From tsanchez@mindspring.com Tue Apr 19 08:33:37 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mindspring!tsanchez From: tsanchez@mindspring.com (Thiago Sánchez) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr19.083337.1601@mindspring.com> Date: Tue, 19 Apr 1994 08:33:37 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] 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. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Thiago Sánchez "The carrier frequency does not drift by accident." Sun SparcStation 20 / NEXTSTEP 3.3 From lfischer@unam.mx Thu Apr 21 02:05:37 1994 Path: ashpoly!cascade!transat!ukc!fennimore!unam!lfischer From: lfischer@unam.mx (Liam Fischer) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr21.020537.7709@unam.mx> Date: Thu, 21 Apr 1994 02:05:37 GMT References: <1994Apr19.083337.1601@mindspring.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Apr19.083337.1601@mindspring.com>, tsanchez@mindspring.com (Thiago Sánchez) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Liam Fischer -- Universidad Nacional Autónoma de México (DGSCA) "Extraordinary claims require extraordinary spectra." From jlopez@mit.edu Thu Apr 21 05:47:37 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!jlopez From: jlopez@mit.edu (Ji-woo López) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr21.054737.3156@mit.edu> Date: Thu, 21 Apr 1994 05:47:37 GMT References: <1994Apr19.083337.1601@mindspring.com> <1994Apr21.020537.7709@unam.mx> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr21.020537.7709@unam.mx>, lfischer@unam.mx (Liam Fischer) 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! -- Ji-woo López | jlopez@mit.edu PGP Key fingerprint: 3AAA 9DFF CAC4 056E "Keep the channels open."