A simple Parallel Port(LPT port) tester that controls the LED state of each digital I/O pins using inpout32.dll.
The prototype board of the this pararallel-port controller can be found here. Created using KiCAD which is a free software, a cross platform and open source electronics design.
Parallel Port Control helps me on how to use inpout32.dll.
KiCAD IDE letting me use a free software in designing PCB.