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Xref: sserve comp.sys.ibm.pc.hardware.chips:17147 comp.sys.ibm.pc.hardware.comm:6679 comp.os.386bsd.misc:5145 Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!bunyip.cc.uq.oz.au!munnari.oz.au!constellation!news.uoknor.edu!ns1.nodak.edu!netnews.nwnet.net!oracle.pnl.gov!osi-east2.es.net!lll-winken.llnl.gov!uwm.edu!vixen.cso.uiuc.edu!howland.reston.ans.net!news.sprintlink.net!hookup!olivea!wetware!kaiwan.kaiwan.com!usenet From: mzapka@kaiwan.com (Michael B. Zapka) Newsgroups: comp.sys.ibm.pc.hardware.chips,comp.sys.ibm.pc.hardware.comm,comp.os.386bsd.misc Subject: Re: Re-clocking a 16550 for 230,400? Date: 27 Jan 1995 08:01:48 GMT Organization: KAIWAN Internet (310-527-4279,818-756-0180,909-785-9712,714-638-4133,805-294-9338) Lines: 19 Message-ID: <3ga99c$ms3@kaiwan.kaiwan.com> References: <3g8agg$19h@brasil.moneng.mei.com> NNTP-Posting-Host: kaiwan009.kaiwan.com Mime-Version: 1.0 X-Newsreader: WinVN 0.93.11 In article <3g8agg$19h@brasil.moneng.mei.com>, jgreco@brasil.moneng.mei.com says... > >I've looked over all the data sheets. I've looked through a bunch of Usenet >FAQ's. I've looked at the sources for my OS's serial device drivers. > >Problem: I need a 230,400 bps serial port. > >Somebody's suggested solution: Buy a Hayes high speed serial card, and > select the "4x clock" option. You're right it will work (provided the support chips can take it, but 230k shouldn't be a problem). But the problem will be all of your existing software will not work correctly due to the serial divisors will be off by a factor of two. If you're doing your own program or have a program which you can enter the divisors.. no prob... (Or just know that your term entry of 115.2k is really 230.4k.)