Date: Mon, 30 Aug 1999 10:22:06 -0400 From: "Cote, Jeffery" <Jeffery.Cote@lmco.com> To: "'questions@freebsd.org'" <questions@freebsd.org> Subject: DMA limits? Message-ID: <c=US%a=_%p=LMCO%l=CDA-SK-EMS-990830142206Z-878@mon-exchange.lmcda.lmco.com>
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We are currently looking to use the DMA to transfer data on a byte by byte basis from a given memory location to an I/O device. Currently we are having problems with the 64k barrier encoutered with the data segments for we are transferring data from a large array. Will we encounter this problem with the DMA transfer as well or is the DMA capable of accessing the full 4G physical memory pool (using an 8237 chip set)? thanks To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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