 +728,7 @@ static INT32 DrvScan(INT32 nAction, INT32 *pnMin)
 		BurnYM2151Scan(nAction, pnMin);
 		MSM6295Scan(nAction, pnMin);
 
-		SCAN_VAR(vblank);
+		SCAN_VAR(nExtraCycles);
 	}
 
 	return 0;