include 'gsos.equ' stubs proc export judge_name export create export destroy export change_path export set_file_info export open export read export write export flush export close export get_mark export set_mark export get_eof export set_eof export get_dir_entry export get_dev_num export format export erase_disk judge_name create destroy change_path set_file_info get_file_info open read write flush close get_mark set_mark get_eof set_eof get_dir_entry get_dev_num format erase_disk lda #invalid_fst_op sec rtl endp end