IT402 Unit 3
Computer Architecture

CPU & Instruction Format

Unit 3 Study Material

Download detailed notes, important questions and PYQ analysis for IT402 Computer Architecture Unit 3.

🖥️ CPU

CPU executes instructions and controls all processing operations in a computer system.

📚 Stack

Stack organization stores data using Last In First Out method.

🔌 DMA

Direct Memory Access transfers data between memory and I/O without CPU involvement.

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Detailed Notes

Complete notes on CPU, stack organization, memory stack, Reverse Polish Notation, instruction formats, RISC, CISC, addressing modes, interrupts, DMA and Input-Output Processor.

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Important Questions

Important RGPV questions on stack organization, instruction formats, zero, one, two and three address instructions, RISC, CISC, addressing modes, priority interrupt and DMA.

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PYQ Analysis

Previous year questions and repeated topics from Computer Architecture Unit 3 for quick exam revision.

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Unit 3 Topics

Central Processing Unit
CPU
Stack Organization
Memory Stack
Reverse Polish Notation
Instruction Formats
Zero Address Instructions
One Address Instructions
Two Address Instructions
Three Address Instructions
RISC Instructions
CISC Characteristics
RISC vs CISC
Addressing Modes
Immediate Addressing Mode
Direct Addressing Mode
Indirect Addressing Mode
Register Addressing Mode
Indexed Addressing Mode
Modes of Transfer
Programmed I/O
Interrupt Initiated I/O
Priority Interrupt
Daisy Chaining
Direct Memory Access
DMA
Input-Output Processor
IOP