From skang@ox.ac.uk Fri Jan 13 12:05:59 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!ox!skang From: skang@ox.ac.uk (Steve Kang) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan13.120559.6170@ox.ac.uk> Date: Fri, 13 Jan 1995 12:05:59 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk 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. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- === Steve Kang === Dept of Electrical Engineering, Oxford University Computing Laboratory "Hardware is temporary. The signal survives." From lfischer@cmu.edu Sat Jan 14 20:24:59 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cmu!lfischer From: lfischer@cmu.edu (Lucia Fischer) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan14.202459.8566@cmu.edu> Date: Sat, 14 Jan 1995 20:24:59 GMT References: <1995Jan13.120559.6170@ox.ac.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Jan13.120559.6170@ox.ac.uk>, skang@ox.ac.uk (Steve Kang) 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. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Lucia Fischer | lfischer@cmu.edu PGP Key fingerprint: B9D2 0B3A 537A 303A "Keep the channels open." From aweber@mindspring.com Mon Jan 16 15:17:59 1995 Path: ashpoly!cascade!bigsur!mindspring!aweber From: aweber@mindspring.com (Anton Weber) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan16.151759.5114@mindspring.com> Date: Mon, 16 Jan 1995 15:17:59 GMT References: <1995Jan13.120559.6170@ox.ac.uk> <1995Jan14.202459.8566@cmu.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jan14.202459.8566@cmu.edu>, lfischer@cmu.edu (Lucia Fischer) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- === Anton Weber === Dept of Electrical Engineering, MindSpring Enterprises "Marcus is not one man." From msantos@pipeline.com Tue Jan 17 17:32:59 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!msantos From: msantos@pipeline.com (Marisol Santos) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan17.173259.3693@pipeline.com> Date: Tue, 17 Jan 1995 17:32:59 GMT References: <1995Jan13.120559.6170@ox.ac.uk> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Jan13.120559.6170@ox.ac.uk>, skang@ox.ac.uk (Steve Kang) 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. -- Marisol Santos Tape trading list upon request. SASE required for international mail. From jduarte@hanse.de Thu Jan 19 08:54:59 1995 Path: ashpoly!cascade!bigsur!hanse!jduarte From: jduarte@hanse.de (Jens Duarte) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan19.085459.4139@hanse.de> Date: Thu, 19 Jan 1995 08:54:59 GMT References: <1995Jan13.120559.6170@ox.ac.uk> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jan13.120559.6170@ox.ac.uk>, skang@ox.ac.uk (Steve Kang) 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. -- Jens Duarte "Hold for relay." Sun 3/60 (SunOS 4.1.1) / SunOS 4.1.4