EDIT/TECO invokes the TECO text editor.  TECO is an editor capable of
 both basic editing and complex programmed string processing.

Formats

 EDIT/TECO file-spec                   to edit an existing file
 EDIT/TECO file-spec/OUTPUT=new-file   to edit from one file to another
 EDIT/TECO file-spec/CREATE            to create a new file

 EDIT/TECO/EXECUTE=cmd-file-spec       to execute a TECO command file
 EDIT/TECO/EXECUTE=cmd-file-spec text  as above, but passes a text argument

Additional information available:

InitializationDefaultsMemoryQualifiers

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 /NOCOMMAND can be used.  To
 explicitly specify a start up TECO macro file, the qualifier
 /COMMAND=file-spec can be used.

Additional information available:

ActionsConditionsExample

Your initialization TECO macro can request the following actions
 by returning a bit encoded numeric value.

      1 => Load and start up VTEDIT.TEC (scope editing macro)
      2 => Only inspect specified file (/READ_ONLY)
      4 => Inhibit TECO's memory (/NOMEMORY)
      8 => Position to VTEDIT's position marker
     16 => Enable scope editing SEEALL mode (-1,3:W)
     32 => Enable scope editing HOLD screen mode (-1,5:W)
    128 => Enable scope editing scroll mode (2:W/4,7:W)
    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

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.

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"

Your LOGIN.COM file can define an EDIT/TECO command with preset
 qualifiers if desired.  The qualifiers /NOCOMMAND, /NOCREATE, and
 /NOMEMORY are always recognized so that they can be preset at command
 definition time.  To disable all TECO start up actions you would use

        TECO == "EDIT/TECO/NOCOMMAND/NOCREATE/NOMEMORY"

 To disable only TECO's memory you would use

        TECO == "EDIT/TECO/NOMEMORY"

 Etc.

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.

Additional information available:

/COMMAND/CREATE/EXECUTE/MEMORY/OUTPUT/READ_ONLY

 /COMMAND, the default, will use the start up TECO macro described
  by the logical TEC$INIT, if any.
 /COMMAND=file-spec will use the start up TECO macro in the
  specified file.
 /NOCOMMAND completely inhibits any special start up actions.

 /CREATE, the default, will cause a new file to be created if the
  specified editing file doesn't exist.
 /NOCREATE inhibits any automatic file creation.

 /EXECUTE=file-spec causes the specified TECO macro file to be
  executed.

 /MEMORY, the default, will utilize TECO's memory logical TEC$MEMORY.
 /NOMEMORY competely inhibits TECO's memory feature.

 /OUTPUT=file-spec will cause the edited file to be written into
  the specified file-spec instead of creating the next higher
  version of the same file.

 /READ_ONLY will cause the specified editing file to be only
  read; no output file will be created.