Date: Sun, 23 May 1999 14:16:48 -0700 From: Kent Stewart <kstewart@3-cities.com> To: Orlando Andico <orly@mozcom.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: IDE U/DMA on non-Intel chipsets Message-ID: <37487040.45753CA@3-cities.com> References: <Pine.BSF.3.96.990524023008.2553A-100000@ice.mozcom.com>
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You can either configure the system at boot or add it to your kernel. The typical setting is "flags 0xa0ffa0ff" but if your are using LBA that becomes 0xb0ffb0ff. I went from 3.8MB/s to 8MB/s on reads. The writes were only 1.7 times faster. You can add these parameters to your wd0 and/or wd1 by booting and configuring. Kent Orlando Andico wrote: > > I noticed from searching the mailing list archives that busmastering DMA > is supported on Intel chipsets. I'm currently using 3.0 at home, and I get > the following information from my dmesg(1): > > .. > ide_pci0: <VIA 82C586x (Apollo) Bus-master IDE controller> rev 0x06 on > pci0.7.1 > .. > > Does this mean that bus-mastering DMA is being used? how can I turn it on > if not? does a later version support the VIA Apollo? (it's actually an > Apollo Pro 82C591 on a Slot1 board) > > ------------------------------------------------------------------- > Orlando Andico <orly@mozcom.com> +63 (2) 937-2293 > Mosaic Communications, Inc. +63 (912) 800-8262 > Promote bacteria.. it's the only culture some people have. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- Kent Stewart Richland, WA mailto:kstewart@3-cities.com http://www.3-cities.com/~kstewart/index.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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