From esokolov@ox.ac.uk Mon Jan 01 02:08:46 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!esokolov
From: esokolov@ox.ac.uk (Élodie Sokolov)
Newsgroups: comp.sys.m68k
Subject: Discussion: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Jan01.020846.6358@ox.ac.uk>
Date: Mon, 01 Jan 1996 02:08:46 GMT
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Hardware disassembly report for Motorola hardware hackers.

The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle.
Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14.

Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet.

-- 
Élodie Sokolov
Opinions expressed are solely my own and not those of Oxford University Computing Laboratory.
------------------------------------------------------------

From aramirez@kth.se Tue Jan 02 13:33:46 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!kth!aramirez
From: aramirez@kth.se (Aiko Ramírez)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Jan02.133346.2179@kth.se>
Date: Tue, 02 Jan 1996 13:33:46 GMT
References: <1996Jan01.020846.6358@ox.ac.uk>
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In article <1996Jan01.020846.6358@ox.ac.uk>, esokolov@ox.ac.uk (Élodie Sokolov) writes:
> Hardware disassembly report for Motorola hardware hackers.

Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him.

-- 
Aiko Ramírez | aramirez@kth.se
PGP Key fingerprint: D965 B39B 1845 EEC2
"Keep the channels open."

From mmoreno@illinois.edu Wed Jan 03 02:44:46 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!mmoreno
From: mmoreno@illinois.edu (Marta Moreno)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Jan03.024446.5640@illinois.edu>
Date: Wed, 03 Jan 1996 02:44:46 GMT
References: <1996Jan01.020846.6358@ox.ac.uk> <1996Jan02.133346.2179@kth.se>
Organization: University of Illinois Urbana-Champaign
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In article <1996Jan02.133346.2179@kth.se>, aramirez@kth.se (Aiko Ramírez) writes:
> Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him.

If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack!

-- 
=== Marta Moreno ===
Dept of Electrical Engineering, University of Illinois Urbana-Champaign
"We don't sign stars. We build them."