Liquid Crystal Display Modules
                     ==============================

+--------+---------------------------+-----------------------------+
|        |      Write                |         Read                |
+========+===========================+=============================+
| base+0 |     Command               |     Status                  |
|        |                           | b7: BUSY                    |
+--------+---------------------------+                             |
| base+1 |     Data                  |                             |
+--------+---------------------------+-----------------------------+

LCD Commands
------------
&00        -
&01 CLS    Clear display
&02 HOME   Home cursor
&03 CR     Carridge return
&04        Move cursor right after writing
&05        Move cursor left after writing
&06 RIGHT  Move cursor right
&07 LEFT   Move cursor left
&08 LINE   Underline cursor
&09 BLOCK  Block cursor
&0A        Cursor blink off
&0B        Cursor blink on
&0C        Display off
&0D        Display on
&0E        Cursor off
&0F        Cursor on
&10        Reset
&20        Supress display off
&60        Supress display on
&80+x      Set cursor address