From dsilva@illinois.edu Sun Apr 21 10:49:34 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!dsilva From: dsilva@illinois.edu (Dong-hyun Silva) Newsgroups: comp.sys.m68k Subject: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Apr21.104934.7504@illinois.edu> Date: Sun, 21 Apr 1996 10:49:34 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Dong-hyun Silva *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From mramirez@hanse.de Mon Apr 22 08:49:34 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!hanse!mramirez From: mramirez@hanse.de (Morag Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Apr22.084934.7942@hanse.de> Date: Mon, 22 Apr 1996 08:49:34 GMT References: <1996Apr21.104934.7504@illinois.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Apr21.104934.7504@illinois.edu>, dsilva@illinois.edu (Dong-hyun Silva) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Morag Ramírez "Tape doesn't lie at 02:14. Ears do." Atari Falcon 030 / TOS 4.04 From ksuzuki@ox.ac.uk Tue Apr 23 05:29:34 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!ksuzuki From: ksuzuki@ox.ac.uk (Karen Suzuki) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Apr23.052934.1931@ox.ac.uk> Date: Tue, 23 Apr 1996 05:29:34 GMT References: <1996Apr21.104934.7504@illinois.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Apr21.104934.7504@illinois.edu>, dsilva@illinois.edu (Dong-hyun Silva) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. PGP Public key available via finger or upon request. -- Karen Suzuki *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From lhernandez@earthlink.net Tue Apr 23 10:32:34 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!lhernandez From: lhernandez@earthlink.net (Lars Hernández) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Apr23.103234.6597@earthlink.net> Date: Tue, 23 Apr 1996 10:32:34 GMT References: <1996Apr21.104934.7504@illinois.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Apr21.104934.7504@illinois.edu>, dsilva@illinois.edu (Dong-hyun Silva) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Lars Hernández Practical Peripherals 14.4 @ 33,600 bps "Hardware is temporary. The signal survives."