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Path: sserve!newshost.anu.edu.au!munnari.oz.au!constellation!paladin.american.edu!europa.eng.gtefsd.com!uunet!utcsri!newsflash.concordia.ca!sifon!homer.cs.mcgill.ca!storm From: storm@cs.mcgill.ca (Marc WANDSCHNEIDER) Newsgroups: comp.os.386bsd.questions Subject: Re: [NetBSD 0.9] configuring 4 serial ports Date: 14 Dec 1993 20:05:59 GMT Organization: SOCS, McGill University, Montreal, Canada Lines: 27 Message-ID: <2el6b7$m52@homer.cs.mcgill.ca> References: <CI1GEq.382@filetek.com> NNTP-Posting-Host: mnementh.cs.mcgill.ca In article <CI1GEq.382@filetek.com>, Jan Morales <jan@filetek.com> wrote: > >The doc for the card says that the 4 ports can be configured to any IRQ >from 2 to 5. Does this mean that I should put each port on its own IRQ? >I had read somewhere that normally ports 1 and 3 share an IRQ and ports >2 and 4 do as well. I don't think that NetBSD does IRQ sharing (probably for a pretty good reason), and thus reserves IRQ's 1, 3, 5, and 9 for com0-3 (resp)---These are off the top of my head though. ON my machine at home, I have two serial ports on the motherboard, and two on a daughtercard. The two on the card are comm0 and com1, at their default IRQs. com2 on the motherboard is disabled, since I Need IRQ 5 for the BusMouse, and the other is com3, at IRQ 9 I believe. Works great. Marc 'me. -- ----------------------------------------------------------------------------- Marc Wandschneider Seattle, WA Barney the Dinosaur sings! You faint... Barney sings! Barney sings! --More-- You Die... --More--