"GDI" means "Graphical Device Interface" and is a software API created by Microsoft through which applications communicate with the drivers of graphical output devices, as printers or graphics cards. "GDI" is not a hardware protocol, the hardware protocols of GDI printers can be completely different, even between models of the same manufacturer. For Windows users this is no problem, as every printer comes with a driver CD containing a driver exactly for the particular printer.
guy wrote:Have you tried asking the Epson support folks as I suggested above to the OP?
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