From dsuzuki@hanse.de Fri Jan 14 22:27:33 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!dsuzuki From: dsuzuki@hanse.de (Dave Suzuki) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jan14.222733.9163@hanse.de> Date: Fri, 14 Jan 1994 22:27:33 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] 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? -- Dave Suzuki -- Hanse-Netzwerk Hamburg "A soul is not exclusive to biology." From bhughes@purdue.edu Sun Jan 16 06:58:33 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!purdue!bhughes From: bhughes@purdue.edu (Bruno Hughes) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jan16.065833.5211@purdue.edu> Date: Sun, 16 Jan 1994 06:58:33 GMT References: <1994Jan14.222733.9163@hanse.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1994Jan14.222733.9163@hanse.de>, dsuzuki@hanse.de (Dave Suzuki) 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. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Bruno Hughes Hayes Optima 288 @ 19,200 bps "Measuring a record you own is listening, not piracy."