CO (BCA 2nd)

UNIT - I

Computer Organisation: Evolution of Computers, Von Neumann Architecture,

Combinatorial Blocks : Gates, Half Adder, Full Adder, Multiplexers, Decoders, Encoders;

Sequential Building blocks : Flip Flops, Registers, Counters,

Information representation: codes, fixed and floating point representation

Arithmetic: Addition and subtraction for sign magnitude and 2's complement numbers,integer multiplication using Booth's algorithms

UNIT - II

Architecture of a Simple Processor: Architecture of 8086/8088 microprocessor,instruction set, Addressing Modes.

Instruction: Microinstructions: Register Transfer, Arithmetic, Logical and Shift, Types of Instructions, Instruction Cycle.

Interrupt: Types, Interrupt Cycle

I/O organization: Strobe based and Handshake based communication, DMA based data transfer;

UNIT - III

Memory Organisation: Memory Hierarchy, RAM (Static and Dynamic), ROMAssociative memory, Cache memory organisation, Virtual memory organisation.

 Assembly Language: Features of Assembly Language, Machine Language vs Assembly Language, Pseudo Instruction; use of Assembly for programs: Addition, Subtraction, Multiplication using Subroutines and Basic Input/ Output.

UNIT – IV

System Maintenance: Introduction to various physical components of a computer, Physical Inspection and Diagnostics on PC, Functional description of various Internal and Externalcards; 

Viruses: Types of Computer Viruses, Detection, prevention and protection from Viruses.