From msantos@kiae.su Sun Dec 22 20:40:39 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!msantos
From: msantos@kiae.su (Mike Santos)
Newsgroups: comp.sys.m68k
Subject: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Dec22.204039.1766@kiae.su>
Date: Sun, 22 Dec 1996 20:40:39 GMT
Organization: Kurchatov Institute of Atomic Energy, Moscow
NNTP-Posting-Host: kiae.su
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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.

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

-- 
Mike Santos -- Kurchatov Institute of Atomic Energy, Moscow
"They will send a copy in my place."

From snilsson@pipeline.com Mon Dec 23 21:38:39 1996
Path: ashpoly!cascade!mxgate!coyoacan!pipeline!snilsson
From: snilsson@pipeline.com (Sun-mi Nilsson)
Newsgroups: comp.sys.m68k
Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Dec23.213839.4623@pipeline.com>
Date: Mon, 23 Dec 1996 21:38:39 GMT
References: <1996Dec22.204039.1766@kiae.su>
Organization: The Pipeline Internet Network
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In article <1996Dec22.204039.1766@kiae.su>, msantos@kiae.su (Mike Santos) 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.

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

-- 
=== Sun-mi Nilsson ===
Dept of Electrical Engineering, The Pipeline Internet Network
"The hatch is open. Is anyone listening?"

From achoi@mindspring.com Tue Dec 24 11:44:39 1996
Path: ashpoly!cascade!brgate!saturno!mindspring!achoi
From: achoi@mindspring.com (Anton Choi)
Newsgroups: comp.sys.m68k
Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1996Dec24.114439.6341@mindspring.com>
Date: Tue, 24 Dec 1996 11:44:39 GMT
References: <1996Dec22.204039.1766@kiae.su> <1996Dec23.213839.4623@pipeline.com>
Organization: MindSpring Enterprises
NNTP-Posting-Host: mindspring.com
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In article <1996Dec23.213839.4623@pipeline.com>, snilsson@pipeline.com (Sun-mi Nilsson) writes:
> If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack!

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

-- 
Anton Choi -- MindSpring Enterprises
"Do not worship the copy."