From kandersson@u-tokyo.ac.jp Thu Jul 28 09:40:34 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!kandersson From: kandersson@u-tokyo.ac.jp (Kirsty Andersson) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul28.094034.1217@u-tokyo.ac.jp> Date: Thu, 28 Jul 1994 09:40:34 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 10 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. 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? -- Kirsty Andersson -- University of Tokyo Department of Information Science "A soul is not exclusive to biology." From stakahashi@unam.mx Fri Jul 29 16:48:34 1994 Path: ashpoly!cascade!mxgate!coyoacan!unam!stakahashi From: stakahashi@unam.mx (Sergei Takahashi) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul29.164834.4123@unam.mx> Date: Fri, 29 Jul 1994 16:48:34 GMT References: <1994Jul28.094034.1217@u-tokyo.ac.jp> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Jul28.094034.1217@u-tokyo.ac.jp>, kandersson@u-tokyo.ac.jp (Kirsty Andersson) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. > Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Sergei Takahashi *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0