> Is it not possible for Windows (or any OS) to open up DMA for a device > only to a certain range? > > If not, what options are available? I have various forms of RSI and don't feel like typing it again: On Thu, Mar 06, 2008 at 12:00:09PM -0800, Tim wrote: > [...] > Of course this is not an optimal fix. The drivers should just > automatically restrict the DMA accesses in real time to a range that is > safe but still permits devices to use it. (Presumably to buffers > allocated specifically for I/O.) Not sure if some devices would still > have problems with this, but I think this is the intended operation of > ieee1394 based on the specs and I'd imagine it would work on a greater > number of devices than having it disabled completely. > [...] So yes, this is possible. AFAIK, driver writers on all sides have just been lazy. At least with free OSes they have a lame hack to protect you. tim
