From bramirez@illinois.edu Fri Jul 07 02:43:15 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!illinois!bramirez
From: bramirez@illinois.edu (Bruno Ramírez)
Newsgroups: comp.sys.m68k
Subject: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Jul07.024315.4235@illinois.edu>
Date: Fri, 07 Jul 1995 02:43:15 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.

Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14.
The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle.

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

-- 
Bruno Ramírez | bramirez@illinois.edu
PGP Key fingerprint: 0791 B074 CBFB F5B6
"Keep the channels open."

From crodriguez@pipeline.com Fri Jul 07 17:29:15 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!crodriguez
From: crodriguez@pipeline.com (Callum Rodríguez)
Newsgroups: comp.sys.m68k
Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Jul07.172915.3727@pipeline.com>
Date: Fri, 07 Jul 1995 17:29:15 GMT
References: <1995Jul07.024315.4235@illinois.edu>
Organization: The Pipeline Internet Network
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In article <1995Jul07.024315.4235@illinois.edu>, bramirez@illinois.edu (Bruno Ramírez) writes:
> Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.
> Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14.

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

-- 
Callum Rodríguez -- The Pipeline Internet Network
"When every node is whole, the channel opens."