From geriksson@inria.fr Wed Mar 06 17:46:01 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!geriksson From: geriksson@inria.fr (Göran Eriksson) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar06.174601.7763@inria.fr> Date: Wed, 06 Mar 1996 17:46:01 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Göran Eriksson "In theory there is no difference between theory and practice." 486DX4/100 (FreeBSD 2.0.5) / System 7.5.1 From emoreno@stanford.edu Thu Mar 07 19:09:01 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!emoreno From: emoreno@stanford.edu (Emi Moreno) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Mar07.190901.9935@stanford.edu> Date: Thu, 07 Mar 1996 19:09:01 GMT References: <1996Mar06.174601.7763@inria.fr> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Mar06.174601.7763@inria.fr>, geriksson@inria.fr (Göran Eriksson) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. 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). -- Emi Moreno | emoreno@stanford.edu PGP Key fingerprint: A97C 10D3 A0DA F4A9 "Keep the channels open."