From lvasiliev@purdue.edu Sat Mar 04 16:51:38 1995 Path: ashpoly!cascade!brgate!saturno!purdue!lvasiliev From: lvasiliev@purdue.edu (Lisa Vasiliev) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar04.165138.4973@purdue.edu> Date: Sat, 04 Mar 1995 16:51:38 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N 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? -- Lisa Vasiliev SupraFAXModem 28.8 @ 28,800 bps "Marcus is not one man." From skang@berkeley.edu Mon Mar 06 02:19:38 1995 Path: ashpoly!cascade!brgate!saturno!berkeley!skang From: skang@berkeley.edu (Sun-mi Kang) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar06.021938.6001@berkeley.edu> Date: Mon, 06 Mar 1995 02:19:38 GMT References: <1995Mar04.165138.4973@purdue.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Mar04.165138.4973@purdue.edu>, lvasiliev@purdue.edu (Lisa Vasiliev) 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. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- === Sun-mi Kang === Dept of Electrical Engineering, UC Berkeley Department of EECS "Hardware is temporary. The signal survives." From itanaka@pacbell.net Tue Mar 07 22:21:38 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!itanaka From: itanaka@pacbell.net (Ines Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar07.222138.8244@pacbell.net> Date: Tue, 07 Mar 1995 22:21:38 GMT References: <1995Mar04.165138.4973@purdue.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Mar04.165138.4973@purdue.edu>, lvasiliev@purdue.edu (Lisa Vasiliev) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Ines Tanaka Tape trading list upon request. SASE required for international mail. From dbrennan@cam.ac.uk Thu Mar 09 02:58:38 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!dbrennan From: dbrennan@cam.ac.uk (Diego Brennan) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar09.025838.4305@cam.ac.uk> Date: Thu, 09 Mar 1995 02:58:38 GMT References: <1995Mar04.165138.4973@purdue.edu> <1995Mar07.222138.8244@pacbell.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Mar07.222138.8244@pacbell.net>, itanaka@pacbell.net (Ines Tanaka) writes: > That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Diego Brennan Tape trading list upon request. SASE required for international mail.