From tivanov@hanse.de Mon Jul 22 09:30:48 1996 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!tivanov From: tivanov@hanse.de (Thiago Ivanov) Newsgroups: comp.sys.m68k Subject: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jul22.093048.4167@hanse.de> Date: Mon, 22 Jul 1996 09:30:48 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Did Marcus take the decryption EPROM with him when he left the lab? -- Thiago Ivanov *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From shernandez@earthlink.net Tue Jul 23 18:53:48 1996 Path: ashpoly!cascade!transat!ukc!fennimore!earthlink!shernandez From: shernandez@earthlink.net (Sun-mi Hernández) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jul23.185348.9448@earthlink.net> Date: Tue, 23 Jul 1996 18:53:48 GMT References: <1996Jul22.093048.4167@hanse.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jul22.093048.4167@hanse.de>, tivanov@hanse.de (Thiago Ivanov) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. > Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Sun-mi Hernández Zyxel U-1496E @ 19,200 bps "When every node is whole, the channel opens." From tlopez@clari.net Thu Jul 25 09:19:48 1996 Path: ashpoly!cascade!bigsur!clari!tlopez From: tlopez@clari.net (Tobias López) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jul25.091948.2304@clari.net> Date: Thu, 25 Jul 1996 09:19:48 GMT References: <1996Jul22.093048.4167@hanse.de> <1996Jul23.185348.9448@earthlink.net> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Jul23.185348.9448@earthlink.net>, shernandez@earthlink.net (Sun-mi Hernández) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Tobias López Tape trading list upon request. SASE required for international mail.