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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!spool.mu.edu!uwm.edu!math.ohio-state.edu!howland.erols.net!feed1.news.erols.com!news From: Ken Bigelow <kbigelow@www.play-hookey.com> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Sio1 not seen Date: Sat, 16 Nov 1996 20:54:55 +0000 Organization: Erol's Internet Services Lines: 28 Message-ID: <328E2A1F.1F7A@www.play-hookey.com> References: <slrn58i4c9.6i.feisal@lancelot.valsayn.tt> Reply-To: kbigelow@www.play-hookey.com NNTP-Posting-Host: kenjb05.play-hookey.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0 (Win16; U) Feisal Mohammed wrote: > > Hi, > > I have an interesting problem, I have upgraded my CPU from 486/50 > to a Pentium Overdrive/83 and sometimes on bootup sio1 is not seen. > It happens randomly and the only way to stop it is to boot up with > -c, go to visual, exit and continue the boot. Is there some timing factor > I need to > tweak in the sio driver? I am running 2.1.0 RELEASE, I will upgrade > to 2.1.5 but my CD drive just died. Sio1 is on a USR sportster 28.8 > (16550A) and sio0 is the standard port on the motherboard (16450). > The machine is a Compaq Presario 850 with 16MB. > Hmmm. I assume that modem/port is on the ISA bus? If so, check your CMOS setup parameters to make sure that the ISA bus is not running any faster than 8.000 MHz. (33.3 MHz/4 is too fast; 40/5 just makes it, etc.) It isn't always true, and most devices will run slightly faster than 8 MHz without trouble. But every so often I run across some card or other (usually an NE2000 clone or some such) that just can't handle full communications when the clock exceeds the 8 MHz spec for this bus. -- Ken Are you interested in | byte-sized education | http://www.play-hookey.com over the Internet? |