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Newsgroups: comp.os.386bsd.questions Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!agate!howland.reston.ans.net!pipex!uunet!scomm!jan From: jan@filetek.com (Jan Morales) Subject: [NetBSD 0.9] configuring 4 serial ports Message-ID: <CI1GEq.382@filetek.com> Sender: news@filetek.com Organization: FileTek, Inc., Rockville, Maryland, U.S.A. Date: Tue, 14 Dec 1993 18:52:01 GMT Lines: 25 I was having trouble losing characters under heavy load and was told that part of the problem was that my serial ports were driven by 16450 UARTs and that I should get a 16550 UART-based serial card and that should help. I took advantage of the opportunity to buy a 4-port card. 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'm not at the machine right now but let's assume that currently port 1 is on IRQ2 and port 2 is on IRQ3. I plan to disable the motherboard serial ports and configure ports 1 and 2 on the card as they were on the motherboard. Do I then configure ports 3 and 4 on the card to IRQs 2 and 3 respectively, or IRQs 4 and 5? Any help for the clueless is appreciated! :-) Vital stats: 486DX33, 16Mb RAM, no SCSI or network Jan -- Jan Morales Internet: jan@filetek.com FileTek, Inc. UUCP: uunet!fltk!jan Rockville, Maryland, U.S.A.