From 5b2b253dcf27d24e6b183a06d2c4625d5fae0181 Mon Sep 17 00:00:00 2001
From: Toni Wilen <twilen@winuae.net>
Date: Thu, 16 Apr 2026 18:52:16 +0300
Subject: [PATCH] Do not emulate  hp=1 special case in fast CPU modes.

---
 custom.cpp | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/custom.cpp b/custom.cpp
index f4814b79..f4f200e0 100644
--- a/custom.cpp
+++ b/custom.cpp
@@ -2385,15 +2385,17 @@ static void incpos(uae_u16 *hpp, uae_u16 *vpp)
 	if (syncs_stopped) {
 		return;
 	}
-	if (hp == 1) {
-		vp++;
-		if (vp == maxvpos + lof_store) {
-			vp = 0;
+	if (currprefs.cpu_memory_cycle_exact) {
+		if (hp == 1) {
+			vp++;
+			if (vp == maxvpos + lof_store) {
+				vp = 0;
+			}
+		}
+		hp++;
+		if (hp == maxhpos || hp == maxhpos_long) {
+			hp = 0;
 		}
-	}
-	hp++;
-	if (hp == maxhpos || hp == maxhpos_long) {
-		hp = 0;
 	}
 	if (canvhposw()) {
 		if (agnus_pos_change >= 1) {
-- 
2.47.3