Hi there, I have found http://www.kernel.org/doc/htmldocs/uio-howto.html on writing userspace io drivers. Also I have found drivers/uio in the kernel source tree. As far as I understand, uio_aec.c uio_cif.c uio_pci_generic.c uio_pdrv_genirq.c uio.c uio_netx.c uio_pdrv.c uio_sercos3.c are the minimal kernel part of these drivers. Are there any implemented userspace drivers? Where can I see source code for them? Best Wishes - Gergely _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel