BCS1120-1 Intro to Computing

Lecture notes

Van Neumann Architecture

• Described a computer with main components
  • Control unit → Implements the sequential order of instructions
  • Arithmetic Logic Unit
  • Memory
  • Input and Output → Need to compensate for speed differences
• Stored program concept → storing a program in memory
• Sequential execution of instructions
• Machine language
• Assembler (Assembly) → intermediary between human programming language and machine learning

Memory

Each memory cell has unique address (4bits) and XXX

• RAM (Random Access Memory) → Volatile
• ROM (Read Only Memory) → They store very basic functionality needed to run OS or programs
• Mass Storage Devices → USB, SSD, Hard Drives, Sequential Access Disks (e.g. tape)

Execution cycle

1. Program in memory → instruction is fetched
2. Processor (CU and ALU) → Decodes and executes instruction
3. Processor requests for next instruction (Sequential)

Programming languages

• Compiled languages
• Interpreted languages

Compilation process

• get screenshot from slide

Java and JVM

• OOP Oriented
• Interpreted → Java Virtual Machine
• Multithread
• General-Purpose

Summary

• Book Chapter 1
• Read Game Lap 1 Student Handbook for Friday

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Explained theory

Lecture slides