From owner-freebsd-questions Wed Sep 25 13:10:45 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id NAA03970 for questions-outgoing; Wed, 25 Sep 1996 13:10:45 -0700 (PDT) Received: from tera.com (tera.com [206.215.142.10]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id NAA03930 for ; Wed, 25 Sep 1996 13:10:39 -0700 (PDT) Received: (from kline@localhost) by tera.com (8.7.5/8.7.3) id NAA25242; Wed, 25 Sep 1996 13:08:02 -0700 (PDT) From: Gary Kline Message-Id: <199609252008.NAA25242@tera.com> Subject: Re: support for 16650 In-Reply-To: from "Eric J. Schwertfeger" at "Sep 25, 96 09:10:16 am" To: ejs@bfd.com (Eric J. Schwertfeger) Date: Wed, 25 Sep 1996 13:07:58 -0700 (PDT) Cc: nadav@barcode.co.il, dwhite@resnet.uoregon.edu, lmcsato@lmc.ericsson.se, freebsd-questions@FreeBSD.org X-Mailer: ELM [version 2.4ME+ PL23 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-questions@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk According to Eric J. Schwertfeger: > > > > I guess not. Found this in sio.c: > > static struct speedtab comspeedtab[] = { > > > 57600, COMBRD(57600), > > 115200, COMBRD(115200), > > -1, -1 > > >From what I understand, what the 16650 does is just allow a clock rate of > 4 times that which a 16550 will handle, so if you tell it to use 57600, > you'll really get 230Kbaud. Note this would be set using jumpers on > the IO card, not any software setting. The only way the programming > interface is different is the deeper FIFO. Should be a trivial > modification to anyone that understands the sio driver and has the chip > references. > > Maybe this change can be dropped into a -current version, yes? I have heard rumblings--at least 3rd- or 4th-hand-- that within a year the POTS modems will be screaming along at 57Kbps or something. Anybody else hear these rumors? gary kline