VMS Help DECTPU, TPU$INITIALIZE, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    This is the first routine that must be called after establishing
    a condition handler.

    This routine initializes the editor according to the information
    received from the callback routine. The initialization routine
    defaults all file specifications to the null string and all
    options to off. However, it does not default the file I/O or
    call-user routine addresses.