From ntakahashi@uni-hamburg.de Mon Jun 26 12:48:54 1995 Path: ashpoly!cascade!bigsur!uni-hamburg!ntakahashi From: ntakahashi@uni-hamburg.de (Nadia Takahashi) Newsgroups: comp.sys.m68k Subject: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jun26.124854.7392@uni-hamburg.de> Date: Mon, 26 Jun 1995 12:48:54 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. 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? -- Nadia Takahashi *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From mkang@utexas.edu Wed Jun 28 10:44:54 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!mkang From: mkang@utexas.edu (Morag Kang) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jun28.104454.2509@utexas.edu> Date: Wed, 28 Jun 1995 10:44:54 GMT References: <1995Jun26.124854.7392@uni-hamburg.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Jun26.124854.7392@uni-hamburg.de>, ntakahashi@uni-hamburg.de (Nadia Takahashi) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. > 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- === Morag Kang === Dept of Electrical Engineering, University of Texas at Austin "5 sigma is a discovery. 7 is a question." From tkang@earthlink.net Thu Jun 29 20:32:54 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!tkang From: tkang@earthlink.net (Tomas Kang) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jun29.203254.8916@earthlink.net> Date: Thu, 29 Jun 1995 20:32:54 GMT References: <1995Jun26.124854.7392@uni-hamburg.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jun26.124854.7392@uni-hamburg.de>, ntakahashi@uni-hamburg.de (Nadia Takahashi) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Tomas Kang "The hatch is open. Is anyone listening?" NeXTstation Turbo Color / FreeBSD 2.1