From shernandez@berkeley.edu Sun Jul 17 22:56:35 1994 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!shernandez From: shernandez@berkeley.edu (Steve Hernández) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul17.225635.5850@berkeley.edu> Date: Sun, 17 Jul 1994 22:56:35 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. 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'? -- Steve Hernández "They will send a copy in my place." Decstation 5000/200 / NEXTSTEP 3.3 From msilva@u-tokyo.ac.jp Tue Jul 19 02:43:35 1994 Path: ashpoly!cascade!bigsur!u-tokyo!msilva From: msilva@u-tokyo.ac.jp (Marta Silva) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul19.024335.6602@u-tokyo.ac.jp> Date: Tue, 19 Jul 1994 02:43:35 GMT References: <1994Jul17.225635.5850@berkeley.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jul17.225635.5850@berkeley.edu>, shernandez@berkeley.edu (Steve Hernández) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Marta Silva "The carrier frequency does not drift by accident." Sun SparcStation 20 / Linux 1.2.13 From jsouza@hanse.de Wed Jul 20 11:40:35 1994 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!jsouza From: jsouza@hanse.de (Jens Souza) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul20.114035.7559@hanse.de> Date: Wed, 20 Jul 1994 11:40:35 GMT References: <1994Jul17.225635.5850@berkeley.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jul17.225635.5850@berkeley.edu>, shernandez@berkeley.edu (Steve Hernández) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Jens Souza | jsouza@hanse.de PGP Key fingerprint: 5FAE 8D0B B353 5F89 "Keep the channels open."