1. Write a program counts the number of pushes of a button. The display should show the value. 2. Modify the program developed in Exercise so that it outputs the count value to the parallel port. 3....

1. Write a program counts the number of pushes of a button. The display should show the value.

2. Modify the program developed in Exercise so that it outputs the count value to the parallel port.

3. Modify the program developed in Exercise 16.6.14 so that the display is incremented when the user presses a button.

4. Write a program in which the user presses a button which causes the program to read from the parallel port.

5. Write a printer driver in which a string buffer is passed to it and this is then outputted to the printer. The driver should include all the correct error checking (such as out-of-paper, and so on).