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

@@ -1,32 +1,48 @@
-import select
-import os
+import sys
 
-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.
-    """
+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.
+        """
     
-    fd = stdin.fileno()
+        fd = stdin.fileno()
 
-    oldterm = termios.tcgetattr(fd)
-    newattr = oldterm[:]
-    newattr[3] = newattr[3] & ~termios.ICANON & ~termios.ECHO
-    termios.tcsetattr(fd, termios.TCSANOW, newattr)
+        oldterm = termios.tcgetattr(fd)
+        newattr = oldterm[:]
+        newattr[3] = newattr[3] & ~termios.ICANON & ~termios.ECHO
+        termios.tcsetattr(fd, termios.TCSANOW, newattr)
 
-    oldflags = fcntl.fcntl(fd, fcntl.F_GETFL)
-    fcntl.fcntl(fd, fcntl.F_SETFL, oldflags | os.O_NONBLOCK)
+        oldflags = fcntl.fcntl(fd, fcntl.F_GETFL)
+        fcntl.fcntl(fd, fcntl.F_SETFL, oldflags | os.O_NONBLOCK)
 
-    try:
-        byte = 0
-        r, w, e = select.select([fd], [], [], 0.1)
-        if r:
-            c = stdin.read(1)
-            byte = ord(c)
-            if byte == 0x0a:
-                byte = 0x0d
-    finally:
-        termios.tcsetattr(fd, termios.TCSAFLUSH, oldterm)
-        fcntl.fcntl(fd, fcntl.F_SETFL, oldflags)
-    return byte
+        try:
+            byte = 0
+            r, w, e = select.select([fd], [], [], 0.1)
+            if r:
+                c = stdin.read(1)
+                byte = ord(c)
+                if byte == 0x0a:
+                    byte = 0x0d
+        finally:
+            termios.tcsetattr(fd, termios.TCSAFLUSH, oldterm)
+            fcntl.fcntl(fd, fcntl.F_SETFL, oldflags)
+        return byte