From owner-freebsd-hardware  Wed May 21 07:11:50 1997
Return-Path: <owner-hardware>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id HAA11797
          for hardware-outgoing; Wed, 21 May 1997 07:11:50 -0700 (PDT)
Received: from lariat.lariat.org (ppp0.lariat.org@[129.72.251.2])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id HAA11787
          for <HARDWARE@freebsd.org>; Wed, 21 May 1997 07:11:48 -0700 (PDT)
Received: from solo.lariat.org ([129.72.251.10])
	by lariat.lariat.org (8.8.5/8.8.5) with SMTP id IAA14595;
	Wed, 21 May 1997 08:11:18 -0600 (MDT)
Message-Id: <3.0.1.32.19970521080515.0075bc30@lariat.org>
X-Sender: brett@lariat.org
X-Mailer: Windows Eudora Pro Version 3.0.1 (32)
Date: Wed, 21 May 1997 08:05:15 -0600
To: Bruce Evans <bde@zeta.org.au>, gurney_j@resnet.uoregon.edu
From: Brett Glass <brett@lariat.org>
Subject: Re: isa bus and boca multiport boards
Cc: HARDWARE@freebsd.org, rberndt@nething.com, WELCHDW@wofford.edu
In-Reply-To: <199705210705.RAA10446@godzilla.zeta.org.au>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Sender: owner-hardware@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

At 05:05 PM 5/21/97 +1000, Bruce Evans wrote:
 
>I try to avoid it, and enjoy making serial drivers written in C several
>times more efficient than previous and competing versions written in
>assembler :-).

How about the best of both? By your own analysis, any approach that avoids
extra ISA I/O operations is a big win. So is any solution that can drop a
slew of pointer dereferences (even if the ratio is 1:16) and avoids polling
ports extra times....

--Brett