AT&T 6300 Programmer's Manual page 167

Introduction
ON TIMER(n) Causes an event trap every "n" seconds.
GOSUB
OPEN Allows I/O to a file or device.
OPEN COM Opens a communications file.
OPTION Defines the minimum value for array subscripts.
BASE
OUT Transmits a byte to an output port.
PAINT Paints an enclosed area on the screen with a
specified color. (Graphics Mode.)
PEEK Returns the byte read from the specified memory
location.
PLAY Plays music in accordance with a string that
specifies the notes to be played and the way in
which the notes are to be played.
PLAY(n) Returns the number of notes remaining in the
music background buffer.
PLAY ON/ Enables, disables, or suspends PLAY(n) trapping.
OFF/STOP
PMAP Converts physical coordinates to world
coordinates or vice versa. (Graphics Mode.)
POINT With two arguments (x,y), returns the color
number of a pixel on the screen. If one
argument(n) is given, returns the current
graphics coordinate. (Graphics Mode.)
POKE Writes a byte into a memory location.
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