From asmirnov@hanse.de Tue Mar 19 10:01:50 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!hanse!asmirnov From: asmirnov@hanse.de (Andrei Smirnov) Newsgroups: comp.sys.m68k Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar19.100150.4641@hanse.de> Date: Tue, 19 Mar 1996 10:01:50 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. 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. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Andrei Smirnov Tape trading list upon request. SASE required for international mail. From kramirez@cam.ac.uk Tue Mar 19 22:59:50 1996 Path: ashpoly!cascade!brgate!saturno!cam!kramirez From: kramirez@cam.ac.uk (Katrin Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar19.225950.8576@cam.ac.uk> Date: Tue, 19 Mar 1996 22:59:50 GMT References: <1996Mar19.100150.4641@hanse.de> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Mar19.100150.4641@hanse.de>, asmirnov@hanse.de (Andrei Smirnov) 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 Ramírez Practical Peripherals 14.4 @ 9600 Telebit bps "Marcus is not one man." From psuzuki@pacbell.net Thu Mar 21 09:48:50 1996 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!psuzuki From: psuzuki@pacbell.net (Pavel Suzuki) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar21.094850.1846@pacbell.net> Date: Thu, 21 Mar 1996 09:48:50 GMT References: <1996Mar19.100150.4641@hanse.de> <1996Mar19.225950.8576@cam.ac.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Mar19.225950.8576@cam.ac.uk>, kramirez@cam.ac.uk (Katrin Ramírez) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Pavel Suzuki -- Pacific Bell Internet Services "We don't sign stars. We build them."