Interfacing is all about controlling objects in the real world electronically. Our interfacing device is the parallel port, information can flow back and forth between computer and peripherals through the parallel port. The parallel port has 25 pins. Pins 2-8 are used to output information from the computer. Pins 15, 13-10 are used to input information to the computer. Pins 18-25 are ground pins as you can see in the diagram to the right. The command “parallelget()” is used to read the parallel port. The "parallelput()" command is used to output a something from the parallel port.
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