From 51194d49280fd0e796ebeedf8d87721b1d3a1b95 Mon Sep 17 00:00:00 2001
From: Thomas Perl <m@thp.io>
Date: Thu, 21 May 2020 11:12:28 +0200
Subject: [PATCH] not40h -> not 40h

---
 src/chapter-31.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/chapter-31.md b/src/chapter-31.md
index d21c061..8dae0fa 100644
--- a/src/chapter-31.md
+++ b/src/chapter-31.md
@@ -831,7 +831,7 @@ CONSTANT_TO_INDEXED_REGISTER SC_INDEX,MAP_MASK,0fh
         out     dx,al
         inc     dx
         in      al,dx
-        and     al,not40h                ;turn off doubleword
+        and     al,not 40h                ;turn off doubleword
         out     dx,al
         dec     dx
         mov     al,MODE_CONTROL