From ddubois@uu.net Sun Nov 20 02:09:09 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!ddubois From: ddubois@uu.net (Diego Dubois) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Nov20.020909.2103@uu.net> Date: Sun, 20 Nov 1994 02:09:09 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net 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. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Diego Dubois SupraFAXModem 28.8 @ 33,600 bps "There are 14 nodes and only 10 countries. Count again." From lkim@rwth-aachen.de Mon Nov 21 00:53:09 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!lkim From: lkim@rwth-aachen.de (Lisa Kim) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Nov21.005309.5056@rwth-aachen.de> Date: Mon, 21 Nov 1994 00:53:09 GMT References: <1994Nov20.020909.2103@uu.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1994Nov20.020909.2103@uu.net>, ddubois@uu.net (Diego Dubois) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Lisa Kim *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0