Boca Research 2x2, Turbo1x1 manual Introduction

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•Two Startech SPP/ECP/EPP/parallel ports

•Bi-directional port capability

•16-byte FIFO for ECP modes

•8-bit DMA channel

A Note on Parallel Port Settings

Parallel port settings are defined as follows:

Output Only. This setting defines the parallel port as a standard uni-directional I/O only port for use with a printer.

SPP (standard). This setting defines the parallel port as a standard bi-directional port for use with a printer.

EPP (enhanced parallel port). This setting defines the parallel port as an 8-bitbi-directional port for use with hard drives, tape backup systems, and other 8-bitbi-directional devices.

ECP (extended capabilities port). This settings defines the parallel port as a high-performance8-bitbi-directional port for use with hard drives, tape backup systems, high- performance printers, and CD-ROM drives. This mode also uses DMA to increase performance and reduce system overhead.

Introduction