From thughes@netcom.com Tue Mar 14 09:06:52 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!thughes From: thughes@netcom.com (Tomas Hughes) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar14.090652.2638@netcom.com> Date: Tue, 14 Mar 1995 09:06:52 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 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. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Did Marcus take the decryption EPROM with him when he left the lab? -- Tomas Hughes US Robotics Courier V.34 @ ISDN 64k bps "5 sigma is a discovery. 7 is a question." From tpopov@purdue.edu Tue Mar 14 18:53:52 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!purdue!tpopov From: tpopov@purdue.edu (Tomas Popov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar14.185352.1440@purdue.edu> Date: Tue, 14 Mar 1995 18:53:52 GMT References: <1995Mar14.090652.2638@netcom.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Mar14.090652.2638@netcom.com>, thughes@netcom.com (Tomas Hughes) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- === Tomas Popov === Dept of Electrical Engineering, Purdue University Engineering Computer Network "Measuring a record you own is listening, not piracy." From spark@mit.edu Thu Mar 16 19:51:52 1995 Path: ashpoly!cascade!mxgate!coyoacan!mit!spark From: spark@mit.edu (Steve Park) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar16.195152.1327@mit.edu> Date: Thu, 16 Mar 1995 19:51:52 GMT References: <1995Mar14.090652.2638@netcom.com> <1995Mar14.185352.1440@purdue.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Mar14.185352.1440@purdue.edu>, tpopov@purdue.edu (Tomas Popov) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Steve Park Opinions expressed are solely my own and not those of Massachusetts Institute of Technology. ------------------------------------------------------------