chdir
getcurdir
findfirst
findnext
_ff_attrib
_ff_time
_ff_date
_ff_size
_ff_name
fnsplit
fnmerge
_fullpath
getcwd
getdisk()
setdisk
mkdir
rmdir
searchpath
getdfree
unlink
chsize
close
creat
creatnew
creattemp
dup
dup2
eof
filelength
getftime
setftime
isatty
lock
unlock
locking
lseek
open
read
write
rename
setmode
[****]