From ocampbell@tum.de Thu Mar 16 00:13:07 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!ocampbell From: ocampbell@tum.de (Olga Campbell) Newsgroups: comp.sys.m68k Subject: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar16.001307.7456@tum.de> Date: Thu, 16 Mar 1995 00:13:07 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de 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'? -- Olga Campbell Hayes Optima 288 @ 19,200 bps "The carrier frequency does not drift by accident." From srodriguez@purdue.edu Fri Mar 17 11:49:07 1995 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!srodriguez From: srodriguez@purdue.edu (Sergei Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar17.114907.7375@purdue.edu> Date: Fri, 17 Mar 1995 11:49:07 GMT References: <1995Mar16.001307.7456@tum.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Mar16.001307.7456@tum.de>, ocampbell@tum.de (Olga Campbell) 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. -- Sergei Rodríguez -- Purdue University Engineering Computer Network "A soul is not exclusive to biology." From mreyes@stanford.edu Sun Mar 19 00:29:07 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!mreyes From: mreyes@stanford.edu (Mateo Reyes) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar19.002907.2355@stanford.edu> Date: Sun, 19 Mar 1995 00:29:07 GMT References: <1995Mar16.001307.7456@tum.de> <1995Mar17.114907.7375@purdue.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Mar17.114907.7375@purdue.edu>, srodriguez@purdue.edu (Sergei Rodríguez) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Mateo Reyes | mreyes@stanford.edu PGP Key fingerprint: 1FEB A0D3 623B B943 "Keep the channels open."