From emoreau@illinois.edu Fri Feb 03 17:37:05 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!illinois!emoreau
From: emoreau@illinois.edu (Élodie Moreau)
Newsgroups: comp.sys.m68k
Subject: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Feb03.173705.3506@illinois.edu>
Date: Fri, 03 Feb 1995 17:37:05 GMT
Organization: University of Illinois Urbana-Champaign
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Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.

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.

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

-- 
Élodie Moreau
Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign.
------------------------------------------------------------

From htakahashi@berkeley.edu Sat Feb 04 03:49:05 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!berkeley!htakahashi
From: htakahashi@berkeley.edu (Hana Takahashi)
Newsgroups: comp.sys.m68k
Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Feb04.034905.8712@berkeley.edu>
Date: Sat, 04 Feb 1995 03:49:05 GMT
References: <1995Feb03.173705.3506@illinois.edu>
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In article <1995Feb03.173705.3506@illinois.edu>, emoreau@illinois.edu (Élodie Moreau) writes:
> Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.
> Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF.

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

-- 
Hana Takahashi
Tape trading list upon request. SASE required for international mail.

From dpetrov@cam.ac.uk Mon Feb 06 00:15:05 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!dpetrov
From: dpetrov@cam.ac.uk (Diego Petrov)
Newsgroups: comp.sys.m68k
Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Feb06.001505.1852@cam.ac.uk>
Date: Mon, 06 Feb 1995 00:15:05 GMT
References: <1995Feb03.173705.3506@illinois.edu>
Organization: University of Cambridge Computer Laboratory
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In article <1995Feb03.173705.3506@illinois.edu>, emoreau@illinois.edu (Élodie Moreau) writes:
> Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.

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

-- 
=== Diego Petrov ===
Dept of Electrical Engineering, University of Cambridge Computer Laboratory
"Measuring a record you own is listening, not piracy."