BIO can set the Integrated Parallel port for the printer

Generally, one usually wishes to use EPP or ECP. ECP has enhanced performance but greater compatibility problems.

clipped from www.proprofs.com Integrated Parallel Port Parallel ports have various modes of operation. The original parallel ports were generally used for one-way communication from the PC to the printer. However, the newer ones include bi-directional communication and other abilities. The usual choices for this setting are: SPP: Sets the parallel port to function as a Standard Parallel Port. This is the default unidirectional (and the slowest) option. EPP: Sets the parallel port to Enhanced Parallel Port mode. This is sometimes called “Bi-directional”. ECP: Sets the parallel port up as an Enhanced Capabilities Port. This setting requires the use of a DMA channel, usually specified through another BIOS setting - The Parallel Port ECP DMA Channel setting.