From orobertson@kiae.su Tue Oct 08 16:19:15 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!kiae!orobertson From: orobertson@kiae.su (Olga Robertson) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct08.161915.4729@kiae.su> Date: Tue, 08 Oct 1996 16:19:15 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. 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? -- Olga Robertson "Hold for relay." Atari Falcon 030 / AmigaOS 3.1 From aeriksson@u-tokyo.ac.jp Thu Oct 10 04:11:15 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!aeriksson From: aeriksson@u-tokyo.ac.jp (Astrid Eriksson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct10.041115.1347@u-tokyo.ac.jp> Date: Thu, 10 Oct 1996 04:11:15 GMT References: <1996Oct08.161915.4729@kiae.su> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1996Oct08.161915.4729@kiae.su>, orobertson@kiae.su (Olga Robertson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Astrid Eriksson | aeriksson@u-tokyo.ac.jp PGP Key fingerprint: 2D55 77E4 5540 FE3D "Keep the channels open." From mgirard@earthlink.net Thu Oct 10 17:52:15 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!mgirard From: mgirard@earthlink.net (Mike Girard) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct10.175215.9142@earthlink.net> Date: Thu, 10 Oct 1996 17:52:15 GMT References: <1996Oct08.161915.4729@kiae.su> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Oct08.161915.4729@kiae.su>, orobertson@kiae.su (Olga Robertson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Mike Girard "In theory there is no difference between theory and practice." 486DX2/66 (Linux 1.2.13) / NEXTSTEP 3.3 From mkuznetsov@illinois.edu Sat Oct 12 17:03:15 1996 Path: ashpoly!cascade!mxgate!coyoacan!illinois!mkuznetsov From: mkuznetsov@illinois.edu (Marisol Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct12.170315.5675@illinois.edu> Date: Sat, 12 Oct 1996 17:03:15 GMT References: <1996Oct08.161915.4729@kiae.su> <1996Oct10.041115.1347@u-tokyo.ac.jp> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 12 In article <1996Oct10.041115.1347@u-tokyo.ac.jp>, aeriksson@u-tokyo.ac.jp (Astrid Eriksson) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Marisol Kuznetsov "There are 14 nodes and only 10 countries. Count again." Pentium 90 (OS/2 Warp) / System 7.5.1 From gweber@tum.de Sat Oct 12 21:45:15 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!gweber From: gweber@tum.de (Graham Weber) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct12.214515.2274@tum.de> Date: Sat, 12 Oct 1996 21:45:15 GMT References: <1996Oct08.161915.4729@kiae.su> <1996Oct10.041115.1347@u-tokyo.ac.jp> <1996Oct12.170315.5675@illinois.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Oct12.170315.5675@illinois.edu>, mkuznetsov@illinois.edu (Marisol Kuznetsov) writes: > That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Graham Weber | gweber@tum.de PGP Key fingerprint: E8D1 EC4F 41D8 4AC1 "Keep the channels open."