From aeriksson@inria.fr Thu Mar 21 12:12:49 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!aeriksson From: aeriksson@inria.fr (Anja Eriksson) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar21.121249.3369@inria.fr> Date: Thu, 21 Mar 1996 12:12:49 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. 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. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Anja Eriksson *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From mduarte@utexas.edu Sat Mar 23 10:15:49 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!utexas!mduarte From: mduarte@utexas.edu (Min-jun Duarte) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar23.101549.7415@utexas.edu> Date: Sat, 23 Mar 1996 10:15:49 GMT References: <1996Mar21.121249.3369@inria.fr> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Mar21.121249.3369@inria.fr>, aeriksson@inria.fr (Anja Eriksson) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. > The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Min-jun Duarte Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------ From kreyes@cern.ch Sun Mar 24 01:10:49 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!kreyes From: kreyes@cern.ch (Katrin Reyes) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar24.011049.7434@cern.ch> Date: Sun, 24 Mar 1996 01:10:49 GMT References: <1996Mar21.121249.3369@inria.fr> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Mar21.121249.3369@inria.fr>, aeriksson@inria.fr (Anja Eriksson) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- === Katrin Reyes === Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva "5 sigma is a discovery. 7 is a question." From brobertson@delphi.com Sun Mar 24 01:56:49 1996 Path: ashpoly!cascade!mxgate!coyoacan!delphi!brobertson From: brobertson@delphi.com (Brian Robertson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar24.015649.3010@delphi.com> Date: Sun, 24 Mar 1996 01:56:49 GMT References: <1996Mar21.121249.3369@inria.fr> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Mar21.121249.3369@inria.fr>, aeriksson@inria.fr (Anja Eriksson) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Brian Robertson -- Delphi Internet Services "5 sigma is a discovery. 7 is a question."