ABSTRACT
Next, start BS1. It will bring up a dialog where you can pick what file you want to open. After you open the file, the main screen will appear. At the top of the window are eight LEDs that show your outputs (black is 0, red is 1, and hollow means the pin is an input). Below that are eight buttons that represent your inputs. Black is a zero input and green is a one input. Below that are several special I/O locations. Below that are all the W and B registers along with the PORT register. You can modify the W registers by typing over the numbers already there. At the very bottom of the screen, you will see a decoding of the next statement to execute (which may look a little odd, compared to your original source, but you’ll be able to figure it out).
