filename

    The name of the RMS file that contains the EFI$CP commands
    to be invoked. Fields not specified within the RMS filename
    are defaulted, with the default filename specification being
    SYS$DISK:[].EFI$COM.

    The comment character for use within the file is the exclamation
    <!> character. All characters located after any exclamation
    embedded within a record are silently ignored. Any blank lines
    found present within the file are also silently ignored.