From fcabd353d9bd13a06f008d7be4d689a22ed59da0 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Thu, 22 Feb 2024 00:56:28 +0100
Subject: [PATCH] Check IOPL on 286 task segments.

---
 src/cpu/386_common.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/cpu/386_common.c b/src/cpu/386_common.c
index 847408ba8..0abf8e936 100644
--- a/src/cpu/386_common.c
+++ b/src/cpu/386_common.c
@@ -1605,8 +1605,12 @@ checkio(uint32_t port, int mask)
 {
     uint32_t t;
 
-    if (!(tr.access & 0x08))
+    if (!(tr.access & 0x08)) {
+        if ((CPL) > (IOPL))
+            return 1;
+
         return 0;
+    }
 
     cpl_override = 1;
     t            = readmemw(tr.base, 0x66);