From mrobertson@u-tokyo.ac.jp Fri Mar 08 01:46:39 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!mrobertson From: mrobertson@u-tokyo.ac.jp (Matthias Robertson) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar08.014639.7031@u-tokyo.ac.jp> Date: Fri, 08 Mar 1996 01:46:39 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 11 Hardware disassembly report for Motorola hardware hackers. 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? -- Matthias Robertson US Robotics Courier V.34 @ 33,600 bps "Do not worship the copy." From dsanchez@clari.net Fri Mar 08 07:31:39 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!dsanchez From: dsanchez@clari.net (Dave Sánchez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar08.073139.8559@clari.net> Date: Fri, 08 Mar 1996 07:31:39 GMT References: <1996Mar08.014639.7031@u-tokyo.ac.jp> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Mar08.014639.7031@u-tokyo.ac.jp>, mrobertson@u-tokyo.ac.jp (Matthias Robertson) writes: > Hardware disassembly report for Motorola hardware hackers. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Dave Sánchez US Robotics Courier V.34 @ 14,400 bps "Row 14. No joke." From gmoreno@purdue.edu Sat Mar 09 21:15:39 1996 Path: ashpoly!cascade!brgate!saturno!purdue!gmoreno From: gmoreno@purdue.edu (Graham Moreno) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar09.211539.2037@purdue.edu> Date: Sat, 09 Mar 1996 21:15:39 GMT References: <1996Mar08.014639.7031@u-tokyo.ac.jp> <1996Mar08.073139.8559@clari.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Mar08.073139.8559@clari.net>, dsanchez@clari.net (Dave Sánchez) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Graham Moreno Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------