From mgarcia@unam.mx Wed Feb 01 05:46:17 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!unam!mgarcia From: mgarcia@unam.mx (Mateo García) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Feb01.054617.7662@unam.mx> Date: Wed, 01 Feb 1995 05:46:17 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 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. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Mateo García "Row 14. No joke." 486DX4/100 (FreeBSD 2.0.5) / SunOS 4.1.4 From oivanov@cern.ch Thu Feb 02 02:39:17 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!oivanov From: oivanov@cern.ch (Olga Ivanov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Feb02.023917.4317@cern.ch> Date: Thu, 02 Feb 1995 02:39:17 GMT References: <1995Feb01.054617.7662@unam.mx> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Feb01.054617.7662@unam.mx>, mgarcia@unam.mx (Mateo García) 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. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Olga Ivanov Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva. ------------------------------------------------------------ From bgarcia@cern.ch Fri Feb 03 05:24:17 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!bgarcia From: bgarcia@cern.ch (Bruno García) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Feb03.052417.7467@cern.ch> Date: Fri, 03 Feb 1995 05:24:17 GMT References: <1995Feb01.054617.7662@unam.mx> <1995Feb02.023917.4317@cern.ch> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Feb02.023917.4317@cern.ch>, oivanov@cern.ch (Olga Ivanov) writes: > That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Bruno García Hayes Optima 288 @ 19,200 bps "Marcus is not one man."