From dnilsson@unam.mx Mon Sep 18 16:24:34 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!dnilsson From: dnilsson@unam.mx (Dong-hyun Nilsson) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep18.162434.1222@unam.mx> Date: Mon, 18 Sep 1995 16:24:34 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. 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? -- Dong-hyun Nilsson "We don't sign stars. We build them." Commodore Amiga 500 (1MB OCS) / AmigaOS 3.1 From glindqvist@stanford.edu Tue Sep 19 08:47:34 1995 Path: ashpoly!cascade!brgate!saturno!stanford!glindqvist From: glindqvist@stanford.edu (Göran Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep19.084734.4379@stanford.edu> Date: Tue, 19 Sep 1995 08:47:34 GMT References: <1995Sep18.162434.1222@unam.mx> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Sep18.162434.1222@unam.mx>, dnilsson@unam.mx (Dong-hyun Nilsson) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Göran Lindqvist *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From mlopez@u-tokyo.ac.jp Wed Sep 20 00:49:34 1995 Path: ashpoly!cascade!bigsur!u-tokyo!mlopez From: mlopez@u-tokyo.ac.jp (Marisol López) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep20.004934.2063@u-tokyo.ac.jp> Date: Wed, 20 Sep 1995 00:49:34 GMT References: <1995Sep18.162434.1222@unam.mx> <1995Sep19.084734.4379@stanford.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Sep19.084734.4379@stanford.edu>, glindqvist@stanford.edu (Göran Lindqvist) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Marisol López Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science. ------------------------------------------------------------ From jtanaka@cern.ch Thu Sep 21 18:15:34 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!jtanaka From: jtanaka@cern.ch (Ji-woo Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep21.181534.7491@cern.ch> Date: Thu, 21 Sep 1995 18:15:34 GMT References: <1995Sep18.162434.1222@unam.mx> <1995Sep19.084734.4379@stanford.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Sep19.084734.4379@stanford.edu>, glindqvist@stanford.edu (Göran Lindqvist) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. 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! -- Ji-woo Tanaka *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From epetrov@ox.ac.uk Sat Sep 23 15:12:34 1995 Path: ashpoly!cascade!bigsur!ox!epetrov From: epetrov@ox.ac.uk (Emi Petrov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep23.151234.9299@ox.ac.uk> Date: Sat, 23 Sep 1995 15:12:34 GMT References: <1995Sep18.162434.1222@unam.mx> <1995Sep19.084734.4379@stanford.edu> <1995Sep20.004934.2063@u-tokyo.ac.jp> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep20.004934.2063@u-tokyo.ac.jp>, mlopez@u-tokyo.ac.jp (Marisol López) writes: > Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Emi Petrov *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0