From owner-freebsd-hardware Wed May 21 09:36:48 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id JAA19555 for hardware-outgoing; Wed, 21 May 1997 09:36:48 -0700 (PDT) Received: from wlk.com (news.wlk.com [192.86.83.250]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id JAA19547 for ; Wed, 21 May 1997 09:36:42 -0700 (PDT) Received: from SMTPdaemon by wlk.com (smail3.2) with SMTPL id m0wUEMP-0009roC; Wed, 21 May 1997 11:35:33 -0500 (CDT) Received: from critter (localhost [127.0.0.1]) by critter.dk.tfs.com (8.8.5/8.8.5) with ESMTP id SAA02382; Wed, 21 May 1997 18:31:38 +0200 (CEST) To: Bruce Evans cc: jmg@hydrogen.nike.efn.org.dk.tfs.com, brett@lariat.org, HARDWARE@freebsd.org, rberndt@nething.com, WELCHDW@wofford.edu From: Poul-Henning Kamp Subject: Re: isa bus and boca multiport boards In-reply-to: Your message of "Wed, 21 May 1997 23:44:29 +1000." <199705211344.XAA26555@godzilla.zeta.org.au> Date: Wed, 21 May 1997 18:31:37 +0200 Message-ID: <2380.864232297@critter> Sender: owner-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk In message <199705211344.XAA26555@godzilla.zeta.org.au>, Bruce Evans writes: >>so should I commit my changes that allow the sio to set 16550's to a >>trigger level of 8? and possibly make it more generic than it already >>is and allow people to define the resulting fifo level of the uart? > >I think it should default to "medium" (FIXO_RX_MEDH) if NSIO > 4 >and there should be ioctls to change both the receiver trigger >level and transmitter fifo size (NetBSD users recently reported >problems with external devices not being able to handle 16 bytes >of buffering in the transmitter, because CTS flow control doesn't >work for bytes that have been put in the tx fifo). The ioctls >should be supported by comcontrol(8). Indeed. -- Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team. http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox. whois: [PHK] | phk@tfs.com TRW Financial Systems, Inc. Power and ignorance is a disgusting cocktail.