README
10/13/04

These are images of 4 ITS backup tapes containing lisp machine source
code.  This is an early snapshot from the MIT AI labs, about the time
Symbolics was formed.  This software is designed to run on the CADR
lisp machine.  The system version of this software is "46".

This software is licensed by the Massachusetts Institute of Technology.
Please read the LICENSE file.

The tapes are labeled:

	Lisp Machine System Software
	Reel 1,2,3,4 10/17/81	
	9 track - 800bpi	
	ITS dump format	

To read them you need to :

1) convert them from their existing format to "simh" format
2) use 'itstar' to extract the files

Programs to do this are included.

Note that the tape2 is "damaged" because the first block is unreable.
We forward spaced file and then bsf'd and bsr'd (backspace record)
about 40 times and then started the image program.  In order to make
itstar happy I spliced 20 bytes on the front of it (see tpc2simh.c).
I believe we only lost one file, a SUDS file for the chaosnet board.

I am working to recover this tape and hope to have a fixed image
shortly.

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Credits:

I would like to thank Tom Knight for working with the PTO office at
MIT to secure permission to release these tape.  Howard Shrobe was
very helpful and encouraging.  Richard Greenblatt answered a lot of
dumb questions and let me look in his garage.  Danial Weinreb found
the tapes in his basement and provided some helpful insights.

Brad Parker
brad@heeltoe.com

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Notes on what is in the sources:

From some 'chinual' source files

Lisp Machine Manual
Second Preliminary Version
January 1979
Daniel Weinreb
David Moon

This report describes research done at the Artificial Intelligence
Laboratory of the Massachusetts Institute of Technology.  Support for
the laboratory's artificial intelligence research is provided in part
by the Advanced Research Projects Agency of the Department of Defense
under Office of Naval Research Contract number N00014-75-C-0643.

(c) Copyright by the Massachusetts Institute of Technology; Cambridge,
Mass. 02139 All rights reserved.

system.versin	- says "46"
promh.9		- prom version 9
ucadr.694	- micrcode version 694

The SUDS files appear to be for the "cadr4" schematics.

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FILES IN THIS RELEASE:

README				this file
LICENSE				MIT license text - please read!

doit.sh				script to extract sources
tpc2simh.c			program to convert tpc to simh format
itstar.tar.gz			ITS back tape reader

lmss_itsdump_101780.tar.gz	extracted sources tar file
extract				extracted source dir

Original "tpc" tape images:

-rw-rw-r--    1 brad     brad     15231846 Oct 12 19:39 mit1.tpc
-rw-rw-r--    1 brad     brad     15446387 Oct 12 20:05 mit2.tpc
-rw-rw-r--    1 brad     brad     15176474 Oct 12 20:19 mit3.tpc
-rw-rw-r--    1 brad     brad     11922791 Oct 12 20:34 mit4.tpc

"tpc" images converted to "simh" format:

-rw-rw-r--    1 brad     brad     15214196 Oct 12 23:07 mit1.simh
-rw-rw-r--    1 brad     brad     15431140 Oct 12 23:25 mit2.simh
-rw-rw-r--    1 brad     brad     15158636 Oct 12 23:07 mit3.simh
-rw-rw-r--    1 brad     brad     11909344 Oct 12 23:09 mit4.simh