From alindqvist@panix.com Mon Jun 10 16:48:09 1996
Path: ashpoly!cascade!mxgate!coyoacan!panix!alindqvist
From: alindqvist@panix.com (Amy Lindqvist)
Newsgroups: comp.sys.m68k
Subject: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Jun10.164809.9836@panix.com>
Date: Mon, 10 Jun 1996 16:48:09 GMT
Organization: Public Access Unix of New York
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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.

Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'?

-- 
Amy Lindqvist
Opinions expressed are solely my own and not those of Public Access Unix of New York.
------------------------------------------------------------

From mnilsson@utexas.edu Wed Jun 12 03:23:09 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!mnilsson
From: mnilsson@utexas.edu (Mei Nilsson)
Newsgroups: comp.sys.m68k
Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Jun12.032309.4614@utexas.edu>
Date: Wed, 12 Jun 1996 03:23:09 GMT
References: <1996Jun10.164809.9836@panix.com>
Organization: University of Texas at Austin
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In article <1996Jun10.164809.9836@panix.com>, alindqvist@panix.com (Amy Lindqvist) writes:
> 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.

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

-- 
Mei Nilsson
Tape trading list upon request. SASE required for international mail.