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Newsgroups: comp.os.386bsd.questions Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!geraldo.cc.utexas.edu!portal.austin.ibm.com!awdprime.austin.ibm.com!boyd From: boyd@austin.ibm.com (Boyd R. Faulkner) Subject: Re: Hardware Flow Control in SIO Originator: boyd@worf.cet.austin.ibm.com Message-ID: <CEJH0s.2zFK@austin.ibm.com> Sender: boyd@austin.ibm.com () Date: Thu, 7 Oct 1993 18:07:40 GMT Reply-To: boyd@austin.ibm.com References: <JKH.93Oct4083135@whisker.lotus.ie> <CEDnEn.D9r@usenet.ucs.indiana.edu> <BLYMN.93Oct5170310@mallee.awadi.com.au> <CEHLMA.Brw@dragon.dsh.org> Organization: IBM Austin Lines: 50 In article <CEHLMA.Brw@dragon.dsh.org>, gary@dragon.dsh.org (Gary D. Duzan) writes: > In article <BLYMN.93Oct5170310@mallee.awadi.com.au> blymn@mallee.awadi.com.au (Brett Lymn) writes: > =>>>>>> On Mon, 4 Oct 1993 14:39:58 GMT, pitts@bigbang.astro.indiana.edu (Jim Pitts) said: > =>Jim> Nntp-Posting-Host: bigbang.astro.indiana.edu > => > =>Jim> Boy, you are not far off on that one. Is there a good reason you are not > =>Jim> using the sio driver? I get 1.4-1.9K/sec from my 14.4 (USR Sportster) using > =>Jim> ftp/16550A/sio drivers. > => > =>Could be because it works, apparently there are some problems with > =>sio, most notably with handling of hardware flow control. > => > I've noticed this as well, or at least I assume my symptoms are the > same. I set up a getty line with a Hayes 9600 Ultra on a 386BSD system > with a FreeBSD kernel (yeah, yeah, I know; I'll upgrade the rest later) > and the SIO+BIDIR drivers. Dialing in at 9600 was fine, but I have a > SupraModem 2400 at home. When connecting at 2400, it would work for a > bit, but when the system tried to send a burst of data quickly, it > would start out fine and come out garbled after a few lines. I replaced > the Hayes with a US Robotics Courier 2400, and the problem went away, > but I would like to be able to dial out at 9600 on the dialin line > using the BIDIR feature. Is there a workaround for this, or will it > require a fix? > > Gary D. Duzan > Network Administrator > Delaware State Hospital > > > > Yes. This also was a problem in 0.2.4 and is not fixed in Freebsd. Fortunately, the workaround is simple. As soon as you have logged in, do... stty 2400 Then it will not garble. I have two boxes, Freebsd with a 14,400 and a DOS/OS/2 box with a 2400 baud modem. It was not just my 2400 baud modem as a friend had the same problem dialing into my machine. For DOS type communications programs, I recommend setting TERM=vt200 or vt100. The pc3 emulation didn't work very well. Boyd Faulkner I do not speak for IBM and vice-versa.