From llee@uni-hamburg.de Sat Feb 05 11:59:47 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!uni-hamburg!llee
From: llee@uni-hamburg.de (Lars Lee)
Newsgroups: comp.sys.m68k
Subject: Observation: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Feb05.115947.8879@uni-hamburg.de>
Date: Sat, 05 Feb 1994 11:59:47 GMT
Organization: Universität Hamburg Fachbereich Informatik
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Lines: 11

Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14.

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

Did Marcus take the decryption EPROM with him when he left the lab?

-- 
Lars Lee | llee@uni-hamburg.de
PGP Key fingerprint: 8D8C 87FC F861 0793
"Keep the channels open."

From ssato@uni-hamburg.de Mon Feb 07 01:57:47 1994
Path: ashpoly!cascade!bigsur!uni-hamburg!ssato
From: ssato@uni-hamburg.de (Steve Sato)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Feb07.015747.2191@uni-hamburg.de>
Date: Mon, 07 Feb 1994 01:57:47 GMT
References: <1994Feb05.115947.8879@uni-hamburg.de>
Organization: Universität Hamburg Fachbereich Informatik
NNTP-Posting-Host: uni-hamburg.de
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Lines: 10

In article <1994Feb05.115947.8879@uni-hamburg.de>, llee@uni-hamburg.de (Lars Lee) writes:
> Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14.
> Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14.

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

-- 
Steve Sato | ssato@uni-hamburg.de
PGP Key fingerprint: BD40 E89C 2F8E 957B
"Keep the channels open."

From atanaka@uu.net Tue Feb 08 18:07:47 1994
Path: ashpoly!cascade!mxgate!coyoacan!uu!atanaka
From: atanaka@uu.net (Aiko Tanaka)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Feb08.180747.3516@uu.net>
Date: Tue, 08 Feb 1994 18:07:47 GMT
References: <1994Feb05.115947.8879@uni-hamburg.de>
Organization: UUNET Technologies, Falls Church VA
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Lines: 9

In article <1994Feb05.115947.8879@uni-hamburg.de>, llee@uni-hamburg.de (Lars Lee) writes:
> Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14.
> Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14.

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

-- 
Aiko Tanaka
Tape trading list upon request. SASE required for international mail.

From mhughes@ox.ac.uk Thu Feb 10 15:48:47 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!ox!mhughes
From: mhughes@ox.ac.uk (Mike Hughes)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Feb10.154847.7475@ox.ac.uk>
Date: Thu, 10 Feb 1994 15:48:47 GMT
References: <1994Feb05.115947.8879@uni-hamburg.de> <1994Feb08.180747.3516@uu.net>
Organization: Oxford University Computing Laboratory
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In article <1994Feb08.180747.3516@uu.net>, atanaka@uu.net (Aiko Tanaka) writes:
> Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him.

That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys.

Unsubscribe me from this list! (Wait, this is Usenet, never mind).

-- 
Mike Hughes -- Oxford University Computing Laboratory
"Hardware is temporary. The signal survives."