633



     120 ON Y GOTO 150, 130, 140
     130 REM YOUR MOVE DOWN ROUTINE HERE
     135 GOTO 10
     140 REM YOUR MOVE UP ROUTINE HERE
     145 GOTO 10
     150 REM IF X <> 1 THEN NOTHING DOING.
          BRANCH TO YOUR OTHER ROUTINES OR
          TO 155
     155 GOTO 10
     1000 FOR LOOP = 1764 TO 1790: READ BY
          TE: POKE LOOP, BYTE: NEXT LOOP
     1010 DATA 104,104,133,213,104,41,12,7
          4,74,73,2,24,105,1
     1020 DATA 133,212,96,104,104,133,213,
          104,41,3,76,237,6
     1030 RETURN

     See locations 88, 89 ($58, $59) for an example of a USR call using
     a string instead of a fixed memory location.

633            279            STICK1
     This and the next two locations are the same as 632, but for the
     other joysticks. These four locations are also used to determine if
     a lightpen (PEN 0 - 3) switch is pressed.

634            27A            STICK2

635            27B            STICK3

636            27C            PTRIG0
     Paddle trigger 0. Used to determine if the trigger or hutton on
     paddle 0 is pressed (zero is returned) or not (one is returned).
     Since these are the same lines as the joystick left/right switches,
     you can use PTRIG for horizontal movement. PTRIG(1) -
     PTRIG(0) returns -1 (left), 0 (center), + 1 (right). The next seven
     locations are for the other paddle buttons. PTRIG 0 - 3 are
     shadows for PIA register 54016 ($D300).

637            27D            PTRIG1

638            27E            PTRIG2

639            27F            PTRIG3

640            280            PTRIG4
     PTRIG 4-7 are shadows for PIA register 54017 ($D301).