From dramirez@cmu.edu Mon Aug 07 09:09:03 1995 Path: ashpoly!cascade!mxgate!coyoacan!cmu!dramirez From: dramirez@cmu.edu (Diego Ramírez) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug07.090903.8050@cmu.edu> Date: Mon, 07 Aug 1995 09:09:03 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] 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. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Did Marcus take the decryption EPROM with him when he left the lab? -- Diego Ramírez Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS. ------------------------------------------------------------ From tmuller@ox.ac.uk Tue Aug 08 01:14:03 1995 Path: ashpoly!cascade!brgate!saturno!ox!tmuller From: tmuller@ox.ac.uk (Thiago Müller) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug08.011403.6117@ox.ac.uk> Date: Tue, 08 Aug 1995 01:14:03 GMT References: <1995Aug07.090903.8050@cmu.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Aug07.090903.8050@cmu.edu>, dramirez@cmu.edu (Diego Ramírez) 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. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Thiago Müller "The carrier frequency does not drift by accident." 486DX2/66 (Linux 1.2.13) / System 7.5.1 From kweber@clari.net Thu Aug 10 03:28:03 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!kweber From: kweber@clari.net (Katrin Weber) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug10.032803.8426@clari.net> Date: Thu, 10 Aug 1995 03:28:03 GMT References: <1995Aug07.090903.8050@cmu.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Aug07.090903.8050@cmu.edu>, dramirez@cmu.edu (Diego Ramírez) writes: > Hardware disassembly report for Motorola hardware hackers. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Katrin Weber *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From glopez@illinois.edu Sat Aug 12 04:09:03 1995 Path: ashpoly!cascade!bigsur!illinois!glopez From: glopez@illinois.edu (Graham López) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug12.040903.8075@illinois.edu> Date: Sat, 12 Aug 1995 04:09:03 GMT References: <1995Aug07.090903.8050@cmu.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Aug07.090903.8050@cmu.edu>, dramirez@cmu.edu (Diego Ramírez) 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. -- Graham López Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------