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Teco-differences between TOPS-10 and VMS
(by Hans de Hartog, HOO-3/011)
Going from TOPS10-Teco to VMS-Teco should be no problem if
the following items are taken into account: VMS supports
the same functionality under Teco as TOPS10 except for a
very few oldfashioned things.
Also the commands that have different names, formats and/or
arguments are those that are rarely used in daily editing.
The following is a list of commands that are not the same as
under TOPS-10 but whose equivalent (or mostly greater)
funcionality is implemented under VMS:
1. Window/screen-handling (F0-, FX-, FY- and
FZ-registers) is done under VMS by the
VTEDIT-option which is a set of Teco-macro's that
almost completely simulate a full-screen-editor.
2. The /-command (to give detailed info about previous
error) is implemented via the setting of the
3. Under TOPS20, ^Z closes outputfile and exits from
Teco. Under VMS, the same is accomplished by ^C;
one can even intercept ^C within macro's by looking
at some control-flag.
4. Control over translation to/from lower/upper case
(^V and ^W) only works for a single character.
The following is a list of features under TOPS10-Teco that
are not available under VMS:
1. The EZ-command (zeros non-disk derectory and opens
file for output).
2. The nEM-comands for tape-handling (rewind,
3. The (seldom-used) match-control constructs ^E<nnn>
ans ^E[a,b,c,...] .
4. The ^\-match-control construct (to accept either
case for all characters upto the second ^\).
Furthermore, Teco under VMS offers a lot of handy features
that are not under TOPS10 such as editing more files via
wildcarding, secondary input and/or output, one's
complement, abbreviation for 0TT (V), backward searching,
more sophisticated find/search and substitute-commands, more
sophisticated Q-register functionality, much more flags in
control-registers (ED, EH, ET, EO) and last but not least
(via the /VTEDIT-option) almost full-screen edit
For more information, see the PDP-11 Teco Users's Guide
(Order No. DEC-11-UTECA-B-D).