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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.mel.connect.com.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.eng.convex.com!newsrelay.netins.net!solaris.cc.vt.edu!newsfeed.internetmci.com!in2.uu.net!news1.digital.com!vixie!nnrp.vix.com!vixie From: vixie@vix.com (Paul A Vixie) Newsgroups: comp.unix.bsd.bsdi.misc Subject: Re: multiple pci cards [shared IRQs] Date: 11 Mar 1996 01:15:25 GMT Organization: Vixie Enterprises Lines: 14 Message-ID: <VIXIE.96Mar10171525@wisdom.vix.com> References: <313E5821.6D78@execpc.com> <4htrn1$otm@raid.us.dell.com> <4hve6j$1c0@park.uvsc.edu> NNTP-Posting-Host: wisdom.home.vix.com In-reply-to: Terry Lambert's message of 10 Mar 1996 20:31:15 GMT If interrupts are happening so fast that the demux is expensive, then your system has other problems besides shared interrupts. An interrupt per packet or disk block moved in or out is no big deal, even if you have to probe several drivers. As for ISA, it's true that ISA interrupts are not shareable, but E-ISA, and EISA, interrupts can be. I believe that all PnP ISA cards are E-ISA, and with PnP taking over the universe I think we're about to see the last of edge trigger interrupts. -- Paul Vixie La Honda, CA "Illegitimibus non carborundum." <paul@vix.com> pacbell!vixie!paul