On Sun, 20 Mar 2005 22:55:44 -0500, Andr� Pouliot <[EMAIL PROTECTED]> wrote: > The main problem is one of this chip market is embedded system, not only > x86. And some architecture, like in embedded, sometime doesn't support > DMA, they do support PIO and basic interfacing mode, but DMA is alien. > To be able to use DMA you need hardware and software supporting it and > you don't find it everywhere, even if it seem smarter to have it.
Exactly. In fact, in some cases, what would typically be a PIO for most systems ends up being an indirect process. Say you had a microcontroller that could only address RAM as pointer deference, and all I/O were done via special I/O instructions. No possibility of doing DMA, and even PIO isn't so nice anymore either. It can happen. _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
