>
> > Are all devices of this nature parallel?
> > and if so what code and I/O overhead is needed.
>
>Certainly not.  Serial based receipt printers are quite common.

I missed the meaning of this the first time around.

All non-PC receipt printers, except for a very few on specialized systems,
are serial.

You will likely need to learn to emulate a verifone P-250, which is itself
a broken emulation of an epson printer. Also some of the commands are
improperly documented, and even the P-250's bugs are used by some
customers, so you'll have to emulate those as well.

A couple years ago, I wrote a test suite in a Tranz-330 to test P250
emulation. I may still have the code.

Buy a couple cases of paper :)

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu