From owner-freebsd-hackers Mon May 27 17:32:46 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id RAA13524 for hackers-outgoing; Mon, 27 May 1996 17:32:46 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id RAA13511; Mon, 27 May 1996 17:32:36 -0700 (PDT) Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) id KAA29356; Tue, 28 May 1996 10:18:47 +0930 From: Michael Smith Message-Id: <199605280048.KAA29356@genesis.atrad.adelaide.edu.au> Subject: Re: Re(2): SCSI hostadapter To: terry@lambert.org (Terry Lambert) Date: Tue, 28 May 1996 10:18:46 +0930 (CST) Cc: Andrew.Gordon@net-tel.co.uk, freebsd-scsi@FreeBSD.ORG, j@uriah.heep.sax.de, freebsd-hackers@FreeBSD.ORG In-Reply-To: <199605272126.OAA09109@phaeton.artisoft.com> from "Terry Lambert" at May 27, 96 02:26:59 pm MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Terry Lambert stands accused of saying: > > > > This particular card does not support interrupts (it doesn't even have any fingers on the connector for any of the IRQ lines). ... > This is typically an artifact of having the interrupt set incorrectly. This message is an artifact of Terry spending too long awake 8) > I'd caution you that it's also possible that it's just a dog-slow > interface, so there may be nothing to be done about it. A good 5380 clone in a good DMA environment can manage around the 2M/sec mark sustained (eg. the LOGIC 53C80 in the Atari TT). Without this, and with no interrupts, you're kinda restricted in your total data rate 8( > Terry Lambert -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[