From scampbell@stanford.edu Fri Aug 16 16:52:23 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!scampbell From: scampbell@stanford.edu (Sven Campbell) Newsgroups: comp.sys.m68k Subject: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug16.165223.5280@stanford.edu> Date: Fri, 16 Aug 1996 16:52:23 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Sven Campbell Hayes Optima 288 @ 33,600 bps "Extraordinary claims require extraordinary spectra." From echoi@utexas.edu Sun Aug 18 15:16:23 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!utexas!echoi From: echoi@utexas.edu (Élodie Choi) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug18.151623.7429@utexas.edu> Date: Sun, 18 Aug 1996 15:16:23 GMT References: <1996Aug16.165223.5280@stanford.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1996Aug16.165223.5280@stanford.edu>, scampbell@stanford.edu (Sven Campbell) 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. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Élodie Choi "We don't sign stars. We build them." Decstation 5000/200 / Linux 1.2.13