From mweber@pipeline.com Mon Dec 02 17:47:34 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!mweber From: mweber@pipeline.com (Mateo Weber) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec02.174734.3419@pipeline.com> Date: Mon, 02 Dec 1996 17:47:34 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Mateo Weber Tape trading list upon request. SASE required for international mail. From asantos@utexas.edu Wed Dec 04 09:27:34 1996 Path: ashpoly!cascade!brgate!saturno!utexas!asantos From: asantos@utexas.edu (Andrei Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec04.092734.2621@utexas.edu> Date: Wed, 04 Dec 1996 09:27:34 GMT References: <1996Dec02.174734.3419@pipeline.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1996Dec02.174734.3419@pipeline.com>, mweber@pipeline.com (Mateo Weber) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. > 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Andrei Santos US Robotics Courier V.34 @ 28,800 bps "5 sigma is a discovery. 7 is a question." From csmirnov@kiae.su Wed Dec 04 12:04:34 1996 Path: ashpoly!cascade!brgate!saturno!kiae!csmirnov From: csmirnov@kiae.su (Callum Smirnov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec04.120434.8004@kiae.su> Date: Wed, 04 Dec 1996 12:04:34 GMT References: <1996Dec02.174734.3419@pipeline.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Dec02.174734.3419@pipeline.com>, mweber@pipeline.com (Mateo Weber) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Callum Smirnov Tape trading list upon request. SASE required for international mail. From csantos@netcom.com Thu Dec 05 23:55:34 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!csantos From: csantos@netcom.com (Callum Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec05.235534.4319@netcom.com> Date: Thu, 05 Dec 1996 23:55:34 GMT References: <1996Dec02.174734.3419@pipeline.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Dec02.174734.3419@pipeline.com>, mweber@pipeline.com (Mateo Weber) 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. -- Callum Santos -- NETCOM On-Line Communication Services "The carrier frequency does not drift by accident." From fsokolov@ox.ac.uk Fri Dec 06 06:04:34 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!fsokolov From: fsokolov@ox.ac.uk (Freya Sokolov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec06.060434.4199@ox.ac.uk> Date: Fri, 06 Dec 1996 06:04:34 GMT References: <1996Dec02.174734.3419@pipeline.com> <1996Dec04.092734.2621@utexas.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Dec04.092734.2621@utexas.edu>, asantos@utexas.edu (Andrei Santos) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Freya Sokolov Tape trading list upon request. SASE required for international mail.