problem 3: A PPI configuration is shown below 00-07 PA PS IOR RD IOW 4WR. PCL AD A3 A1 CS PCU AO AZ A4 A5 AD A7 1. Find the port address for the 8255 ports and control register? 2. What is the lo mode of operation for ports A and B if no handshaking is required? 3. Program the 8255 to move data from Port-C Lower (PCL) to Port-C Upper (PCU)? Make sure to include some comments in your code telling what you are doing. 4. Use PC6 to generate a square wave of 25% duty cycle continuously. This should be triggered after PC2 signal is set high. problem 3: A PPI configuration is shown below 00-07 PA PS IOR RD IOW 4WR. PCL AD A3 A1 CS PCU AO AZ A4 A5 AD A7 1. Find the port address for the 8255 ports and control register? 2. What is the lo mode of operation for ports A and B if no handshaking is required? 3. Program the 8255 to move data from Port-C Lower (PCL) to Port-C Upper (PCU)? Make sure to include some comments in your code telling what you are doing. 4. Use PC6 to generate a square wave of 25% duty cycle continuously. This should be triggered after PC2 signal is set high