From mboxrd@z Thu Jan  1 00:00:00 1970
From: lars at nocrew.org (Lars Brinkhoff)
Date: Fri, 21 Aug 2020 09:08:41 +0000
Subject: [COFF] [TUHS] Memory management in Dennis Ritchie's C Compiler
In-Reply-To: <20200817195108.75FED18C09E@mercury.lcs.mit.edu> (Noel Chiappa's
 message of "Mon, 17 Aug 2020 15:51:08 -0400 (EDT)")
References: <20200817195108.75FED18C09E@mercury.lcs.mit.edu>
Message-ID: <7wtuwwe57q.fsf@junk.nocrew.org>

Noel Chiappa writes:
>     > From: Larry
>     > It's possible the concept existed in some other OS but I'm not
>     > aware of it.
>
> It's pretty old. Both TENEX and ITS had the ability to map file pages
> into a process' address space.

I have a date for when this feature was announced for ITS.  The previous
.CBLK UUO could not access files.

RMS 09/30/73 10:13:28  JOBS! BE FIRST IN YOUR TREE TO INSERT A DISK FILE PAGE!
SEE .INFO.;CORBLK ORDER FOR DETAILS.

(This is now redirected to COFF.)

In related news: A rather complete full dump of the MIT-AI PDP-10 from
1971 has been found.  It includes full source code and documentation for
the system, including ITS version 671, DDT, TECO, MIDAS, (MAC)LISP,
CHESS (MacHack), MUDDLE, LOGO, MACSYMA, etc.