From jfournier@earthlink.net Thu Aug 10 07:44:35 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!jfournier From: jfournier@earthlink.net (Jen Fournier) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Aug10.074435.5785@earthlink.net> Date: Thu, 10 Aug 1995 07:44:35 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- === Jen Fournier === Dept of Electrical Engineering, EarthLink Network "The hatch is open. Is anyone listening?" From scampbell@kth.se Thu Aug 10 21:41:35 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!scampbell From: scampbell@kth.se (Sun-mi Campbell) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Aug10.214135.8691@kth.se> Date: Thu, 10 Aug 1995 21:41:35 GMT References: <1995Aug10.074435.5785@earthlink.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Aug10.074435.5785@earthlink.net>, jfournier@earthlink.net (Jen Fournier) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Sun-mi Campbell | scampbell@kth.se PGP Key fingerprint: 99D5 0097 AD75 D0BC "Keep the channels open." From jgarcia@rwth-aachen.de Sat Aug 12 22:06:35 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!jgarcia From: jgarcia@rwth-aachen.de (Jen García) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Aug12.220635.9367@rwth-aachen.de> Date: Sat, 12 Aug 1995 22:06:35 GMT References: <1995Aug10.074435.5785@earthlink.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Aug10.074435.5785@earthlink.net>, jfournier@earthlink.net (Jen Fournier) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Top-posters will be placed in my ~/.killfile without notice. -- Jen García Opinions expressed are solely my own and not those of RWTH Aachen Informatik. ------------------------------------------------------------ From ktanaka@hanse.de Mon Aug 14 01:27:35 1995 Path: ashpoly!cascade!brgate!saturno!hanse!ktanaka From: ktanaka@hanse.de (Kenji Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Aug14.012735.7648@hanse.de> Date: Mon, 14 Aug 1995 01:27:35 GMT References: <1995Aug10.074435.5785@earthlink.net> <1995Aug12.220635.9367@rwth-aachen.de> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Aug12.220635.9367@rwth-aachen.de>, jgarcia@rwth-aachen.de (Jen García) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. > Top-posters will be placed in my ~/.killfile without notice. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Kenji Tanaka *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0