Message-ID: <39916632.62BB39EA@imec.be> Date: Wed, 09 Aug 2000 16:09:54 +0200 From: Steven Sanders Organization: imec vzw X-Mailer: Mozilla 4.08 [en] (WinNT; I) MIME-Version: 1.0 Newsgroups: comp.arch.fpga Subject: 3-state busses on Virtex? Content-Type: multipart/mixed; boundary="------------5A5E82123D44B10B5D78036E" Lines: 38 NNTP-Posting-Host: 194.7.108.57 X-Trace: bru5-newsr1.be.uu.net 965829674 11455 194.7.108.57 Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news.ifi.unizh.ch!news.imp.ch!psinet-eu-nl!newsfeeds.belnet.be!news.belnet.be!skynet.be!newsfeed1.news.nl.uu.net!sun4nl!bru5-newsr1.be.uu.net!not-for-mail Xref: chonsp.franklin.ch comp.arch.fpga:1005 This is a multi-part message in MIME format. --------------5A5E82123D44B10B5D78036E Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hello, I was wondering how 3-state busses are REALLY implemented in Virtex devices. Is a real 3-state bus possible or is everything divided in separate lines from block to block which accesses the bus? Thanx in advance! Steven. --------------5A5E82123D44B10B5D78036E Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Steven Sanders Content-Disposition: attachment; filename="vcard.vcf" begin: vcard fn: Steven Sanders n: Sanders;Steven org: imec vzw adr: Flanders Language Valley 44;;;Ieper;W.-Vl.;8900;Belgium email;internet: sanders@imec.be tel;work: 057 230 140 tel;fax: 057 230 164 tel;home: 059 298 862 note: cellular: +32 476 582 612 x-mozilla-cpt: ;0 x-mozilla-html: FALSE version: 2.1 end: vcard --------------5A5E82123D44B10B5D78036E-- ###### From: Philip Freidin Newsgroups: comp.arch.fpga Subject: Re: 3-state busses on Virtex? Organization: Fliptronics Reply-To: philip@fliptronics.com Message-ID: References: <39916632.62BB39EA@imec.be> X-Newsreader: Forte Agent 1.8/32.548 trialware MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 32 Date: Wed, 09 Aug 2000 23:05:41 -0700 NNTP-Posting-Host: 216.103.85.188 X-Complaints-To: abuse@pacbell.net X-Trace: news.pacbell.net 965887569 216.103.85.188 (Wed, 09 Aug 2000 23:06:09 PDT) NNTP-Posting-Date: Wed, 09 Aug 2000 23:06:09 PDT Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!newsfeed-zh.ip-plus.net!news.ip-plus.net!news.tesion.net!news.belwue.de!news.uni-ulm.de!rz.uni-karlsruhe.de!blackbush.xlink.net!news0.de.colt.net!colt.net!newspeer.clara.net!news.clara.net!feed2.onemain.com!feed1.onemain.com!cyclone-sf.pbi.net!206.13.28.144!news.pacbell.net.POSTED!not-for-mail Xref: chonsp.franklin.ch comp.arch.fpga:1003 On Wed, 09 Aug 2000 16:09:54 +0200, Steven Sanders wrote: >Hello, > >I was wondering how 3-state busses are REALLY implemented in Virtex >devices. Is a real 3-state bus possible or is everything divided in >separate lines from block to block which accesses the bus? >Thanx in advance! >Steven. The best way to answer questions like this is to get the IBM patent server to help you. Try this: http://204.146.135.160/cgi-bin/viewpat.cmd/US05677638__ and http://204.146.135.160/cgi-bin/viewpat.cmd/US05847580__ and http://204.146.135.160/cgi-bin/viewpat.cmd/US05939930__ Philip Freidin Mindspring that acquired Earthlink that acquired Netcom has decided to kill off all Shell accounts, including mine. My new primary email address is philip@fliptronics.com I'm sure the inconvenience to you will be less than it is for me. ###### From: Hernan Saab Newsgroups: comp.arch.fpga Subject: Re: 3-state busses on Virtex? Date: Thu, 10 Aug 2000 12:45:39 -0700 Organization: The ISP formerly known as Best Lines: 62 Message-ID: <39930663.F7A96B7F@synplicity.com> References: <39916632.62BB39EA@imec.be> NNTP-Posting-Host: synvpn.synplicity.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: nntp1.ba.best.com 965935882 84536 209.157.48.1 (10 Aug 2000 19:31:22 GMT) X-Complaints-To: abuse@best.com NNTP-Posting-Date: 10 Aug 2000 19:31:22 GMT To: philip@fliptronics.com X-Mailer: Mozilla 4.7 [en] (WinNT; I) X-Accept-Language: en Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news.ifi.unizh.ch!news.imp.ch!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newshub2.home.com!newshub2.rdc1.sfba.home.com!news.home.com!news2.best.com!nntp1.ba.best.com!not-for-mail Xref: chonsp.franklin.ch comp.arch.fpga:565 I can read this implementation is pretty much implemented as a priority encoder (this fact confirms my guess that I sent to Peter Alfke a few months back). I find it hard to believe a company would even dare to Patent this feature. Is there a very complicated detail I maybe missing about this patent? Philip Freidin wrote: > On Wed, 09 Aug 2000 16:09:54 +0200, Steven Sanders wrote: > > >Hello, > > > >I was wondering how 3-state busses are REALLY implemented in Virtex > >devices. Is a real 3-state bus possible or is everything divided in > >separate lines from block to block which accesses the bus? > >Thanx in advance! > >Steven. > > The best way to answer questions like this is to get the IBM patent > server to help you. Try this: > > http://204.146.135.160/cgi-bin/viewpat.cmd/US05677638__ > > and > > http://204.146.135.160/cgi-bin/viewpat.cmd/US05847580__ > > and > > http://204.146.135.160/cgi-bin/viewpat.cmd/US05939930__ > > Philip Freidin > > Mindspring that acquired Earthlink that acquired Netcom has > decided to kill off all Shell accounts, including mine. > > My new primary email address is philip@fliptronics.com > > I'm sure the inconvenience to you will be less than it is for me. -- Hernan Javier Saab Western Area Applications Engineer Email: HERNAN@synplicity.com Direct Phone: 408-215-6139 Main Phone: 408-215-6000 Pager: 888-712-5803 FAX: 408-990-0295 Synplicity, Inc. 935 Stewart Drive Sunnyvale, CA 94086 USA Internet ###### Message-ID: <399371AB.E20249B7@earthlink.net> From: Peter Alfke Reply-To: palfke@earthlink.net X-Mailer: Mozilla 4.61 (Macintosh; I; PPC) X-Accept-Language: en,pdf MIME-Version: 1.0 Newsgroups: comp.arch.fpga Subject: Re: 3-state busses on Virtex? References: <39916632.62BB39EA@imec.be> <39930663.F7A96B7F@synplicity.com> Content-Type: text/plain; charset=us-ascii; x-mac-type="54455854"; x-mac-creator="4D4F5353" Content-Transfer-Encoding: 7bit Lines: 16 Date: Fri, 11 Aug 2000 03:23:24 GMT NNTP-Posting-Host: 158.252.221.7 X-Complaints-To: abuse@earthlink.net X-Trace: newsread1.prod.itd.earthlink.net 965964204 158.252.221.7 (Thu, 10 Aug 2000 20:23:24 PDT) NNTP-Posting-Date: Thu, 10 Aug 2000 20:23:24 PDT Organization: EarthLink Inc. -- http://www.EarthLink.net Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news.ifi.unizh.ch!news.imp.ch!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed1.earthlink.net!newsmaster1.prod.itd.earthlink.net!newsread1.prod.itd.earthlink.net.POSTED!not-for-mail Xref: chonsp.franklin.ch comp.arch.fpga:464 Hernan Saab wrote: > I find it hard to believe a company would even dare to Patent this feature. C'mon Hernan, patents have nothing to do with "daring". If you have a smart idea, and you think it is novel, and you get it past the patent examiner, you get a patent. Doesn't mean that it always is the greatest invention ever. But it might be... The objective here was to avoid the inherent delay of a conventional 3-state bus driver, but achieve the same functionality. Peter Alfke