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+.. highlight:: sh
+
 .. _hardware-maple:
 
 Maple
 =====
 
-Stub. TODO picture, describe what things do, serial bootloader
-uploading, etc. etc.
+.. contents:: Contents
+   :local:
+
+.. _maple-hardware-identify-rev:
+
+Identifying your Rev
+--------------------
+
+We went through three versions ("Revs") of the Maple hardware: Rev 1,
+Rev 3, and Rev 5 [#frev2_4]_; Rev 5, the final design, is currently on
+sale.  The following sections will help you to help you identify your
+Rev.  Known issues are listed in the :ref:`errata <errata>`.
+
+Rev 1
+^^^^^
+
+A small number of Maple Rev 1 boards went on sale in late 2009.  They
+have a light red silkscreen and a single pixelated leaf as a logo.
+
+.. figure:: /_static/img/maple_rev1.png
+   :align: center
+   :alt: Maple Rev 1
+
+.. rubric:: Footnotes
+
+.. [#frev2_4] Revs 2 and 4 were prototypes that didn't pass internal
+   testing.
+
+Rev 3
+^^^^^
+
+This batch of boards went on sale beginning in May 2010. They have a
+darker red silkscreen and the "infinity leaf" logo.  The Maple Rev 3
+was the first version which includes the built-in button, labeled BUT.
+It also includes a built-in LiPo battery charger.
+
+.. figure:: /_static/img/maple_rev3.png
+   :align: center
+   :alt: Maple Rev 3
+
+Rev 5
+^^^^^
+
+These boards went on sale in November 2010.  They have white buttons,
+and "r5" in small print near the "LeafLabs Maple" text next to the
+"infinity leaf" logo.  The Maple Rev 5 repositioned the double header
+on the right hand side to better fit 0.1 inch pitch breadboard.  This
+necessitated the removal of pins 21 and 22 from the double header;
+they are still available, but don't have any headers installed on
+them.
+
+.. figure:: /_static/img/maple_rev5.png
+   :align: center
+   :alt: Maple Rev 5
+
+Powering the Maple
+------------------
+
+The Maple's power source is determined by the header to the left of
+the "LeafLabs" label on the silkscreen.  All versions of the Maple can
+be powered from the barrel jack connector, USB, or a LiPo battery.  We
+ship the Maple with a jumper on the USB selector.  In order to power
+it off of an alternative source, unplug the Maple, then move the
+jumper to the desired selector before reconnecting power.
+
+You can also power the Maple via the pin labeled "Vin" on the lower
+header.  However, don't do this while simultaneously powering the
+Maple from another source, or you could damage the board.
+
+Using the Built-in Battery Charger
+----------------------------------
+
+Maples Rev 3 and Rev 5 also have a built-in LiPo battery charger.  In
+order to use it, put a jumper across the CHRG header on the power
+selection header and across the USB, or EXT selectors, depending on
+whether you're charging the battery via USB cable or barrel jack
+connector.  The LED labeled CHRG will light up while the battery is
+being charged.  When the battery is finished charging, the LED labeled
+DONE will also light up.
+
+Hardware Design Files
+---------------------
+
+The hardware schematics and board layout files are available in the
+`Maple github repository <https://github.com/leaflabs/maple>`_.  The
+design files for Rev 1, Rev 3, and Rev 5 are respectively in the
+``maple-r1``, ``maple-r3``, and ``maple-r5`` subdirectories.  A
+schematic for a JTAG adapter suitable for use with Maple is available
+in the ``jtagadapter`` directory.
+
+From the github repository main page, you can download the entire
+repository by clicking the "Download" button.  If you are familiar
+with `git <http://git-scm.com/>`_, you can also clone the repository
+at the command line with ::
+
+    $ git clone git://github.com/leaflabs/maple.git
+