I received my PAL-1 kit yesterday, and built it up. I am able to load programs through the keypad with no problem. If I go back and check the contents of RAM, everything is loaded as expected. When I enter the address to run the program and hit GO, the display blanks and never returns. The only way to get the display back is to hit the RS button. I have tried simple programs that I wrote, and simple programs that others have written, like adding two numbers, and all do the same thing. I have tried locating the program at different RAM locations with no luck. I have visually inspected all solder joints, and pins on the IC's, and all look good.
Any thoughts?
John