;; public args
       X_pos   = ARGVEC + 0
       Y_pos   = ARGVEC + 1
       code    = ARGVEC + 2

       ;; private variables
       screen_position = $EE ; 16-bit value (uses EF)
       ;; 16-bit value, we reuse bytes from X_pos
       X_pos_offset_hi = $ED
       X_pos_offset_lo = X_pos
       ;; 16-bit value, we reuse bytes from Y_pos
       Y_pos_offset_hi = $EC
       Y_pos_offset_lo = Y_pos
       ;; 16-bit value, we reuse bytes from code
       petski_position_lo = code
       petski_position_hi = code + 1 # this clobers the ARGVEK space ik but it's faster. CURSED AF

       ;; values
       VIC_bank = $4000
       Character_generator_ROM = $D000