From 6d75c9ce0d5efecafb791a542a9134544812902d Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@users.sf.net>
Date: Sat, 10 Oct 2009 22:36:16 +0000
Subject: [PATCH] newppu: fix bug in _vt = 30,31 latching causing general
 malfunction (fix tecmo super bowl)

---
 NewPPUtests.txt | 2 +-
 src/ppu.cpp     | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/NewPPUtests.txt b/NewPPUtests.txt
index 5a25ddb2..e25ae2ee 100644
--- a/NewPPUtests.txt
+++ b/NewPPUtests.txt
@@ -2,7 +2,6 @@ NewPPU tests
 
 Bad
 Dragon's Lair - Black screen for level 1 (music plays)
-Tecmo Super Bowl (U) [!] - Intro screen messed up, menus out of whack, Team selection screen bad, pre game screen, field is messed up.
 Nightshade (U) - flickering
 
 Good
@@ -63,6 +62,7 @@ Super Mario Bros 2 USA
 Super Mario Bros 3
 Tecmobowl
 Tecmo NBA Basketball (U)
+Tecmo Super Bowl (U) [!] - [FIXED] Intro screen messed up, menus out of whack, Team selection screen bad, pre game screen, field is messed up.
 TMNT
 Transformers
 Zanac
diff --git a/src/ppu.cpp b/src/ppu.cpp
index 103afb84..5cdbac8f 100644
--- a/src/ppu.cpp
+++ b/src/ppu.cpp
@@ -208,6 +208,7 @@ struct PPUREGS {
 	void increment_vs() {
 		fv++;
 		vt += (fv>>3);
+		vt &= 31; //fixed tecmo super bowl
 		v += (vt==30)?1:0;
 		fv &= 7;
 		if(vt==30) vt=0;