From owner-freebsd-hackers Sat Jul 20 12:25:50 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id MAA08687 for hackers-outgoing; Sat, 20 Jul 1996 12:25:50 -0700 (PDT) Received: from ref.tfs.com ([206.245.251.1]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id MAA08681; Sat, 20 Jul 1996 12:25:49 -0700 (PDT) Received: (from julian@localhost) by ref.tfs.com (8.7.5/8.7.3) id MAA04650; Sat, 20 Jul 1996 12:25:38 -0700 (PDT) Message-Id: <199607201925.MAA04650@ref.tfs.com> Subject: Re: Advice on PCI driver for RISCom/N2pci needed To: jhay@mikom.csir.co.za (John Hay) Date: Sat, 20 Jul 1996 12:25:37 -0700 (PDT) From: "JULIAN Elischer" Cc: hackers@FreeBSD.ORG, davidg@FreeBSD.ORG In-Reply-To: <199607200943.LAA12950@zibbi.mikom.csir.co.za> from "John Hay" at Jul 20, 96 11:43:32 am X-Mailer: ELM [version 2.4 PL25 ME8b] 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 there were people asking about using IPX.. have you answered them? I don't think anyone else knows much about it.. > > Hi > > I am busy looking at writing a driver for the SDL RISCom/N2pci card. > > The card uses the same Hitachi HD64570 chip as the Arnet and RISCom/N2 > ISA cards and only have a 24 bit address bus, which means that while > it is a bus master card, its DMA can only "work" in a 16MByte block. It > does have a page register so you can select any 16M block to work in. > > At the moment it looks like the only option is to pre allocate a block > of memory below 16M (maybe using the method BOUNCE_BUFFERS use???) and > copy the mbufs in and out of that. > > Is there somebody with better/other ideas? > > John > -- > John Hay -- John.Hay@mikom.csir.co.za >