Name:____________________________

CMIS 310

HOMEWORK #6 – Week #6

 

This homework is worth 10% of your course grade.

 

Read each problem carefully.  Failure to follow the instructions for a problem will result in a zero score for that problem.

 

Submit the completed Homework via Assignment in LEO.

 

     A 32-bit computer has two selector channels and one multiplexor channel. Each selector channel supports two magnetic disk and two magnetic tape units.  The multiplexor channel has two line printers, two card readers, and five VDT terminals connected to it.  Assume the following transfer rates.

            Disk drive                               700 Kbytes/s

            Magnetic tape drive                200 Kbytes

            Line printer                             6.6 Kbytes/s

            Card Reader                            1.2 Kbytes/s

            VDT                                        1 Kbytes/s

Estimate the maximum aggregate I/O transfer rate in this system.   

 

 

2.        Given the following set of events, show which routines the CPU is executing for times 0 to 100 ns.  Each handler routine (with its interrupt request) takes 20 ns to complete.  The priority of the interrupts ranges from IRQ6 as the highest priority interrupt to IRQ0 as the lowest priority interrupt.

 

Time	Action
0 ns	Start of main program
10 ns	IRQ1
25 ns	IRQ4
40 ns	IRQ6
50 ns	IRQ3

            Time                Action

 

            0 ns:                 Start of Main Program

s:                IRQ1

 

 

 

1. Do Exercise 8 in Chapter 7 (Input/Output and Storage Systems) of Null and Lobur

 

1. Do Exercise 11 in Chapter 7 (Input/Output and Storage Systems) of Null and Lobur

 

1. Do Exercise 19 in Chapter 7 (Input/Output and Storage Systems)  of Null and Lobur

 

Name:____________________________CMIS 310HOMEWORK #6 – Week #6This homework is worth 10% of your course grade.Read each problem carefully.Failure to follow the instructions for a problem willresult in a zero score for that problem.Submit the completed Homework via Assignment in LEO.1.A 32-bit computer has two selector channels and one multiplexor channel. Eachselector channel supports two magnetic disk and two magnetic tape units.Themultiplexor channel has two line printers, two card readers, and five VDTterminals connected to it.Assume the following transfer rates.Disk drive700 Kbytes/sMagnetic tape drive200 KbytesLine printer6.6 Kbytes/sCard Reader1.2 Kbytes/sVDT1 Kbytes/sEstimate the maximum aggregate I/O transfer rate in this system.2.Given the following set of events, show which routines the CPU is executing fortimes 0 to 100 ns.Each handler routine (with its interrupt request) takes 20 ns tocomplete.The priority of the interrupts ranges from IRQ6 as thehighest priorityinterrupt to IRQ0 asthe lowest priorityinterrupt.TimeAction0 nsStart of main program10 nsIRQ125 nsIRQ440 nsIRQ650 nsIRQ3TimeAction0 ns:Start of Main Program10 s:IRQ13.Do Exercise 8 in Chapter 7 (Input/Output and Storage Systems) of Null andLobur4.Do Exercise 11 in Chapter 7 (Input/Output and Storage Systems) of Null andLobur1

5.Do Exercise 19 in Chapter 7 (Input/Output and Storage Systems)of Null andLobur2

Attachments:

• 1494306505-C310-HW6.doc