Isochronous is derived from the greek iso , which means uniform, and chronos , which means time. This means data is transmitted at guaranteed regular intervals. Most people think of this in terms of guaranteed bandwidth, but the timing is important too such that transmission will not be bursty. Isochronous channels for data transmission is a primary feature of the IEEE 1394 bus. The bus can handle up to 64 simultaneous channels.
Digital video is a good example example of isochronous data.
If the drivers fail to unload you must reboot. The commands for this step are purely an oversimplified example. Install the kernel as you normally do. Remember, an understanding of kernel compilation and installation is a pre-requisite to the installation of ieee1394 and is beyond the scope of this document. First of all, video1394 only works with OHCI compliant adapters and the ohci1394 driver.