INT 21 - European MSDOS 4.0 - "SETFILETABLE" - INSTALL NEW FILE HANDLE TABLE
        AH = 86h
        BX = total number of file handles in new table
Return: CF clear if successful
        CF set on error
            AX = error code (06h,08h) (see AH=59h)
Desc:   adjust the size of the per-process open file table, thus raising or
          lowering the limit on the number of files the caller can open
          simultaneously
Notes:  any currently-open files are copied to the new table
        if the table is increased beyond the default 20 handles, only the
          first 20 will be inherited by child processes
        error 06h is returned if the requested number of handles exceeds
          system limits or would require closing currently-open files
SeeAlso: AH=67h