From c08d1b35debf214c8a543e9423d48ef39f012e63 Mon Sep 17 00:00:00 2001
From: Toni Wilen <twilen@winuae.net>
Date: Sun, 24 Aug 2025 14:12:21 +0300
Subject: [PATCH] Fix NCR bank masking

---
 pcem/vid_ncr.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pcem/vid_ncr.cpp b/pcem/vid_ncr.cpp
index 492a5a7a..c40aef4a 100644
--- a/pcem/vid_ncr.cpp
+++ b/pcem/vid_ncr.cpp
@@ -1022,7 +1022,7 @@ void ncr_updatebanking(ncr_t *ncr)
     bool rwsep = false;
 	uint32_t bankprimary, banksecondary;
 
-    svga->banked_mask = (svga->seqregs[0x20] & 1) ? 0x1ffff : 0xffff;
+    svga->banked_mask = (svga->seqregs[0x20] & 1) ? 0xffff : 0x7fff;
     if (svga->seqregs[0x1e] & 0x10) {
         bankprimary = (svga->seqregs[0x18] << 8) | svga->seqregs[0x19];
         bankprimary <<= 6;
-- 
2.47.3