[Simh] teco macros for teco=emacs?

From: Rich Alderson <mail_at_alderson.users.panix.com>
Date: Sat Oct 30 20:07:02 2004

> Date: Sat, 30 Oct 2004 09:24:40 -0400
> From: shoppa_at_trailing-edge.com (Tim Shoppa)

>> Emacs was originally a bunch of teco macros right?

> Yeah, but not for DEC PDP-11 TECO.

> The MIT PDP-10 TECO and the macros that make it EMACS are on the web at

> http://pdp-10.trailing-edge.com/mit_emacs_170_teco_1220/index.html

>> teco/em ? a bunch of teco macros that emulate some simple useful subset
>> of emacs?

> Yeah, you could do that. I was never a big fan of EMACS (aka
> a later perjorative backronym: "Eight Megabytes and Continually Swapping".)

Ah, but Tim, that was early GNU emacs on underpowered Unix hosts. The memory
footprint of the original TECO implementation is much smaller:

    !i me

    167. pages, Entry vector loc 4043 len 3

      Section 0 R, W, E, Private
    0-5 Private R, W, E
    6-60 <EMACS>TECPUR.EXE.1220 1-53 R, E
    62-63 Private R, W, E
    64-65 <SUBSYS>EMACS.EXE.17001 10-11 R, CW, E
    66-73 Private R, W, E
    102-107 Private R, W, E
    632-633 <EMACS>TIME.ELIB.52 0-1 R, E
    634-635 <EMACS>MODLIN.ELIB.68 0-1 R, E
    636-651 <EMACS>TMACS.ELIB.430 0-13 R, E
    652-657 <EMACS>PURIFY.ELIB.1 0-5 R, E
    660-663 <EMACS>SLOWLY.ELIB.130 0-3 R, E
    664-671 <EMACS>TWENEX.ELIB.2 0-5 R, E
    672-777 <EMACS>EMACS.ELIB.170 0-105 R, E
    !

plus pages for mapping the file into memory--maxes out around 260 pages.

(For the non-36-bit crowd, a Tops-20 page is 512 36-bit words, holding 2560
ASCII chars.)

Rich Alderson
Current maintainer, MIT TECO EMACS (v. 170) and TECO (v. 1220)
Received on Sat Oct 30 2004 - 20:07:02 BST

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