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EPP?

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parallel ports fall into three categories: standard paralles port (SPP), Enhanced Parallel Port (EPP), and Extended Capabilities Port (ECP). the standard parallel port is sometimes called a normal parallel port or a Centronics port, named after teh 36-pin centronics connection used by printers. a standard port allows data to flow in only on direction and is the slowest of the three types of paralles ports. epp and ecp are both bi-directional. ecp was designed to increase speed over epp by using a dma channel; therefore, when using ecp mode you are using a dma channel. over the years both hardware and software manufacturers have performance. to help establish industry standards, a committe supported by the Institute of Electrical and Electronics Engineers (IEEE) was formed in the early 1990s and created the IEEE 1284 standards for parallel ports. these standards require backward compatibility with previous parallel port technology. both epp and ecp are covered under teh IEEE 1284 specifications.
 
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