From 9442b706172b92fa0205b6b9de09240d41c4f6f6 Mon Sep 17 00:00:00 2001
From: Neil Webber <neil@webber.com>
Date: Sat, 4 May 2024 13:59:48 -0500
Subject: [PATCH] implement write lock

---
 rk11.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/rk11.py b/rk11.py
index 1758f57..b12d3ba 100644
--- a/rk11.py
+++ b/rk11.py
@@ -201,7 +201,9 @@ class RK11:
                 pass
 
             case 0o16, 1:                    # write lock (write protect)
-                self.writelock()
+                f = self._get_drive_f()
+                if f is not None:
+                    self._writelocks.add(f)
 
             case _, 0:            # anything else without the go bit is a nop
                 pass