> Hm, there is nothing like "plain text" when
> faxing. Faxes only "understand" bitmapped
> graphic data coded according to the standards
> mentioned by Alex. Your PIC has to create
> the bitmap (possibly one "row" at a time, but
> anyway) before sending it to the modem.
>
> So if you'd like to send a line of text, you have to
> first send the upper "dots" of each individual
> character on that line. Then start at the beginning
> of the same line but one "pixel" below and start over.
>
> In a way "emulate" what the scanner part of an old-time
> fax machine did.
>
> Maybe, just *maybe*, there *could* be a reason you
> havn't seen this idea before :-)
>
> Now, everything would have been different if therer was
> modems with the raster engine builtin. I havn't seen
> anything like that...

This really isn't hard.  I've got a 16C66 driving a bitmapped LED display at
around 37Hz.  Only the text is stored.  The pixels get generated on the fly
from the font table in right in the program memory of the PIC.  See
http://www.embedinc.com/ourportfolio.shtml#eyeball.  The required fax data
rate is a lot lower, and nothing breaks if you don't send a byte as fast as
possible.


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