solutions for increasing the number of pc parallel port control and selecting lines
The paper approaches the problem of control and selecting possibilities offered by the PC parallel port. Although it is the most frequently used PC port for controlling external applications, the parallel port has severe limitations in generating chip select and control signals. Their number can be increased by using the parallel port data lines, extra hardware and specific routines. Higher speed can be obtained if the EPP and ECP modes are used. Techniques for increasing the number of chip select and control signals generated by the PC parallel port are presented and analyzed.
pc parallel port enhanced parallel port (epp) extended capability port (ecp) ieee 1284