From noliveira@kth.se Thu Apr 20 16:17:45 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!noliveira From: noliveira@kth.se (Nadine Oliveira) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Apr20.161745.8417@kth.se> Date: Thu, 20 Apr 1995 16:17:45 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se 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? -- Nadine Oliveira Tape trading list upon request. SASE required for international mail. From dtakahashi@unam.mx Sat Apr 22 09:32:45 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!dtakahashi From: dtakahashi@unam.mx (Dave Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Apr22.093245.5325@unam.mx> Date: Sat, 22 Apr 1995 09:32:45 GMT References: <1995Apr20.161745.8417@kth.se> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Apr20.161745.8417@kth.se>, noliveira@kth.se (Nadine Oliveira) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Dave Takahashi Practical Peripherals 14.4 @ 28,800 bps "A soul is not exclusive to biology." From mgirard@kiae.su Sat Apr 22 12:51:45 1995 Path: ashpoly!cascade!brgate!saturno!kiae!mgirard From: mgirard@kiae.su (Mei Girard) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Apr22.125145.6104@kiae.su> Date: Sat, 22 Apr 1995 12:51:45 GMT References: <1995Apr20.161745.8417@kth.se> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Apr20.161745.8417@kth.se>, noliveira@kth.se (Nadine Oliveira) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Mei Girard Zyxel U-1496E @ 9600 Telebit bps "Tape doesn't lie at 02:14. Ears do." From fito@uni-hamburg.de Sun Apr 23 17:27:45 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!fito From: fito@uni-hamburg.de (Fiona Ito) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Apr23.172745.8132@uni-hamburg.de> Date: Sun, 23 Apr 1995 17:27:45 GMT References: <1995Apr20.161745.8417@kth.se> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr20.161745.8417@kth.se>, noliveira@kth.se (Nadine Oliveira) writes: > Hardware disassembly report for Motorola hardware hackers. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- === Fiona Ito === Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik "Hold for relay." From mreyes@mit.edu Mon Apr 24 20:06:45 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mit!mreyes From: mreyes@mit.edu (Mike Reyes) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Apr24.200645.3516@mit.edu> Date: Mon, 24 Apr 1995 20:06:45 GMT References: <1995Apr20.161745.8417@kth.se> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Apr20.161745.8417@kth.se>, noliveira@kth.se (Nadine Oliveira) writes: > Hardware disassembly report for Motorola hardware hackers. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! PGP Public key available via finger or upon request. -- Mike Reyes Tape trading list upon request. SASE required for international mail.