From 1143a511b50455bd418417005e9b1c2fbc9c2aef Mon Sep 17 00:00:00 2001
From: Peter Ferrie <peter.ferrie@gmail.com>
Date: Tue, 12 Sep 2017 16:39:40 -0700
Subject: [PATCH] apple2e: don't update 80-col screen immediately on page
 switch

---
 src/mame/drivers/apple2e.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/mame/drivers/apple2e.cpp b/src/mame/drivers/apple2e.cpp
index 9e423c3c2e6..5d513cf45c6 100644
--- a/src/mame/drivers/apple2e.cpp
+++ b/src/mame/drivers/apple2e.cpp
@@ -1343,14 +1343,20 @@ void apple2e_state::do_io(address_space &space, int offset, bool is_iic)
 			break;
 
 		case 0x54:  // set page 1
-			machine().first_screen()->update_now();
+			if (!m_video->m_80col)
+			{
+				machine().first_screen()->update_now();
+			}
 			m_page2 = false;
 			m_video->m_page2 = false;
 			auxbank_update();
 			break;
 
 		case 0x55:  // set page 2
-			machine().first_screen()->update_now();
+			if (!m_video->m_80col)
+			{
+				machine().first_screen()->update_now();
+			}
 			m_page2 = true;
 			m_video->m_page2 = true;
 			auxbank_update();