From gsantos@netcom.com Sat Sep 24 12:53:47 1994 Path: ashpoly!cascade!brgate!saturno!netcom!gsantos From: gsantos@netcom.com (Göran Santos) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep24.125347.5344@netcom.com> Date: Sat, 24 Sep 1994 12:53:47 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 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. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- === Göran Santos === Dept of Electrical Engineering, NETCOM On-Line Communication Services "Do not worship the copy." From nkuznetsov@pacbell.net Sun Sep 25 14:27:47 1994 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!nkuznetsov From: nkuznetsov@pacbell.net (Nadia Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep25.142747.5120@pacbell.net> Date: Sun, 25 Sep 1994 14:27:47 GMT References: <1994Sep24.125347.5344@netcom.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Sep24.125347.5344@netcom.com>, gsantos@netcom.com (Göran Santos) 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 Kuznetsov Hayes Optima 288 @ 9600 Telebit bps "We don't sign stars. We build them." From skim@clari.net Tue Sep 27 11:41:47 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!skim From: skim@clari.net (Sun-mi Kim) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep27.114147.3209@clari.net> Date: Tue, 27 Sep 1994 11:41:47 GMT References: <1994Sep24.125347.5344@netcom.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Sep24.125347.5344@netcom.com>, gsantos@netcom.com (Göran Santos) 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. -- Sun-mi Kim "Row 14. No joke." Commodore Amiga 500 (1MB OCS) / FreeBSD 2.1 From epopov@pacbell.net Thu Sep 29 14:30:47 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!epopov From: epopov@pacbell.net (Élodie Popov) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep29.143047.3257@pacbell.net> Date: Thu, 29 Sep 1994 14:30:47 GMT References: <1994Sep24.125347.5344@netcom.com> <1994Sep25.142747.5120@pacbell.net> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Sep25.142747.5120@pacbell.net>, nkuznetsov@pacbell.net (Nadia Kuznetsov) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Élodie Popov | epopov@pacbell.net PGP Key fingerprint: 1D8B 9F40 C704 5EE2 "Keep the channels open."