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Farallon uses external clocking in its EtherMac and EtherWave PowerBook adapters to push data through the serial port roughly three times faster than usual. This makes an excellent way to add an older PowerBook to an ethernet network. (BTW, these adapters do not support Open Transport.)I was looking for an article/post/blog/something that mentioned the difference between the Modem and Printer ports, saying something technical about one versus the other. I can't remember where it was and it's not in my bookmarks or history. Something to do about xfering data without as much interference from the CPU or thereabouts. Maybe it was a reference to something described in Inside Macintosh...dunno.