From e5a925d9b18f34985540daef3955b82b62864648 Mon Sep 17 00:00:00 2001
From: dinkc64 <12570148+dinkc64@users.noreply.github.com>
Date: Thu, 23 Oct 2014 05:03:01 +0000
Subject: [PATCH] little update to shaolins

---
 src/burn/drv/konami/d_shaolins.cpp | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/burn/drv/konami/d_shaolins.cpp b/src/burn/drv/konami/d_shaolins.cpp
index ba72ef057..218b281c8 100644
--- a/src/burn/drv/konami/d_shaolins.cpp
+++ b/src/burn/drv/konami/d_shaolins.cpp
@@ -360,10 +360,10 @@ static INT32 DrvInit()
 	M6809SetReadHandler(shaolins_read);
 	M6809Close();
 
-	SN76496Init(0, 1536000, 0);
+	SN76489Init(0, 1536000, 0);
 	SN76496SetRoute(0, 1.00, BURN_SND_ROUTE_BOTH);
 
-	SN76496Init(1, 3072000, 1);
+	SN76489Init(1, 3072000, 1);
 	SN76496SetRoute(1, 1.00, BURN_SND_ROUTE_BOTH);
 
 	GenericTilesInit();
@@ -486,6 +486,7 @@ static INT32 DrvFrame()
 	INT32 nInterleave = 256;
 	INT32 nCyclesTotal[1] = { 1536000 / 60 };
 	INT32 nCyclesDone[1] = { 0 };
+	INT32 nSoundBufferPos = 0;
 
 	M6809Open(0);
 
@@ -497,11 +498,25 @@ static INT32 DrvFrame()
 			M6809SetIRQLine(0x20, M6809_IRQSTATUS_AUTO); // 480x/second (8x/frame)
 
 		if (i == 240) M6809SetIRQLine(0, M6809_IRQSTATUS_AUTO);
+
+		// Render Sound Segment
+		if (pBurnSoundOut) {
+			INT32 nSegmentLength = nBurnSoundLen - nSoundBufferPos;
+			INT16* pSoundBuf = pBurnSoundOut + (nSoundBufferPos << 1);
+			SN76496Update(0, pSoundBuf, nSegmentLength);
+			SN76496Update(1, pSoundBuf, nSegmentLength);
+			nSoundBufferPos += nSegmentLength;
+		}
 	}
 
+	// Make sure the buffer is entirely filled.
 	if (pBurnSoundOut) {
-		SN76496Update(0, pBurnSoundOut, nBurnSoundLen);
-		SN76496Update(1, pBurnSoundOut, nBurnSoundLen);
+		INT32 nSegmentLength = nBurnSoundLen - nSoundBufferPos;
+		INT16* pSoundBuf = pBurnSoundOut + (nSoundBufferPos << 1);
+		if (nSegmentLength) {
+			SN76496Update(0, pSoundBuf, nSegmentLength);
+			SN76496Update(1, pSoundBuf, nSegmentLength);
+		}
 	}
 
 	M6809Close();