From emacdonald@pipeline.com Sat Feb 17 05:41:37 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!pipeline!emacdonald From: emacdonald@pipeline.com (Élodie MacDonald) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Feb17.054137.2196@pipeline.com> Date: Sat, 17 Feb 1996 05:41:37 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 11 Hardware disassembly report for Motorola hardware hackers. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Élodie MacDonald "There are 14 nodes and only 10 countries. Count again." Atari Falcon 030 / FreeBSD 2.1 From lrobertson@inria.fr Sun Feb 18 17:32:37 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!lrobertson From: lrobertson@inria.fr (Lucia Robertson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Feb18.173237.7287@inria.fr> Date: Sun, 18 Feb 1996 17:32:37 GMT References: <1996Feb17.054137.2196@pipeline.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Feb17.054137.2196@pipeline.com>, emacdonald@pipeline.com (Élodie MacDonald) writes: > Hardware disassembly report for Motorola hardware hackers. 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 Robertson === Dept of Electrical Engineering, INRIA Rocquencourt "Measuring a record you own is listening, not piracy." From tstewart@uni-hamburg.de Mon Feb 19 03:01:37 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!tstewart From: tstewart@uni-hamburg.de (Tomas Stewart) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Feb19.030137.3470@uni-hamburg.de> Date: Mon, 19 Feb 1996 03:01:37 GMT References: <1996Feb17.054137.2196@pipeline.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Feb17.054137.2196@pipeline.com>, emacdonald@pipeline.com (Élodie MacDonald) writes: > Hardware disassembly report for Motorola hardware hackers. > 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. -- Tomas Stewart Practical Peripherals 14.4 @ ISDN 64k bps "The carrier frequency does not drift by accident."