import conio
    const NORMAL   = $FF
    const INVERSE  = $3F
    const FLASH    = $7F
    const ECHO_ON  = $80
    const ECHO_OFF = $00
    struc t_conio
        word keypressed
        word getkey
        word echo
        word home
        word gotoxy
        word viewport
        word texttype
        word textmode
        word grmode
        word grcolor
        word grplot
        word tone
        word rnd
    end
end
