From ad1749999de006a464771bc3266202b5d665fe76 Mon Sep 17 00:00:00 2001
From: mpohoreski <mpohoreski@b5e51362-a710-0410-a134-be2176fc2e42>
Date: Tue, 28 Feb 2006 18:38:57 +0000
Subject: [PATCH] Drol, and Karateka fixes/notes, until the Floating-Bus code
 is in.

---
 AppleWin/source/Video.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/AppleWin/source/Video.cpp b/AppleWin/source/Video.cpp
index 0732003a..a20550ef 100644
--- a/AppleWin/source/Video.cpp
+++ b/AppleWin/source/Video.cpp
@@ -1200,7 +1200,7 @@ void VideoCheckPage (BOOL force) {
 BYTE __stdcall VideoCheckVbl (WORD, BYTE, BYTE, BYTE, ULONG)
 {
 	/*
-		// Drol Hangs when finished
+		// Drol expects = 80
 		68DE A5 02    LDX #02
 		68E0 AD 50 C0 LDA TXTCLR
 		68E3 C9 80    CMP #80
@@ -1215,9 +1215,16 @@ BYTE __stdcall VideoCheckVbl (WORD, BYTE, BYTE, BYTE, ULONG)
 		69D5 AD 50 C0 LDA TXTCLR
 		69D8 C9 80    CMP #80
 		69DA D0 F7    BNE $68DE
+
+		// Karateka expects < 80
+		// Returns 00 or FF on Apple ][
+		07DE AD 19 C0 LDA RDVBLBAR
+		07E1 30 FB    BMI $7DE
 	*/		
+
+//		return MemReturnRandomData(dwVBlCounter <= nVBlStop_NTSC);
 	if (dwVBlCounter <= nVBlStop_NTSC)
-		return MemReturnRandomData(dwVBlCounter <= nVBlStop_NTSC);
+		return 0x00;
 	else
 		return 0x80;
 }