From mnakamura@purdue.edu Tue Dec 05 06:14:18 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!purdue!mnakamura
From: mnakamura@purdue.edu (Marta Nakamura)
Newsgroups: comp.sys.m68k
Subject: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Dec05.061418.4817@purdue.edu>
Date: Tue, 05 Dec 1995 06:14:18 GMT
Organization: Purdue University Engineering Computer Network
NNTP-Posting-Host: purdue.edu
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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'?

-- 
Marta Nakamura <mnakamura@purdue.edu>
*PLONK* filter active for trolls.
PC-9821Ap2 (NEC) - NetBSD 1.0

From nsilva@uu.net Thu Dec 07 01:51:18 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!nsilva
From: nsilva@uu.net (Nadine Silva)
Newsgroups: comp.sys.m68k
Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Dec07.015118.5034@uu.net>
Date: Thu, 07 Dec 1995 01:51:18 GMT
References: <1995Dec05.061418.4817@purdue.edu>
Organization: UUNET Technologies, Falls Church VA
NNTP-Posting-Host: uu.net
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Lines: 8

In article <1995Dec05.061418.4817@purdue.edu>, mnakamura@purdue.edu (Marta Nakamura) writes:
> Hardware disassembly report for Motorola hardware hackers.

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

-- 
Nadine Silva -- UUNET Technologies, Falls Church VA
"Tape doesn't lie at 02:14. Ears do."

From mwatanabe@u-tokyo.ac.jp Fri Dec 08 18:43:18 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!mwatanabe
From: mwatanabe@u-tokyo.ac.jp (Marisol Watanabe)
Newsgroups: comp.sys.m68k
Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Dec08.184318.5280@u-tokyo.ac.jp>
Date: Fri, 08 Dec 1995 18:43:18 GMT
References: <1995Dec05.061418.4817@purdue.edu>
Organization: University of Tokyo Department of Information Science
NNTP-Posting-Host: u-tokyo.ac.jp
X-Newsreader: TIN [version 1.2 PL2]
Lines: 8

In article <1995Dec05.061418.4817@purdue.edu>, mnakamura@purdue.edu (Marta Nakamura) writes:
> Hardware disassembly report for Motorola hardware hackers.

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

-- 
Marisol Watanabe
Tape trading list upon request. SASE required for international mail.