From 5a43ca9a7aaf41921954f9dcbbbc38034036b942 Mon Sep 17 00:00:00 2001
From: Peter Evans <peter@modul8r.com>
Date: Sat, 10 Mar 2018 22:36:31 -0600
Subject: [PATCH] Return random data in read contexts

This applies only to addresses which aren't meant to return meaningful
data.
---
 src/apple2.dd.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/apple2.dd.c b/src/apple2.dd.c
index 214bf9c..814d9dd 100644
--- a/src/apple2.dd.c
+++ b/src/apple2.dd.c
@@ -9,6 +9,8 @@
  * itself.
  */
 
+#include <stdlib.h>
+
 #include "apple2.dd.h"
 #include "apple2.dec.h"
 #include "apple2.enc.h"
@@ -598,7 +600,7 @@ SEGMENT_READER(apple2_dd_switch_read)
         apple2_dd_switch_latch(drive, 0);
     }
 
-    return 0;
+    return (vm_8bit)(arc4random() & 0xff);
 }
 
 /*