From egonzalez@kth.se Mon Oct 02 09:46:32 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!egonzalez From: egonzalez@kth.se (Emi González) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Oct02.094632.4093@kth.se> Date: Mon, 02 Oct 1995 09:46:32 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. 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? -- Emi González *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From tfischer@hanse.de Wed Oct 04 03:20:32 1995 Path: ashpoly!cascade!bigsur!hanse!tfischer From: tfischer@hanse.de (Tyler Fischer) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Oct04.032032.2676@hanse.de> Date: Wed, 04 Oct 1995 03:20:32 GMT References: <1995Oct02.094632.4093@kth.se> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Oct02.094632.4093@kth.se>, egonzalez@kth.se (Emi González) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. > 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. -- Tyler Fischer *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From nreyes@panix.com Fri Oct 06 05:36:32 1995 Path: ashpoly!cascade!transat!ukc!fennimore!panix!nreyes From: nreyes@panix.com (Nadia Reyes) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Oct06.053632.5092@panix.com> Date: Fri, 06 Oct 1995 05:36:32 GMT References: <1995Oct02.094632.4093@kth.se> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Oct02.094632.4093@kth.se>, egonzalez@kth.se (Emi González) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Nadia Reyes -- Public Access Unix of New York "When every node is whole, the channel opens."