RGTU Question Paper Computer System and Organization BE 4th Sem June 2008

RGTU Question Paper

Computer System and Organization BE 4th June 2008



Note:      Attempt any five questions.  All question carry equal marks.

1.       (a)  Draw and explain the structure of Von Neumann machine.

(b)  Define the following

(i)   Memory address register      (ii) Memory data register

(iii)    Instruction registers               (iv) Accumulator

(v)     Programme counter

(c)  Show that the statement:

A ? A+A

Symbolize a shift-left micro-operation

(d)   Explain the function of the following instruction .also list the micro operation of control

function associate with each.

(i)   AND          (ii)  ADD

2.      (A)   Define the following terms :

(i) Control memory         (ii) Microprogramming sequencing

(iii) Address sequencing   (iv) Micro instruction sequencing

(iv)  Register transfer language

(b)    Differentiate between the following:]

(i) Hardwired control unit and microprogramed control unit.

(ii) Instruction level and microinstruction level instruction execution.

©      A  microprograme  sequences uses a register stock eight level deep. Draw the block diagram of

the sequence formulate the sequence of internal operation which are required to implement

the call and return from subroutine micro instruction.

3.   (a)    Derive the algorithm in flow chart from for the addition and the subtraction of fixed point

Binary number in sign magnitude represtation with subtraction done by a parallel sub tractor

(E.A?A-B).Show one stage of the adder subtract or circuit with an  add –subtract control (ASC).

(b)    Show that contents of register A,E,Q and SC during the process of multiplication of to binary

numbers  11111 (multiplicand) and 10101 (multiplier) .The signs are not included.

4.   (a)     Differentiate between the following

(i)  I/O program control transfer and DMA transfer

(ii)  Isolated I/O and memory mapped I/O

(b)     How many character per second can be transmitted over a 1200 band line in each of the

following modes? (Assume a character code of eight bits) :

(i) Asynchronous transmission with two stop bits.

(ii)  Asynchronous transmission with one stop bits.

©     What is basic advantages of priority interrupt over a non-priority system? It is possible to have a

priority interrupt without a mask register?

5.    (a)    What is cache memory ? Discuss the basic design of cache.

(b)   A microprocessor uses RAM chips of 1024 × one capacity

(i)  How many chips are needed and how should there address lines be connected to provide a

memory capacity of 1024 bits?

(ii) How many chips are needed to provide a memory capacity of 16K bytes? Explain in words

how the chip are to be connected to the address bus.

6.     (a)   Draw the diagram for a pipeline processor  structure. Explain the necessity of a lotus or input

register and processing circuits within a segment.

(b)   Explain the following terms:

(i)  Pipeline conflicts

(ii)  Data dependency

(iii) Priority interrupts

(iv)  Memory hierarchy

7.       (a)    Draw the flowchart and explain how  division of two fixed point binary numbers in sig–

magnitude representation is carried out.

(b)   With the help of suitable flowchart explain the interrupt initiated data transfer operation.

Discuss its relative’s advantages and disadvantages.

8.        (a)   Micro instruction format

(b)   Virtual memory

© Universal asynchronous receiver transmitter.

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