Apple II User Manual

                In this case V=0 will be executed,                      505 V=0: REM SET

                                                                        V=0

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

RESTORE         RESTORE                                                 510 RESTORE

                Allows the re-reading of DATA statements,

                After a RESTORE, the next piece of data

                read will be the first piece listed in the first

                DATA statement of the program.  The

                second piece of data read will be the second

                piece listed in the first DATA statement,

                and so on as in a normal READ operation.

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

RETURN          RETURN                                                  50 RETURN

                Causes a subroutine to return to the state-

                ment after the most recently executed

                GOSUB.

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

STOP            STOP                                                    900 STOP

                Causes a program to stop execution and to

                enter command mode.

                Prints BREAK IN LINE 900.  (As per this

                example.)  CONT after a STOP branches

                to the statement following the STOP.

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

USR             USR (argument)                                          200 V=USR(W)

                Calls the user's machine language subroutine

                with the argument.  See PEEK and POKE in

                Subject 303, and Appendix F.

SYMBOL          SYNTAX/FUNCTION                                         EXAMPLE

WAIT            WAIT (address, mask [, select] )                        805 WAIT I,J,K

                This statement reads the contents of the                806 WAIT I,J

                addressed location, does an Exclusive-OR

                with the select value, and then ANDs the

                result with the mask.  This sequence is

                repeated until a non-zero result is obtained,

                at which time execution continues at the

                statement that follows WAIT.  If the WAIT

                statement has no select argument, the

                select value is assumed to be zero.  If you

                are waiting for a bit to become zero, there

                should be a "one" in the corresponding

                bit position of the select value.  The select

                value (K) and the mask value (J) can range

                from 0 to 255.  The address (I) can range

                from 0 to 65535.

305  INPUT/OUTPUT STATEMENTS

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

DATA            DATA item [, item...]                                   10 DATA 1,3,-1E3,.04

                Specifies data, read from left to right.

                Information appears in data statements in

                the same order as it will be read in the

                program.

                Strings may be read from DATA state-                    20 DATA "FOO",Z1

                ments.  If you want the string to contain

                leading spaces (blanks), colons (:) or