From owner-freebsd-hackers Sun Jan 11 17:47:17 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.7/8.8.7) id RAA03925 for hackers-outgoing; Sun, 11 Jan 1998 17:47:17 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from dyson.iquest.net (dyson.iquest.net [198.70.144.127]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id RAA03918 for ; Sun, 11 Jan 1998 17:47:00 -0800 (PST) (envelope-from toor@dyson.iquest.net) Received: (from root@localhost) by dyson.iquest.net (8.8.8/8.8.8) id UAA00911; Sun, 11 Jan 1998 20:46:49 -0500 (EST) (envelope-from toor) Message-Id: <199801120146.UAA00911@dyson.iquest.net> Subject: Re: 16650 Support(?) In-Reply-To: <34c38080.8877417@mail.cetlink.net> from John Kelly at "Jan 12, 98 02:37:53 am" To: jak@cetlink.net (John Kelly) Date: Sun, 11 Jan 1998 20:46:49 -0500 (EST) Cc: hackers@FreeBSD.ORG From: "John S. Dyson" Reply-To: dyson@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL31 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk John Kelly said: > On Sun, 11 Jan 1998 20:12:12 -0500 (EST), "John S. Dyson" > wrote: > > >The 650 enabled code uses the entire 32 byte buffer > > Presumably you mean for transmit data only? > > The bit setting for a receive trigger level of 14 in a 550 gives a > receive trigger level of 28 in a 650. Either way, SIO should merely > drain receive data until the FIFO is empty, right? > It is being used correctly. Of course, you still might use the entire buffer, whatever the trigger level is set to. It depends on interrupt latencies, etc. -- John | Never try to teach a pig to sing, dyson@freebsd.org | it just makes you look stupid, jdyson@nc.com | and it irritates the pig.