From elee@illinois.edu Wed Feb 22 14:40:32 1995
Path: ashpoly!cascade!bigsur!illinois!elee
From: elee@illinois.edu (Élodie Lee)
Newsgroups: comp.sys.m68k
Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Feb22.144032.8017@illinois.edu>
Date: Wed, 22 Feb 1995 14:40:32 GMT
Organization: University of Illinois Urbana-Champaign
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Hardware disassembly report for Motorola hardware hackers.

Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF.
The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle.

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

-- 
Élodie Lee | elee@illinois.edu
PGP Key fingerprint: 6546 9C17 8CDA F27B
"Keep the channels open."

From treyes@cmu.edu Fri Feb 24 07:08:32 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!cmu!treyes
From: treyes@cmu.edu (Tomas Reyes)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Feb24.070832.9055@cmu.edu>
Date: Fri, 24 Feb 1995 07:08:32 GMT
References: <1995Feb22.144032.8017@illinois.edu>
Organization: Carnegie Mellon University School of CS
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In article <1995Feb22.144032.8017@illinois.edu>, elee@illinois.edu (Élodie Lee) writes:
> Hardware disassembly report for Motorola hardware hackers.

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

-- 
=== Tomas Reyes ===
Dept of Electrical Engineering, Carnegie Mellon University School of CS
"Do not worship the copy."