Does anyone know how the Verifone Printer 900 works? I'm unable to print from Windows, can't find anything like a driver.
I'm already using a serial to USB adapter. I'm using COM3.
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It appears to be a specialised receipt-printer for a point-of-sale (POS) system, not a general purpose printer for other Windows applications.
You could try treating it as a dumb text printer (though no doubt it is capable of more). In XP for example you can use Start, Printers; Add a Printer, ... select Manufacturer "Generic", Model "Generic / Text Only".
If that works, you can move on to see if it is compatible with ancient dot-matrix devices like the Epson MX-80 or the IBM Proprinter.