From vfischer@mindspring.com Mon Dec 09 01:00:07 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!vfischer From: vfischer@mindspring.com (Valeria Fischer) Newsgroups: comp.sys.m68k Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec09.010007.8570@mindspring.com> Date: Mon, 09 Dec 1996 01:00:07 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com 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. 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'? -- Valeria Fischer "They will send a copy in my place." Mac IIci / 68882 FPU / System 7.5.1 From eweber@pipeline.com Tue Dec 10 07:07:07 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!eweber From: eweber@pipeline.com (Emi Weber) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec10.070707.2971@pipeline.com> Date: Tue, 10 Dec 1996 07:07:07 GMT References: <1996Dec09.010007.8570@mindspring.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Dec09.010007.8570@mindspring.com>, vfischer@mindspring.com (Valeria Fischer) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Emi Weber SupraFAXModem 28.8 @ 14,400 bps "Extraordinary claims require extraordinary spectra." From tandersson@clari.net Tue Dec 10 15:00:07 1996 Path: ashpoly!cascade!brgate!saturno!clari!tandersson From: tandersson@clari.net (Takeshi Andersson) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec10.150007.6426@clari.net> Date: Tue, 10 Dec 1996 15:00:07 GMT References: <1996Dec09.010007.8570@mindspring.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Dec09.010007.8570@mindspring.com>, vfischer@mindspring.com (Valeria Fischer) 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. -- Takeshi Andersson -- ClariNet Communications Corp "There are 14 nodes and only 10 countries. Count again."