On Mon, 10 Feb 2003, Zane Gilmore wrote: > Do the arithmetic,
Yes, thank you, Zane, I had also done that calculation. > 300 dpi, A4 pages are approx 8*11inches at approx 3 byte colour depth > > (300*8)*(300*11)*3 /(180seconds) (3 minutes) > > approx=132000 which is approx the speed of a printer port isn't it? That looks pretty low to me - was that in the good old days when they used some of the status lines for getting data the other way up? But as I said, I am not a parport expert, and so I had (incorrectly?) assumed the EPP transfer rate to be in the range between 500 kB/s and 2 MB/s, which would actually be much faster than what I got. Is there a way to find out how fast the port really is? I mean, without scope or logic analyzer :-) I would rather know where the bottleneck is: Is it the scanner firmware & controller? Is it the parport? Is it the sane backend? The answers to this question will obviously be quite different, depending on the machine and scanner. Kind regards, Helmut. +----------------+ | Helmut Walle | | [EMAIL PROTECTED] | | 03 - 388 39 54 | +----------------+
