Hi, Does anyone know about user space device driver on Linux? I wonder how the driver access the device registers(by MMIO and IOIO and PCI configuration space) ? Thanks for any help from you, Rita - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html