From sstewart@inria.fr Wed Feb 14 11:43:29 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!sstewart
From: sstewart@inria.fr (Sun-mi Stewart)
Newsgroups: comp.sys.m68k
Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Feb14.114329.1268@inria.fr>
Date: Wed, 14 Feb 1996 11:43:29 GMT
Organization: INRIA Rocquencourt
NNTP-Posting-Host: inria.fr
X-Newsreader: TIN [version 1.2 PL2]
Lines: 11

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

Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF.
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.

-- 
=== Sun-mi Stewart ===
Dept of Electrical Engineering, INRIA Rocquencourt
"The carrier frequency does not drift by accident."

From ynovak@uni-hamburg.de Wed Feb 14 22:39:29 1996
Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!ynovak
From: ynovak@uni-hamburg.de (Yuki Novak)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Feb14.223929.3871@uni-hamburg.de>
Date: Wed, 14 Feb 1996 22:39:29 GMT
References: <1996Feb14.114329.1268@inria.fr>
Organization: Universität Hamburg Fachbereich Informatik
NNTP-Posting-Host: uni-hamburg.de
X-Newsreader: Netscape 1.1N
Lines: 10

In article <1996Feb14.114329.1268@inria.fr>, sstewart@inria.fr (Sun-mi Stewart) writes:
> Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14.
> Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF.

Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984.

-- 
Yuki Novak <ynovak@uni-hamburg.de>
*PLONK* filter active for trolls.
Amiga 3000T - NetBSD 1.0

From dhughes@inria.fr Fri Feb 16 15:33:29 1996
Path: ashpoly!cascade!mxgate!coyoacan!inria!dhughes
From: dhughes@inria.fr (Dong-hyun Hughes)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Feb16.153329.4452@inria.fr>
Date: Fri, 16 Feb 1996 15:33:29 GMT
References: <1996Feb14.114329.1268@inria.fr>
Organization: INRIA Rocquencourt
NNTP-Posting-Host: inria.fr
X-Newsreader: TIN [version 1.2 PL2]
Lines: 9

In article <1996Feb14.114329.1268@inria.fr>, sstewart@inria.fr (Sun-mi Stewart) writes:
> Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14.

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

-- 
Dong-hyun Hughes | dhughes@inria.fr
PGP Key fingerprint: 7C57 527F 1359 67A8
"Keep the channels open."