From lhernandez@pacbell.net Tue Nov 01 00:23:18 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!lhernandez
From: lhernandez@pacbell.net (Lisa Hernández)
Newsgroups: comp.sys.m68k
Subject: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Nov01.002318.2254@pacbell.net>
Date: Tue, 01 Nov 1994 00:23:18 GMT
Organization: Pacific Bell Internet Services
NNTP-Posting-Host: pacbell.net
X-Newsreader: Netscape 1.1N
Lines: 10

Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.

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

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

-- 
Lisa Hernández -- Pacific Bell Internet Services
"Row 14. No joke."

From hito@kiae.su Tue Nov 01 07:33:18 1994
Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!hito
From: hito@kiae.su (Hana Ito)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Nov01.073318.4388@kiae.su>
Date: Tue, 01 Nov 1994 07:33:18 GMT
References: <1994Nov01.002318.2254@pacbell.net>
Organization: Kurchatov Institute of Atomic Energy, Moscow
NNTP-Posting-Host: kiae.su
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In article <1994Nov01.002318.2254@pacbell.net>, lhernandez@pacbell.net (Lisa Hernández) writes:
> Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.
> The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle.

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

-- 
Hana Ito
Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow.
------------------------------------------------------------

From givanov@uu.net Tue Nov 01 17:58:18 1994
Path: ashpoly!cascade!transat!ukc!fennimore!uu!givanov
From: givanov@uu.net (Graham Ivanov)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Nov01.175818.3271@uu.net>
Date: Tue, 01 Nov 1994 17:58:18 GMT
References: <1994Nov01.002318.2254@pacbell.net> <1994Nov01.073318.4388@kiae.su>
Organization: UUNET Technologies, Falls Church VA
NNTP-Posting-Host: uu.net
X-Newsreader: TIN [version 1.2 PL2]
Lines: 11

In article <1994Nov01.073318.4388@kiae.su>, hito@kiae.su (Hana Ito) writes:
> That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys.

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

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
=== Graham Ivanov ===
Dept of Electrical Engineering, UUNET Technologies, Falls Church VA
"A soul is not exclusive to biology."