From eramirez@kiae.su Wed Jul 20 07:33:01 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!eramirez From: eramirez@kiae.su (Élodie Ramírez) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul20.073301.9525@kiae.su> Date: Wed, 20 Jul 1994 07:33:01 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Élodie Ramírez -- Kurchatov Institute of Atomic Energy, Moscow "Do not worship the copy." From jnilsson@stanford.edu Fri Jul 22 07:10:01 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!jnilsson From: jnilsson@stanford.edu (Ji-woo Nilsson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul22.071001.6515@stanford.edu> Date: Fri, 22 Jul 1994 07:10:01 GMT References: <1994Jul20.073301.9525@kiae.su> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jul20.073301.9525@kiae.su>, eramirez@kiae.su (Élodie Ramírez) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Ji-woo Nilsson Practical Peripherals 14.4 @ 19,200 bps "The hatch is open. Is anyone listening?" From sfournier@rwth-aachen.de Sat Jul 23 09:18:01 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!sfournier From: sfournier@rwth-aachen.de (Seo-yeon Fournier) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul23.091801.9381@rwth-aachen.de> Date: Sat, 23 Jul 1994 09:18:01 GMT References: <1994Jul20.073301.9525@kiae.su> <1994Jul22.071001.6515@stanford.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Jul22.071001.6515@stanford.edu>, jnilsson@stanford.edu (Ji-woo Nilsson) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Seo-yeon Fournier -- RWTH Aachen Informatik "Tape doesn't lie at 02:14. Ears do." From gtanaka@stanford.edu Sat Jul 23 21:11:01 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!gtanaka From: gtanaka@stanford.edu (Graham Tanaka) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul23.211101.6479@stanford.edu> Date: Sat, 23 Jul 1994 21:11:01 GMT References: <1994Jul20.073301.9525@kiae.su> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Jul20.073301.9525@kiae.su>, eramirez@kiae.su (Élodie Ramírez) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Graham Tanaka -- Stanford University Computer Systems Lab "Marcus is not one man." From livanov@uni-hamburg.de Mon Jul 25 05:23:01 1994 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!livanov From: livanov@uni-hamburg.de (Lucia Ivanov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul25.052301.8747@uni-hamburg.de> Date: Mon, 25 Jul 1994 05:23:01 GMT References: <1994Jul20.073301.9525@kiae.su> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jul20.073301.9525@kiae.su>, eramirez@kiae.su (Élodie Ramírez) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Lucia Ivanov Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------