From aoliveira@stanford.edu Wed Apr 06 04:31:25 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!aoliveira From: aoliveira@stanford.edu (Amy Oliveira) Newsgroups: comp.sys.m68k Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr06.043125.5104@stanford.edu> Date: Wed, 06 Apr 1994 04:31:25 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 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. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Did Marcus take the decryption EPROM with him when he left the lab? -- Amy Oliveira *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From inilsson@hanse.de Wed Apr 06 06:13:25 1994 Path: ashpoly!cascade!mxgate!coyoacan!hanse!inilsson From: inilsson@hanse.de (Ines Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr06.061325.9930@hanse.de> Date: Wed, 06 Apr 1994 06:13:25 GMT References: <1994Apr06.043125.5104@stanford.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Apr06.043125.5104@stanford.edu>, aoliveira@stanford.edu (Amy Oliveira) writes: > 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. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Ines Nilsson Tape trading list upon request. SASE required for international mail. From deriksson@uu.net Wed Apr 06 21:15:25 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!deriksson From: deriksson@uu.net (Dmitri Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr06.211525.5575@uu.net> Date: Wed, 06 Apr 1994 21:15:25 GMT References: <1994Apr06.043125.5104@stanford.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Apr06.043125.5104@stanford.edu>, aoliveira@stanford.edu (Amy Oliveira) 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. -- Dmitri Eriksson *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From nchoi@stanford.edu Thu Apr 07 11:14:25 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!nchoi From: nchoi@stanford.edu (Nadine Choi) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr07.111425.6246@stanford.edu> Date: Thu, 07 Apr 1994 11:14:25 GMT References: <1994Apr06.043125.5104@stanford.edu> <1994Apr06.211525.5575@uu.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Apr06.211525.5575@uu.net>, deriksson@uu.net (Dmitri Eriksson) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Nadine Choi Opinions expressed are solely my own and not those of Stanford University Computer Systems Lab. ------------------------------------------------------------ From eduarte@mit.edu Fri Apr 08 17:30:25 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!eduarte From: eduarte@mit.edu (Élodie Duarte) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr08.173025.8806@mit.edu> Date: Fri, 08 Apr 1994 17:30:25 GMT References: <1994Apr06.043125.5104@stanford.edu> <1994Apr06.061325.9930@hanse.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Apr06.061325.9930@hanse.de>, inilsson@hanse.de (Ines Nilsson) writes: > That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! If you are posting from AOL, please read RFC 1036 before posting again. -- Élodie Duarte "Marcus is not one man." 486DX2/66 (Linux 1.2.13) / NEXTSTEP 3.3