Hi,

Our goal is to develop a system that will be able to work with almost
all existing Point of sale (POS) printers designed to be connected to
the rs232 serial port of a cash register. We know the escape sequences
used for line feed, carriage return, characters formatting, paper
cutting... might be defined specifically for each model of printer and
we can live with that.
What about the status command sequences? I read the programming
manuals of two different models (Epson TM-T90 and Axiohm TPOS Printer
Series). Both are using the same sequences (&H10 &H04 and 1,2,3 or 4
depending on the type of status (Printer status, offline status, error
status and paper status))
Since I can't conclude there really is a standard with so few
conclusive examples, my question is : Are these status codes being
dictated from a recognized standard or is it pure luck?

Thanks

Stephane Belzile