Date: Wed, 14 Aug 1996 08:26:21 -0700 (PDT) From: zounds@INNOSOFT.COM To: Craig Harding <C.R.Harding@massey.ac.nz> Cc: freebsd-hackers@FreeBSD.org Subject: Re: sio issues (silo overflows on a pentium, locked in ttywait, etc...) Message-ID: <Pine.PMDF.3.91.960814082526.541068897A-100000@INNOSOFT.COM> In-Reply-To: <199608140213.TAA27489@freefall.freebsd.org>
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On Wed, 14 Aug 1996, Craig Harding wrote: > Thomas David Rivers <ponds!rivers@dg-rtp.dg.com> writes: > > >Seems to me a Pentium 75 should be able to keep up with 19200, and > >hopefully be able to do much better... am I the only one tripping > >over these sio issues? Is there some other magic to setting rts/cts > >that I don't know about? Is there any hope my 386dx with 16550As will > >be able to handle anything higher than 19200 without locking up? > > As a data point: I'm running 2.0.5-RELEASE on a 486SX25 with two serial > ports containing real 16550As. Both ports are locked at 57600 and users > happily dialin and use one line interactively (on a 14k4 modem) while the > other line on the 28k8 modem gets 3400cps receiving approx. 80MB of > compressed news per day via Taylor UUCP. No silo overflows. > > I think the previous message relating to custom single-chip emulation of a > 16550A may explain your problems. > I am wondering if the 19200 speed is because of the lack of hardware handshaking cables.
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