From owner-freebsd-questions Fri May 22 05:43:48 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id FAA13254 for freebsd-questions-outgoing; Fri, 22 May 1998 05:43:48 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from relay.ucb.crimea.ua (relay.ucb.crimea.ua [194.93.177.113]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id FAA13181 for ; Fri, 22 May 1998 05:42:31 -0700 (PDT) (envelope-from ru@ucb.crimea.ua) Received: (from ru@localhost) by relay.ucb.crimea.ua (8.8.8/8.8.8) id PAA02105; Fri, 22 May 1998 15:42:10 +0300 (EEST) (envelope-from ru) Message-ID: <19980522154209.A1824@ucb.crimea.ua> Date: Fri, 22 May 1998 15:42:09 +0300 From: Ruslan Ermilov To: FreeBSD Questions Subject: Questions about Bus Mastering Mail-Followup-To: FreeBSD Questions Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91i X-Operating-System: FreeBSD 2.2.6-STABLE i386 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hi! Bus mastering... What I know about it? This is the PCI technology similar to DMA channels on the ISA bus. It allows adapters to control the bus. Thus, they can deliver their data directly to RAM, minimizing the workload on the CPU. Am I right? Questions: 1. What existing hardware supports bus mastering: SCSI host adapters, IDE controllers, Network adapters? (examples, please) 2. Does FreeBSD support bus mastering and for which hardware? Thanks, -- Ruslan Ermilov System Administrator ru@ucb.crimea.ua United Commercial Bank +380-652-247647 Simferopol, Crimea 2426679 ICQ Network, UIN To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message