From a1f2f7634fd05bbe2cac8ddec903579c1a977b64 Mon Sep 17 00:00:00 2001
From: Barry Harris <44396066+barry65536@users.noreply.github.com>
Date: Thu, 7 Aug 2014 20:17:29 +0000
Subject: [PATCH] megadrive.cpp - fix DrawWindow for 32-cell mode

---
 src/burn/drv/megadrive/megadrive.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/burn/drv/megadrive/megadrive.cpp b/src/burn/drv/megadrive/megadrive.cpp
index 7ed4b0d19..994920217 100644
--- a/src/burn/drv/megadrive/megadrive.cpp
+++ b/src/burn/drv/megadrive/megadrive.cpp
@@ -3427,9 +3427,13 @@ static void DrawWindow(INT32 tstart, INT32 tend, INT32 prio, INT32 sh)
 	INT32 blank = -1; // The tile we know is blank
 
 	// Find name table line:
-	nametab  = (RamVReg->reg[3] & 0x3c)<<9;
-	if (RamVReg->reg[12] & 1) nametab += (Scanline>>3)<<6;	// 40-cell mode
-	else					  nametab += (Scanline>>3)<<5;	// 32-cell mode
+	if (RamVReg->reg[12] & 1) {
+		nametab  = (RamVReg->reg[3] & 0x3c)<<9;
+		nametab += (Scanline>>3)<<6;	// 40-cell mode
+	} else {
+		nametab  = (RamVReg->reg[3] & 0x3e)<<9;
+		nametab += (Scanline>>3)<<5;	// 32-cell mode
+	}
 
 	tilex = tstart<<1;
 	tend <<= 1;