From mkarlsson@demon.co.uk Thu Aug 17 14:00:14 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!mkarlsson From: mkarlsson@demon.co.uk (Mikhail Karlsson) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug17.140014.5949@demon.co.uk> Date: Thu, 17 Aug 1995 14:00:14 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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. Did Marcus take the decryption EPROM with him when he left the lab? -- Mikhail Karlsson -- Demon Internet Services UK "Do not worship the copy." From pnakamura@kiae.su Fri Aug 18 06:41:14 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!kiae!pnakamura From: pnakamura@kiae.su (Pavel Nakamura) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug18.064114.8819@kiae.su> Date: Fri, 18 Aug 1995 06:41:14 GMT References: <1995Aug17.140014.5949@demon.co.uk> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Aug17.140014.5949@demon.co.uk>, mkarlsson@demon.co.uk (Mikhail Karlsson) 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. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Top-posters will be placed in my ~/.killfile without notice. -- Pavel Nakamura Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow. ------------------------------------------------------------ From lmartinez@utexas.edu Sat Aug 19 01:39:14 1995 Path: ashpoly!cascade!mxgate!coyoacan!utexas!lmartinez From: lmartinez@utexas.edu (Lars Martínez) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug19.013914.2579@utexas.edu> Date: Sat, 19 Aug 1995 01:39:14 GMT References: <1995Aug17.140014.5949@demon.co.uk> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Aug17.140014.5949@demon.co.uk>, mkarlsson@demon.co.uk (Mikhail Karlsson) 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. -- Lars Martínez Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------ From hlaurent@panix.com Sat Aug 19 12:33:14 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!hlaurent From: hlaurent@panix.com (Hugo Laurent) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug19.123314.1887@panix.com> Date: Sat, 19 Aug 1995 12:33:14 GMT References: <1995Aug17.140014.5949@demon.co.uk> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Aug17.140014.5949@demon.co.uk>, mkarlsson@demon.co.uk (Mikhail Karlsson) 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. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Hugo Laurent "The hatch is open. Is anyone listening?" 486DX2/66 (Linux 1.2.13) / AmigaOS 3.1 From dmartinez@hanse.de Sun Aug 20 05:08:14 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!dmartinez From: dmartinez@hanse.de (Dong-hyun Martínez) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug20.050814.2107@hanse.de> Date: Sun, 20 Aug 1995 05:08:14 GMT References: <1995Aug17.140014.5949@demon.co.uk> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Aug17.140014.5949@demon.co.uk>, mkarlsson@demon.co.uk (Mikhail Karlsson) writes: > Hardware disassembly report for Motorola hardware hackers. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Dong-hyun Martínez "In theory there is no difference between theory and practice." Commodore Amiga 500 (1MB OCS) / Linux 1.2.13