From: jnc@mercury.lcs.mit.edu (Noel Chiappa)
To: tuhs@tuhs.org
Cc: jnc@mercury.lcs.mit.edu
Subject: [TUHS] Re: Split addressing (I/D) space (inspired by the death of the python... thread)
Date: Fri, 4 Aug 2023 17:40:50 -0400 (EDT) [thread overview]
Message-ID: <20230804214050.BFD2A18C077@mercury.lcs.mit.edu> (raw)
> From: Clem Cole
> first two subsystems for the 11 that ran out of text space were indeed
> vi and Pascal subsystems
Those were at Berkeley. We've established that S-I&D were in V6 when it was
released in May, 1975 - so my question is 'what was Bell doing in 1975 that
needed more than 64KB?'
The kernel, yeah, it could definitely use S-I&D on a larger system
(especially when you remember that stock V6 didn't play any tricks with
overlays, and also dedicated one segment - the correct term, used in the 1972
-11/45 processor manual - to the user structure, and one to the I/O page,
limiting the non-S-I&D kernel to 48KB). But what user commands?
It happens that I have a complete dump of one of the MIT systems, so I had a
look to see what _we_ were running S-I&D on. Here's the list from /bin (for
some reason that machine doesn't have a /usr/bin):
a68
a86
c86
emacs
lisp
ndd
send
teco
The lisp wasn't a serious use; I think the only thing we ever used it for was
'doctor'. So, two editors, a couple of language tools, an email tool (not
sure why that one got it - maybe for creating large outgoing messages). (The
ndd is probably to allow the biggest possible buffers.)
Nothing in /etc, and in /lib, just lint1 and lint2 (lint, AFAICT, post-dates
V6). Not a lot.
So now I'm really curious what Bell was using S-I&D for. (If I weren't lazy,
I'd pull the V6 distro - which is only available as RK images, and individual
files, alas - and look in /bin and everywhere and see if I can find anything.
I suspect not, though.)
Anyone have any guesses/suggestions? Maybe some custom applications?
Noel
next reply other threads:[~2023-08-04 21:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-04 21:40 Noel Chiappa [this message]
-- strict thread matches above, loose matches on Subject: below --
2023-08-03 23:14 Steve Simon
2023-08-03 23:10 Noel Chiappa
2023-08-03 23:42 ` Warner Losh
2023-08-03 21:48 Noel Chiappa
2023-07-30 23:59 [TUHS] Re: Cool talk on Unix and Sendmail history, by Eric Allman Erik E. Fair
2023-08-01 10:58 ` Erik E. Fair
2023-08-02 0:37 ` Dave Horsfall
2023-08-02 14:52 ` Ron Natalie
2023-08-02 21:14 ` Grant Taylor via TUHS
2023-08-02 22:20 ` segaloco via TUHS
2023-08-02 23:49 ` Rich Salz
2023-08-03 0:51 ` [TUHS] Re: python Larry McVoy
2023-08-03 2:07 ` Clem Cole
2023-08-03 16:57 ` [TUHS] Re: [TULSA] " Phil Budne
2023-08-03 17:00 ` Rich Salz
2023-08-03 20:35 ` [TUHS] Split addressing (I/D) space (inspired by the death of the python... thread) Will Senn
2023-08-03 21:05 ` [TUHS] " Kenneth Goodwin
2023-08-03 21:10 ` Ronald Natalie
2023-08-03 21:16 ` Warner Losh
2023-08-03 21:24 ` Ronald Natalie
2023-08-03 22:34 ` Kenneth Goodwin
2023-08-03 21:05 ` Ronald Natalie
2023-08-03 21:44 ` Clem Cole
2023-08-03 22:08 ` Will Senn
2023-08-03 22:54 ` Clem Cole
2023-08-03 23:08 ` Dave Horsfall
2023-08-03 23:15 ` Clem Cole
2023-08-04 0:38 ` John Cowan
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