From: Toni Wilen <twilen@winuae.net>
Date: Fri, 13 Feb 2026 18:34:26 +0000 (+0200)
Subject: Fast drawing mode VB fix
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=f9f0b5f3f8fc952f604b34d2a5b02b4d718c2e9a;p=francis%2Fwinuae.git

Fast drawing mode VB fix
---

diff --git a/custom.cpp b/custom.cpp
index 35811804..9fcbc262 100644
--- a/custom.cpp
+++ b/custom.cpp
@@ -12361,7 +12361,10 @@ static void do_cck(bool docycles)
 		check_bpl_vdiw();
 	}
 
-	check_hsyncs();
+	// if returning from fast mode: don't change VB state too early
+	if (custom_fastmode == 0) {
+		check_hsyncs();
+	}
 
 	if (agnus_hpos == HARDWIRED_DMA_TRIGGER_HPOS) {
 		if (custom_fastmode < 0) {
@@ -12463,9 +12466,8 @@ static void sync_equalline_handler(void)
 
 	custom_trigger_start();
 
-	check_vsyncs_fast();
-
 	if (eventtab[ev_sync].active) {
+		check_vsyncs_fast();
 		check_bpl_vdiw();
 		do_imm_dmal();
 	} else {