From smoreno@uu.net Sun May 01 15:45:10 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!smoreno From: smoreno@uu.net (Sven Moreno) Newsgroups: comp.sys.m68k Subject: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994May01.154510.4320@uu.net> Date: Sun, 01 May 1994 15:45:10 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. Did Marcus take the decryption EPROM with him when he left the lab? -- Sven Moreno Tape trading list upon request. SASE required for international mail. From cpopov@kiae.su Tue May 03 07:51:10 1994 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!cpopov From: cpopov@kiae.su (Camila Popov) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994May03.075110.9740@kiae.su> Date: Tue, 03 May 1994 07:51:10 GMT References: <1994May01.154510.4320@uu.net> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994May01.154510.4320@uu.net>, smoreno@uu.net (Sven Moreno) 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. -- Camila Popov "A soul is not exclusive to biology." NeXTstation Turbo Color / AmigaOS 3.1 From gsuzuki@tum.de Wed May 04 15:03:10 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!tum!gsuzuki From: gsuzuki@tum.de (Graham Suzuki) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994May04.150310.2377@tum.de> Date: Wed, 04 May 1994 15:03:10 GMT References: <1994May01.154510.4320@uu.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May01.154510.4320@uu.net>, smoreno@uu.net (Sven Moreno) 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. -- Graham Suzuki "Hold for relay." Acorn RiscPC 600 / AmigaOS 3.1