If you have access to

Operating Systems, Gary Nutt, Third Edition, Addison Wesley, ISBN: 0-2-0177344-9, 2003

or

Unix System Programming, K.A. Robbins and S. Robbins, Prentice Hall, ISBN: 0-13-042411-0, 2003

Please refer to Figure 5.7 Polling I/O Read operation in the textbook

1.a What information does the status register include? (4 points)

1.b Please use a while-loop to implement step 4 in Figure 5.7. (6 points)

1.c How do you use the information in the status register to implement step 2? Please use a while loop to write down the pseudo-code. (5 points)