AT&T 6300 Programmer's Manual page 158

INTRODUCTION
The following GWBASIC commands, statements, and functions
are described in this chapter.
ABS
ASC
ATN
AUTO
BEEP
BLOAD
BSAVE
CALL
CALLS
CDBL
CHAIN
CHDIR
7-2
Returns the absolute value of a numeric
expression.
Returns the ASCII decimal code for the first
character of a given string.
Returns the arctangent of the argument.
Generates a line number after every carriage
return. AUTO is used only for entering
programs.
Activates the bell.
Loads a memory image file into memory.
Saves sections of the main memory on the
specified file.
Transfers control to a machine language
subroutine. Passes unsegmented addresses.
Transfers control to a machine language
subroutine. Passes segmented addresses.
Converts a given numeric expression to a double
precision number.
Transfers control and passes variables to another
program.
Changes the current directory.