Reorganize the functions in the manual.

Author: dmsc

manual.md

@@ -557,6 +557,44 @@ functions supported by FastBasic.
                be used with integers
                and floating point.
 
+- RAND(_num_) : Returns a random, non
+                negative number, less
+                than _num_.
+
+- FRE() : Returns the free memory
+          available in bytes.
+
+- ERR() : Returns the last Input/Output
+          error value, or 1 if no error
+          was registered.
+
+- LEN(*string*) : Returns the length of
+                  the *string*.
+
+- VAL(*string*) : Convert *string* to a
+                  number. If no
+                  conversion is
+                  possible, ERR() is
+                  set to 18. Can be
+                  used with integers
+                  and floatign point.
+
+- ASC(*string*) : Returns the ATASCI
+                  code of the first
+                  character of the
+                  *string*.
+
+
+Atari Specific Functions
+------------------------
+
+The following functions allows
+interacting to the Atari hardware to
+read controller and keyboard input and
+to program with Player/Missile
+graphics.
+
+
 - PADDLE(_n_): Returns the value of the
                PADDLE controller _n_.
 
@@ -579,10 +617,6 @@ functions supported by FastBasic.
                controller _n_ button is
                pressed, 1 otherwise.
 
-- RAND(_num_) : Returns a random, non
-                negative number, less
-                than _num_.
-
 - KEY() : Returns 0 if no key was
           pressed, or a keycode. The
           returned value only goes to 0
@@ -593,29 +627,6 @@ functions supported by FastBasic.
           actually the same as_
           `(PEEK(764) EXOR 255)`.
 
-- FRE() : Returns the free memory
-          available in bytes.
-
-- ERR() : Returns the last Input/Output
-          error value, or 1 if no error
-          was registered.
-
-- LEN(*string*) : Returns the length of
-                  the *string*.
-
-- VAL(*string*) : Convert *string* to a
-                  number. If no
-                  conversion is
-                  possible, ERR() is
-                  set to 18. Can be
-                  used with integers
-                  and floatign point.
-
-- ASC(*string*) : Returns the ATASCI
-                  code of the first
-                  character of the
-                  *string*.
-
 
 Floating Point functions
 ------------------------