I am fighting to get any one of 5 different simple ZYBO demos to work. At all. I can download bitfiles with my own Verilog code and blink, or scan, or pulsate the LEDs, and get behaviour changes based on buttons and switches ... so I know the board works, but nothing I do with the with the processor core (PS block) works. I am here looking for information on how to get some kind of information out of the board so I can figure out what's going on. The demo I am working on now is this one: