Whether or not the system is loaded or not depends mainly on what
hardware you have. OHCI tends to load the system a lot less than UHCI
(Intel).
But compared to serial and parallel ports, USB is a lot better. Most of
the transaction is done per DMA and with large quantities it outperforms
both of them in every way. 300Kb/s at less than 1% CPU should be no
problem. I have no idea what the load on the PCI bus is though. That
might be a problem as there are a lot of small transfers over that bus.
By the way, at the moment it is better to have a UHCI controller on
your motherboard. Allthough the OHCI controller is much smarter and more
efficient, support for it is not as stable as the support for UHCI
controllers.
Nick
> A co-worker is looking into buying a printer, and was wondering which
> kind would be better, USB and/or parallel. (There are also some that do
> both).
>
> Parallel printers tend to load down the system when busy, but serial
> devices tend to load them down even more, although USB is a whole
> different animal.
>
> What are the trade-offs?
>
> Thanks for any help you can provide!
>
>
> Nate
>
>
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