From b91359610a028d4190d2cd7559a34c4a8a24c852 Mon Sep 17 00:00:00 2001
From: Sjoerd van der Berg <harekiet@users.sourceforge.net>
Date: Tue, 18 Nov 2003 22:32:13 +0000
Subject: [PATCH] port 61 xors bit 4 on and off during reads

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1451
---
 src/hardware/keyboard.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/hardware/keyboard.cpp b/src/hardware/keyboard.cpp
index c73f585e..23d9395d 100644
--- a/src/hardware/keyboard.cpp
+++ b/src/hardware/keyboard.cpp
@@ -197,6 +197,7 @@ static void write_p60(Bit32u port,Bit8u val) {
 
 static Bit8u read_p61(Bit32u port) {
 	port_61_data^=0x20;
+	port_61_data^=0x10;
 	return port_61_data;
 }