Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 14 Jul 2017 My Price 11.00

multiplexor channel

  1.      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

          10s     IRQ1

             10

Answers

Maurice Tutor
(5)
Status NEW Posted 14 Jul 2017 09:07 PM My Price 11.00

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