Hi, On Saturday 10 July 2010 23:16:40 Harry Van Haaren wrote: > Advantages of firewire approach: > 1. Bus design. Internally, the firewire chip doesnt have to ask the CPU to > copy data > to its port, it just does it, while USB devices use the CPU for this task. > 2. On cheap laptops (and unfortunat others) the IRQ's between USB & > something else > collide. This means worse performance. (I'm aware that Firewire IRQ's can > collide too, > but I've never seen that phenomena before.) > 3. Firewire daisy chaining does still exist, at least for the Echo > Audiofire devices that I have. > 4. I run a laptop (so PCI / PCI-E and a lot of other options are out. ) > 5. From my experiences, Firewire devices seem to be more geared towards > professional use, > while USB targets the "pro-sumer" market. (No flame bait intended here..) Here are more firewire-advantages: 6. Synchronous transport for streaming data. Also streaming stuff is initiated by the device, not by the cpu. 6.5 This results in a bus-wide clock to sync devices which enables the daisy- chain usage of multiple devices. 7. Guaranteed bandwidth and latency (up to a certain maximum), devices will not steal each others time as with usb. The IRQ-problems applies to all pci, usb and firewire the same. If the interrupts collide and you can't change them, it will not work... Have fun, Arnold
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