From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3C3C8091.8070300@humboldt.co.uk> Date: Wed, 09 Jan 2002 17:40:33 +0000 From: Adrian Cox MIME-Version: 1.0 To: linuxppc-dev@lists.linuxppc.org Subject: Re: ISA DMA take 2 References: <0201091721.AA22295@ivan.Harhan.ORG> Content-Type: text/plain; charset=us-ascii; format=flowed Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Michael Sokolov wrote: > What's your memory map? Do you put the bottom 16 MB of main memory in the > bottom 16 MB of the PCI memory space on the PCI segment with the Via without an > I/O hole? Yes - and I set ISA_DMA_THRESHOLD to 0x00ffffff. It's not possible to use ISA DMA with the Via southbridge unless you have main memory at 0x0 on the PCI bus. Of course, if anybody knows a cheap southbridge with 32-bit ISA DMA, UDMA100, and maybe USB, it would be nice to hear of it for future boards. -- Adrian Cox http://www.humboldt.co.uk/ ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/