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4 files changed, 23 insertions, 15 deletions

diff --git a/source/lang/analogwrite.rst b/source/lang/analogwrite.rst
index 3d05f44..2c50a42 100644
--- a/source/lang/analogwrite.rst
+++ b/source/lang/analogwrite.rst
@@ -25,6 +25,8 @@ analogWrite()
 .. contents:: Contents
    :local:
 
+.. _lang-analogwrite-compatibility:
+
 Arduino Compatibility
 ---------------------
 
diff --git a/source/lang/serial.rst b/source/lang/serial.rst
index f96547d..ca89b31 100644
--- a/source/lang/serial.rst
+++ b/source/lang/serial.rst
@@ -20,25 +20,24 @@ pins summarized in the following table:
    :header-rows: 1
 
    * - Serial port
-     - Pins (TX, RX)
+     - TX, RX, CK
+     - CTS, RTS (if present)
 
    * - ``Serial1``
-     - 7, 8
+     - 7, 8, 6
+     -
 
    * - ``Serial2``
-     - 1, 0
+     - 1, 0, 10
+     - 2, 3
 
    * - ``Serial3``
-     - 29, 30
+     - 29, 30, 31
+     - 32, 33
 
 Thus, if you use a particular serial port, you cannot also use its
 communication pins for other purposes at the same time.
 
-Unlike the Arduino, none of these serial ports is connected to the USB
-port on the Maple board.  Thus, to use these pins to communicate with
-your personal computer, you will need an additional USB-to-serial
-adaptor.
-
 If you want to communicate with the Maple using the provided USB port,
 use :ref:`SerialUSB <lang-serialusb>` instead.
 
@@ -60,8 +59,8 @@ means that you can use any of these functions on any of ``Serial1``,
 
 .. cpp:class:: HardwareSerial
 
-   Serial port class.  Predefined instances are Serial1, Serial2, and
-   Serial3.
+   Serial port class.  Predefined instances are ``Serial1``,
+   ``Serial2``, and ``Serial3``.
 
 .. cpp:function:: HardwareSerial::begin(unsigned int baud)
 
@@ -73,7 +72,7 @@ means that you can use any of these functions on any of ``Serial1``,
 .. cpp:function:: HardwareSerial::end()
 
    Disables the USART associated with this object, allowing any
-   associated TX and RX pins to be used for other purposes.
+   associated communication pins to be used for other purposes.
 
 .. cpp:function:: unsigned int HardwareSerial::available()
 
@@ -203,6 +202,14 @@ means that you can use any of these functions on any of ``Serial1``,
    ``println()`` functions is likely to be more useful when printing
    multiple characters, when formatting numbers for printing, etc.
 
+Arduino Compatibility Note
+--------------------------
+
+Unlike the Arduino, none of the Maple's serial ports is connected to
+the USB port on the Maple board (for that, use :ref:`SerialUSB
+<lang-serialusb>`).  Thus, to use these pins to communicate with your
+personal computer, you will need an additional USB-to-serial adaptor.
+
 .. TODO LATER port these examples over
 
 .. Examples
diff --git a/source/lang/serialusb.rst b/source/lang/serialusb.rst
index 9beee82..af3a7e0 100644
--- a/source/lang/serialusb.rst
+++ b/source/lang/serialusb.rst
@@ -71,6 +71,8 @@ world!")``.
 
    Returns the number of bytes available for reading.
 
+.. _lang-serialusb-read:
+
 .. cpp:function:: unsigned char USBSerial::read()
 
    Returns the next available, unread character.  If there are no
diff --git a/source/lang/unimplemented/stringclass.rst b/source/lang/unimplemented/stringclass.rst
index cdd385d..b893e83 100644
--- a/source/lang/unimplemented/stringclass.rst
+++ b/source/lang/unimplemented/stringclass.rst
@@ -3,7 +3,4 @@
 String Class
 ============
 
-Stub.
-
-
 .. include:: /lang/cc-attribution.txt