In most countries it is required fiscal block to control printer and each slip is formatted by TAX Counter according to special rules. In this case it is not allowed to connect PC directly to printer, only fiscal block has access to it. Fiscal block should know how to handle printing device. Most printersĀ supports 90% of Epson ESC command system, but there areĀ also some variations. Architecture of Taxcounter allows it to learn different "dialects" of ESC commands and event printer commands that are not related to Epson ESC system. From firmware point of view this allows to connect any printer to fiscal block.