From eperez@cmu.edu Thu May 25 20:45:27 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cmu!eperez From: eperez@cmu.edu (Elaine Pérez) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995May25.204527.6626@cmu.edu> Date: Thu, 25 May 1995 20:45:27 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 10 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. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Elaine Pérez Tape trading list upon request. SASE required for international mail. From dtanaka@uu.net Thu May 25 22:42:27 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!uu!dtanaka From: dtanaka@uu.net (Dave Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995May25.224227.8164@uu.net> Date: Thu, 25 May 1995 22:42:27 GMT References: <1995May25.204527.6626@cmu.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995May25.204527.6626@cmu.edu>, eperez@cmu.edu (Elaine Pérez) 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. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Dave Tanaka Hayes Optima 288 @ 28,800 bps "Marcus is not one man." From plee@stanford.edu Sun May 28 00:00:27 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!plee From: plee@stanford.edu (Pavel Lee) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995May28.000027.5258@stanford.edu> Date: Sun, 28 May 1995 00:00:27 GMT References: <1995May25.204527.6626@cmu.edu> <1995May25.224227.8164@uu.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995May25.224227.8164@uu.net>, dtanaka@uu.net (Dave Tanaka) writes: > That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- === Pavel Lee === Dept of Electrical Engineering, Stanford University Computer Systems Lab "When every node is whole, the channel opens."