Added Windows support for nonblocking character input.

CHANGES.txt

@@ -1,3 +1,8 @@
+Next Release
+
+  - When using the monitor, the nonblocking character input at
+    $F004 should now work on the Microsoft Windows platform.
+
 0.6 (2009-08-11)
 
   - Added monitor shortcut "a" for "assemble".

TODO.txt

@@ -6,5 +6,3 @@ Instructions needing unit tests:
 Better error messages when assembling fails.
 
 Ability to assemble more than one instruction at a time.
-
-Windows support for non-blocking character input.

src/py65/utils/console.py

@@ -1,12 +1,28 @@
+import sys
+
+if sys.platform[:3] == "win":
+    import msvcrt
+
+    def getch(stdin):
+        """ Performs a nonblocking read of one byte from the Windows
+        console and returns its ordinal value.  The stdin argument
+        is for function signature compatibility and is ignored.  If 
+        no byte is available, 0 is returned.
+        """
+        if msvcrt.kbhit():
+            return ord(msvcrt.getch())
+        return 0
+
+else:
     import select
     import os
+    import termios
+    import fcntl
 
     def getch(stdin):
         """ Performs a nonblocking read of one byte from stdin and returns 
         its ordinal value.  If no byte is available, 0 is returned.
         """
-    import termios
-    import fcntl
     
         fd = stdin.fileno()