From owner-freebsd-questions Sun May 17 11:31:22 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id LAA24163 for freebsd-questions-outgoing; Sun, 17 May 1998 11:31:22 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from techpower.net (hometeam@techpower.net [205.133.231.1]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA24146 for ; Sun, 17 May 1998 11:31:12 -0700 (PDT) (envelope-from hometeam@techpower.net) Received: from localhost (hometeam@localhost) by techpower.net (8.8.8/8.8.8) with SMTP id KAA01158; Sun, 17 May 1998 10:31:06 -0400 (EDT) (envelope-from hometeam@techpower.net) Date: Sun, 17 May 1998 10:31:06 -0400 (EDT) From: Jt To: Julian Elischer cc: questions@FreeBSD.ORG Subject: Re: sio driver In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Yes I set the for 3.6864 MHz which is the 230000 and it works just the overflow errors. If I set for 1.8432 which is the standard for 115200 16550 it works fine though I get no performance increase. Frequency select is 1.8, 3.6, or 7.3 These 16650 I can set the clock on them. allthough without the driver that comes with them . I can get the 32 byte receive buffer and the upsteam at 16 byte . So I could change the value in the kernel ? Only differance in the 16550 & 16650 is the 32 byte transmit buffer. on this card the receive buffer is allways 32 byte . hometeam@techpower.net --We cannot all be masters, nor all masters Cannot be truly follow'd-- -----BEGIN PGP MESSAGE----- Version: 2.6.2 owEBqwBU/4kAlQMFADRCxNWhsddKSTR+6QEBelED/jzeC3btZfqSdIfrNoCgwUJJ iNQ33UQoMyJ2ygkfl72xP5J79yml/F4P73GnNaDVbaMOmOG2NNAi5ElE73wRh54U 17kH+n5XnYeqekV8T2TG2Q6ex3UotXPyZ1vvrCrSxapOz6a4hh0GQeA55rcwLy2W ROHwxfvaVsrX5iVOkRoerBFiC21lc3NhZ2UudHh0AAAAAA== =jCvF -----END PGP MESSAGE----- On Sun, 17 May 1998, Julian Elischer wrote: > > > On Sun, 17 May 1998, Jt wrote: > > > > > Yeah I was trying for the 230000 I am isdn that was the whole > > purpose of the 16650 to increase thoughput. > > jkh mention that freebsd could handle 230 no problem just the 115000 > > 16550 was the restriction. it runs in windows 95 fine on the 230000 > > settings. If I where able to get no speed change I would stay at > > 115000. Are you also isdn? > > > A you COULD fix it by recompiling the kernel with the HZ value set to 200 > intead of 100. or you could do what we did which is to get a uart with 32 > byte fifo's instead of 16. > > the trouble is that the serial devices are not REALLY > interrupt driven, but run by the clock (it's a long story). > > 16 bytes at 230K is < 10mSec (the Hz ia 100Hz) > > > julian > > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message