6B15CSC: Computer Organization
Module I
Basic structure of computer-Types of computers-Functional Units-Basic
operational Concepts-Bus structure-Multiprocessors and Multi computers-Data
representation-Fixed Point representation and floating Point representation.
Module II
Register Transfer and Micro operations – Register Transfer language-Register
Transfer-Bus and memory Transfer-Three state bus buffers-Memory Transfer-Basic
Computer Organization and Design – Instruction Codes – Fetch & Decode Instructions –
Register Reference Instructions – Memory Reference Instruction – Input output &
Interrupt.
Module III
Micro Programmed Control – Control Memory – Address sequencing – Central
Processing Unit – General Register Organization – Control word – Stack Organization –
Register stack - Memory Stack – Reverse Polish notation – Evolution of Arithmetic
expressions – Instruction Formats – Addressing modes – Data Transfer and
Manipulations – reduced Instruction set computer(RISC)
Module IV
Input Output Organization – Peripheral Devices – Input/Output Interfaces –
Asynchronous Data Transfer – Modes of transfer –Priority Interrupt – Direct Memory
Access (DMA) - Input Output Processor - Serial Communications.
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BOS Computer Science 2014 Kannur University
Module V
Memory Organization – Hierarchy – Main memory – Auxiliary Memory –
Associative Memory – Cache memory – Mapping – Multiprocessors – Characteristics of
multiprocessors - Inter connection structures – Inter Processor Arbitration.
Text Books
1. Computer system Architecture –M.Morris Mano - PHI Pvt Limited
2. Computer Organization - Carl Hamacher –International Edition
References
1. Computer Organization and Architecture, William Stallings, 7th Edn, Pearson
Education.
2. Computer Architecture & Organization John P Hayes –Mc Graw Hill
Model Question Paper
Time: 3 Hrs Max. Marks: 40
SECTION A
1. One word answer (8 x 0.5 = 4 marks)
a) The type of the addressing mode in which the effective address is equal to the
address part of the instruction is ………………..
b) The register that hold the address of the stack is……..
c) The data register is some times called……………..
d) The transfer of information from a memory word to outside environment is …………
e) The third state of three state bus buffer is ……………
f) Which condition can be detected by observing the carry into the sign bit position
and the carry out sign bit position………..
g) If the most significance digit of mantissa of floating point number is non zero then
the number is said to be ………….
h) The register that keeps track of address of the instruction is to be executed is called
…………
SECTION B
Write short notes on ANY SEVEN of the following questions (7 x 2 = 14 marks)
2 Explain the relative address mode
3 What are the difference between the multiprocessors and multi computers?
4 Explain floating point representatives.
5 What is a register transfer?
6 What is an effective address?
7 Write three memory references instructions.
8 What is an interrupt cycle?
9 What are the major phases of operation of control unit when go through an
instruction cycle?
10 What is RISC?
11 Explain base register address Mode.
SECTION C
Answer ANY FOUR of the following questions (4 x 3 = 12 marks)
12. Explain base register address mode
13. Explain different Auxiliary Memory types
14. Explain 2’s complement addition and 2’s complement subtraction.
15. Explain address sequencing
16. What is the general register organization?
17. Explain the register indirect mode.
SECTION D
Write an essay on ANY TWO of the following questions (2 x 5 = 10 marks)
18. Explain the fixed point and floating point representation
19. Explain the direct memory access in detail.
20. Explain different addressing modes.
21. Write a detailed note on instruction cycle describing the various steps involved
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