1 TECO
 You can invoke TECO with the traditional TECO commands, TECO, MAKE,
 and MUNG.

 Formats

 TECO file-spec                    to edit an existing file
 TECO out-file-spec=in-file-spec   to edit from one file to another
 MAKE file-spec                    to create a new file
 MUNG cmd-file-spec                to execute a TECO command file
 MUNG cmd-file-spec text-arg       as above, but passes a text argument
                                   in the text buffer

 As these are not built-in DCL commands, you must define them in your
 LOGIN.COM file. You may define these as foreign commands, as follows:

          TECO == "$SYS$SYSTEM:TECO32 TECO "
          MAKE == "$SYS$SYSTEM:TECO32 MAKE "
          MUNG == "$SYS$SYSTEM:TECO32 MUNG "

 Alternately, you may define the commands as synonyms for the equivalent
 DCL EDIT/TECO commands, as follows:

          TECO == "EDIT/TECO"
          MAKE == "EDIT/TECO/CREATE"
          MUNG == "EDIT/TECO/EXECUTE"

 Note that interpretation of qualifiers depends on how you have
 defined the commands. The qualifiers documented in this section apply
 to the foreign command definition. For details on the EDIT/TECO
 command, see the description of the EDIT command in this help library
 or EDIT/TECO in the main DCL help library, HELPLIB.HLB.
2 Initialization
 TECO decodes its commands with a built-in command decoder.  If TECO
 finds the logical name TEC$INIT, its equivalence string is assumed
 to be either a TECO macro or, if the string starts with a dollar
 sign ($), the rest of the string is assumed to be a file-spec
 containing a TECO macro to be executed every start up.  To disable
 the lookup of TEC$INIT, the qualifier /NOINI can be used.
3 Actions
 Your initialization TECO macro can request the following actions
 by returning a bit encoded numeric value.

      1 => Load and start up VTEDIT.TEC (/VTEDIT)
      2 => Only inspect specified file (/INSPECT)
      4 => Inhibit TECO's memory (/NOMEMORY)
      8 => Position to VTEDIT's position marker (/FIND)
     16 => Enable scope editing SEEALL mode (/VTEDIT:SEEALL)
     32 => Enable scope editing HOLD screen mode (/VTEDIT:HOLD)
    128 => Enable scope editing scroll mode (/SCROLL)
    256 => Inhibit automatic file creation (/NOCREATE)
   4096 => Initialization is complete
   8192 => Force TECO to update TECO's memory
  16384 => Display file being edited
  32768 => Initialization used TECO's memory; TECO shouldn't
3 Conditions
 When the initialization TECO macro is executed, the following
 conditions are in effect.

  Text buffer   User's editing command
  Q-register 0  Initialization TECO macro itself
  Q-register 9  TECO's built-in command decoder data storage
  Q-register Y  TECO's built-in command decoder TECO macro

 The user's editing command in the text buffer can be modified
 by the initialization TECO macro.

 All other Q-registers are initially scratch and can be used or
 loaded by the initialization TECO macro; their contents will
 subsequently be preserved.
3 Example
 The following initialization TECO macro always disallows automatic
 file creation (256) and, for scope terminals only (512 in ET),
 enables scope editing scroll mode (128) in SEEALL mode (16) with
 immediate mode command output turned off (-1EV).

  256U0 ET&512"N Q0#128#16U0 -1EV ' Q0#4096

 This initialization TECO macro would be defined as the equivalence
 string to the logical TEC$INIT as follows.

  $ DEFINE TEC$INIT "256U0 ET&512""N Q0#128#16U0 -1EV ' Q0#4096"
2 Defaults
 Your LOGIN.COM file can define the TECO command with preset qualifiers
 if desired.  The qualifiers /NOCRE, /NOINI, and /NOMEM are recognized
 by all TECO commands so that they can be preset at command definition
 time.  To disable all TECO start up actions you would use

        TECO == "$SYS$SYSTEM:TECO32 TECO/NOCRE/NOINI/NOMEM"

 To disable only TECO's memory you would use

        TECO == "$SYS$SYSTEM:TECO32 TECO/NOMEM"

 Etc.
2 Memory
 TECO automatically remembers the file being edited.  The file's
 name is stored in a process logical called TEC$MEMORY.  If you
 invoke TECO without specifying a file-spec, TECO will read its
 memory logical and re-edit the last edited file.  TECO's memory
 feature is completely inhibited by the /NOMEMORY qualifier.
2 Qualifiers
/FIND

 Initially position to (find) the last marked position in the input
 file.  Position is marked with the VTEDIT ESCape-F commands.

/INSPECT

 Simply read the file-spec, don't create a new edited copy.

/NOCREATE

 Do not automatically create a new file if the file specified by a
 TECO command doesn't already exist.

/NOINI

 Do not attempt to find or use TECO's private initialization
 logical TEC$INIT.

/NOMEMORY

 Do not read, create, or use TECO's memory logical TEC$MEMORY.

/SCROLL

 Automatically enter split screen scrolling mode.  The bottom 1/4 of
 the screen's lines are scrolled.  The following qualifier keywords
 can be used to initially set scrolling modes:

   /SCROLL:n
    Set the number of lines to scroll to n.
   /SCROLL:SEEALL
    Set scrolling into SEEALL mode.
   /SCROLL:n:SEEALL
    Set the number of lines to scroll to n and SEEALL mode.

/VTEDIT

 Automatically invoke the TECO keypad editor VTEDIT.  The following
 qualifier keywords can be used to initially set VTEDIT modes:

   /VTEDIT:HOLD
    Set VTEDIT into hold screen mode.
   /VTEDIT:SEEALL
    Set VTEDIT into SEEALL mode.
   /VTEDIT:HOLD:SEEALL  -or-  /VTEDIT:SEEALL:HOLD
    Set VTEDIT into both hold screen and SEEALL modes.

 Note: VTEDIT does not ship as part of the OpenVMS operating system, but
 is available from various public sources including the DECUS library.