Dear sir, Good afternoo. Recently I have became member in AAC. I'm intrested in this project ie 144LED message scroller/Game consol. Please let me know how should I connect PC serial port to the project.

 

The original thread seems to be closed - http://forum.allaboutcircuits.com/showthread.php?t=34360

You may not be able to contact the OP for details, although serial communications are usually not too hard.