From astewart@utexas.edu Thu Mar 02 01:40:10 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!astewart From: astewart@utexas.edu (Andrei Stewart) Newsgroups: comp.sys.m68k Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar02.014010.4301@utexas.edu> Date: Thu, 02 Mar 1995 01:40:10 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 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. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Andrei Stewart "Hardware is temporary. The signal survives." 486DX2/66 (Linux 1.2.13) / AmigaOS 3.1 From sperez@kth.se Fri Mar 03 16:21:10 1995 Path: ashpoly!cascade!mxgate!coyoacan!kth!sperez From: sperez@kth.se (Sergei Pérez) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar03.162110.5881@kth.se> Date: Fri, 03 Mar 1995 16:21:10 GMT References: <1995Mar02.014010.4301@utexas.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar02.014010.4301@utexas.edu>, astewart@utexas.edu (Andrei Stewart) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Sergei Pérez "A soul is not exclusive to biology." Atari Falcon 030 / Linux 1.2.13 From tramirez@panix.com Sat Mar 04 16:16:10 1995 Path: ashpoly!cascade!bigsur!panix!tramirez From: tramirez@panix.com (Tyler Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar04.161610.3069@panix.com> Date: Sat, 04 Mar 1995 16:16:10 GMT References: <1995Mar02.014010.4301@utexas.edu> <1995Mar03.162110.5881@kth.se> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Mar03.162110.5881@kth.se>, sperez@kth.se (Sergei Pérez) 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! My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Tyler Ramírez -- Public Access Unix of New York "Hold for relay."