From cmoreno@berkeley.edu Fri May 13 20:04:27 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!cmoreno From: cmoreno@berkeley.edu (Camila Moreno) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994May13.200427.3137@berkeley.edu> Date: Fri, 13 May 1994 20:04:27 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu 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. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- === Camila Moreno === Dept of Electrical Engineering, UC Berkeley Department of EECS "The hatch is open. Is anyone listening?" From rvasiliev@ox.ac.uk Sun May 15 02:37:27 1994 Path: ashpoly!cascade!bigsur!ox!rvasiliev From: rvasiliev@ox.ac.uk (Renata Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994May15.023727.2271@ox.ac.uk> Date: Sun, 15 May 1994 02:37:27 GMT References: <1994May13.200427.3137@berkeley.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 12 In article <1994May13.200427.3137@berkeley.edu>, cmoreno@berkeley.edu (Camila Moreno) writes: > 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. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Renata Vasiliev *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From amartinez@mindspring.com Mon May 16 06:25:27 1994 Path: ashpoly!cascade!brgate!saturno!mindspring!amartinez From: amartinez@mindspring.com (Andrei Martínez) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994May16.062527.9028@mindspring.com> Date: Mon, 16 May 1994 06:25:27 GMT References: <1994May13.200427.3137@berkeley.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1994May13.200427.3137@berkeley.edu>, cmoreno@berkeley.edu (Camila Moreno) writes: > 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. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! If you are posting from AOL, please read RFC 1036 before posting again. -- Andrei Martínez -- MindSpring Enterprises "They will send a copy in my place." From lnakamura@mindspring.com Tue May 17 07:26:27 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!lnakamura From: lnakamura@mindspring.com (Lucia Nakamura) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994May17.072627.3749@mindspring.com> Date: Tue, 17 May 1994 07:26:27 GMT References: <1994May13.200427.3137@berkeley.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994May13.200427.3137@berkeley.edu>, cmoreno@berkeley.edu (Camila Moreno) writes: > 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. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Lucia Nakamura SupraFAXModem 28.8 @ 19,200 bps "The hatch is open. Is anyone listening?" From aschneider@utexas.edu Wed May 18 19:04:27 1994 Path: ashpoly!cascade!brgate!saturno!utexas!aschneider From: aschneider@utexas.edu (Andrei Schneider) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994May18.190427.6427@utexas.edu> Date: Wed, 18 May 1994 19:04:27 GMT References: <1994May13.200427.3137@berkeley.edu> <1994May15.023727.2271@ox.ac.uk> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994May15.023727.2271@ox.ac.uk>, rvasiliev@ox.ac.uk (Renata Vasiliev) writes: > Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Andrei Schneider Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------