On 2008-05-13, Daniel Polak <[EMAIL PROTECTED]> wrote: > I have a system with an IDE hard disk and CF-IDE adapter. > The CF-IDE adapter works fine with CF cards of 512 MB capacity and less. > As time goes by smaller capacity cards become more difficult to find so > I bought several 1 GB Kingston CF cards. > > However these CF cards don't seem to work (on OpenBSD 4.3 stable). I > tried three empty 1 GB Kingston CF cards and they all prevent the system > from getting past loading the kernel. > I went back to a smaller card and then everything is fine. > > The error message is > type: ata > c_bcount: 512 > c_skip: 0 > pciide0:1:0: bus-master DMA error: missing interrupt, status=0x21
Your card supports DMAs, but your adapter doesn't wire the required line. This was a later addition to the CF spec, you can disable DMA with flags to wd(4). See http://lists.soekris.com/pipermail/soekris-tech/2007-May/012083.html
