ROM

Duration: 6 min

This video lesson is available to enrolled students.

Return to /learn/MPPSC-ASSISTANT-PROFESSOR-COMPUTER-SCIENCE-PAPER-2/digital-computer-organization-and-architecture/basics-of-coa/basics-of-memory/asset-rom after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. Paper 1 | General Studies: State Wise GK
  3. Paper 1 | Information and Communication Technology: Role of Internet and Web Services, Security in Mobile and Wireless Computing
  4. Paper 1 | Current Affairs: GK- Current Affairs
  5. Paper 2 | Discrete Mathematical Structure: प्रतिशतता / Percentage, अनुपात, समानुपात, साझेदारी एवं मिश्रण / Ratio, Proportion, Partnership and Mixtures, औसत / Averages, आँकड़ा विश्लेषण एवं शोध सांख्यिकी / Data Analysis and Statistics in Research, क्रमचय, संचय एवं प्रायिकता / Permutation, Combination and Probability, श्रेणी / Series, आँकड़े एवं आलेखीय निरूपण / Data and Graphical Representation, आँकड़ा निर्वचन: तालिका / Data Interpretation: Tables, Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Descriptive statistics, exploratory data analysis, Standard discrete and continuous univariate distributions, Univariate and Joint Distributions, Markov Chains
  6. Paper 2 | Digital Computer Organization And Architecture: Number System, Number Representation, Sequential Circuits, Combinational Circuit, Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Register Transfer and Microoperations, Control Unit Design, Programming the Basic Computer
  7. Paper 2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  8. Paper 2 | Programming Languages & Object-Oriented Programming Concepts: Java, OOPS with C++, Java Fundamentals, Array, String, IO & References
  9. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  10. Paper 2 | Data Structure And Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Minimum Spanning Trees, Advanced Algorithms
  11. Paper 2 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Unix OS
  12. Paper 2 | Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory
  13. Paper 2 | Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  14. Paper 2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization, Enhanced Data Models
  15. Paper 2 | Computer Network And Information Security: Introduction to CN, Data Communication, Application Layer, Hardware basics, Cyber Threats and Malware Attacks, Network Security, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP
  16. Paper 2 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  17. Paper 2 | Current Trends & Technologies: कंप्यूटर की मूल बातें और हार्डवेयर / Computer Fundamentals and Hardware, पारितंत्र और जैव विविधता / Ecosystems and Biodiversity, मेमोरी, भंडारण और डेटा निरूपण / Memory, Storage and Data Representation, कंप्यूटर सॉफ्टवेयर / Computer Software, निरुपाधिक प्रतिज्ञप्तियाँ / Categorical Propositions, ऑफिस अनुप्रयोग / Office Applications, संकेत विज्ञान एवं अर्थ / Semiotics and Meaning, मल्टीमीडिया और फ़ाइल प्रारूप / Multimedia and File Formats, कंप्यूटर नेटवर्क / Computer Networks, संचार की बाधाएँ / Barriers to Communication, उच्च शिक्षा संस्थानों के प्रकार / Types of Higher Education Institutions, इंटरनेट और वर्ल्ड वाइड वेब / Internet and World Wide Web, ई-मेल और ऑनलाइन संचार / Email and Online Communication, शिक्षण विधियाँ / Methods of Teaching, साइबर सुरक्षा / Cyber Security, डिजिटल नैतिकता, बौद्धिक संपदा और समाज / Digital Ethics, IPR and Society, शोध-प्रबंध एवं लेख लेखन / Thesis and Article Writing, डिजिटल एवं नव माध्यम / Digital and New Media, उभरती प्रौद्योगिकियाँ / Emerging Technologies, प्राकृतिक प्रकोप और आपदा प्रबंधन / Natural Hazards and Disaster Management, शिक्षा और शासन में ICT / ICT in Education and Governance, क्लाउड और वितरित कंप्यूटिंग / Cloud and Distributed Computing, Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Planning, Multi Agent Systems, Fuzzy Sets, Natural Language Processing, Artificial Neural Networks, Genetic Algorithms, Data Warehousing & Mining, Electronic Data Interchange and E-Commerce, Terms & Abbreviations
  18. Paper 2 | Full Length Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture introduces Read-Only Memory (ROM) as a non-volatile primary memory that retains data when power is off and stores the BIOS for bootstrapping. The instructor explains ROM's read-only nature, where data is permanently written during manufacturing, and compares its speed to RAM and hard disks. The lesson then transitions to specific ROM types: MROM (Masked ROM), which is hard-wired by the manufacturer; PROM (Programmable ROM), manufactured blank for one-time user programming; EPROM, which uses ultraviolet light for erasure; and EEPROM, allowing selective erasure via electric signals. A comparison table summarizes the differences in erasing methods and constraints across all four types.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a slide titled 'Basics of ROM (Read-Only Memory)' defining ROM as a non-volatile primary memory that retains data when power is off. The instructor explains the 'Read-Only' nature, noting data is permanently written during manufacturing, and describes ROM's function in storing the BIOS for booting. A four-quadrant diagram visually summarizes key properties, including a speed comparison showing ROM is slower than RAM but faster than a hard disk. The instructor then uses red annotations to highlight Cache Memory, Main Memory, and Secondary Memory in the memory hierarchy, drawing an arrow labeled 'ROM' pointing toward the CPU/Cache area to indicate its system role.

  2. 2:00 – 5:00 02:00-05:00

    The lesson transitions to 'Types of ROM & Their Usage,' beginning with MROM (Masked ROM), described as hard-wired by the manufacturer and permanent, with examples like washing machines and old video game cartridges. PROM (Programmable ROM) is introduced next, manufactured blank but programmable only once by the user; a red circle highlights the constraint that a mistake means a wasted chip. The instructor then covers EPROM (Erasable PROM), which can be erased using ultraviolet light, and EEPROM (Electrically Erasable PROM), allowing selective erasure via electric signals. A two-panel diagram contrasts EPROM's UV light erase mechanism with EEPROM's electric signal approach, emphasizing that EPROM requires erasing the entire chip.

  3. 5:00 – 6:26 05:00-06:26

    The final segment consolidates the four ROM types through a comparison table with columns for MROM, PROM, EPROM, and EEPROM. Rows detail the Erasing Method, showing 'UV Light' for EPROM and 'Electric Signal' for EEPROM, with red check and X marks indicating capabilities. The instructor revisits the MROM and PROM slide, pointing to illustrations of a mask, washing machine, game cartridge, and a trash can labeled 'wasted chip' to reinforce the one-time programming constraint. The EPROM vs. EEPROM diagram reappears, with red-underlined phrases like 'entire chip' emphasizing that EPROM erasure is not selective, unlike EEPROM's targeted electric signal approach.

The lecture builds a clear progression from ROM fundamentals to specific type comparisons. It starts with core definitions—non-volatility, read-only nature, and BIOS function—then places ROM within the memory hierarchy relative to CPU, cache, main memory, and secondary storage. The teaching flow moves logically through four ROM types in order of increasing programmability: MROM (fixed), PROM (one-time user programming), EPROM (UV-erasable, whole-chip), and EEPROM (electrically erasable, selective). Key pedagogical tools include red annotations for emphasis, visual diagrams contrasting erasure mechanisms, real-world examples (washing machines, game cartridges), and a final comparison table that consolidates erasing methods and constraints. The central takeaway is the trade-off between permanence, programmability, and erasure flexibility across ROM types.

Loading lesson…