Memory References

Duration: 5 min

This video lesson is available to enrolled students.

Return to /learn/TPSC-ASSISTANT-TECHNICAL-OFFICER/computer-organization-and-architecture/control-unit-design/instruction-types/asset-memory-references after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. Paper 2 | Digital Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Floating Point Rep
  3. Paper 2 | Computer Organization And Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Control Unit Design, Instr Formats & Modes, Programming the Basic Computer
  4. Paper 2 | Analog And Digital Communication: Introduction to Communication Systems & Random Signals, Analog Communication Systems, Information Theory & Digital Communication Fundamentals, Digital Modulation & Detection Techniques, Error Control, Synchronization & Multiple Access Techniques
  5. Paper 2 | Programming in C: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  6. Paper 2 | Data Structures And Programming: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Java, OOPS with C++, Java Fundamentals, Array, String, IO & References
  7. Paper 2 | Algorithms: Algorithm Analysis, Sorting Algorithms, Time Complexity Analysis, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos
  8. 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
  9. Paper 2 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Unix OS, Linux OS
  10. Paper 2 | Databases: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Relational Calculus, File Organization & Indexing, Transaction Management, Concurrency Control
  11. Paper 2 | Information Systems and Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  12. Paper 2 | Computer Networks: Introduction to CN, Data Communication, 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, Application Layer, Hardware Basics
  13. Paper 2 | Internet & Web Technologies: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, HTML Basics, JavaScript-Basics, CSS, XML, HTML5
  14. Paper 2 | Cyber Security And Emerging Technologies: Emerging Tech Trends
  15. Paper 2 | Cloud Technology: Cloud Computing
  16. Paper 2 | Probability and statistics: Probability, Statistics
  17. Paper-1 English: Vocabulary, Preposition, Articles, Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Cloze Test (Cloze Passage), Sentence Construction
  18. Paper 1 General Mental Ability & Logical reasoning: Ratio and Proportion (Ratios), Divisibility Rules, Data Interpretation, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Percentage, Average, Powers and Exponents (Surds and Indices), Algebra, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Pipe and Cistern, Mensuration and Geometry, Mental Ability, Age Problems, Partnership, Arithmetic, Speed Mathematics and Basic Mathematics, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Selection Decision Table (Decision Making), Logical Sequence Of Words, Venn Diagram, Analogy
  19. Paper-1 General Knowledge & Current Affairs: State Wise GK, History, Geography, GK- Current Affairs, Static General Knowledge
  20. Full Length Mock Test:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture segment provides a comprehensive analysis of a computer's control unit, specifically focusing on the instruction cycle and the execution of memory-reference instructions. The instructor utilizes flowcharts and tables to explain how the control unit decodes instructions, handles indirect addressing, and performs specific micro-operations. The lesson progresses from the general logic of instruction fetching and decoding to the detailed execution steps for a set of standard assembly language instructions.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor begins by dissecting a control unit flowchart. He explains the initialization step where the sequence counter SC is set to 0. The process moves to loading the address register AR with the program counter PC and fetching the instruction into the instruction register IR. He highlights the decoding of the operation code in bits 12 through 14 of the IR. A key decision point involves the signal D3, which identifies memory-reference instructions. The instructor explains the role of the I bit (bit 15) in determining indirect addressing. If I is 1, the effective address is retrieved from memory using the micro-operation AR <- M[AR]. If I is 0, the address is already in AR, and the instruction proceeds directly to execution.

  2. 2:00 – 4:59 02:00-04:59

    The lecture transitions to a detailed table of Memory-Reference Instructions, listing symbols like AND, ADD, LDA, STA, BUN, BSA, and ISZ. The instructor explains the symbolic descriptions, such as AC <- AC ^ M[AR] for the AND instruction. He then presents detailed flowcharts for each of these instructions, breaking down the micro-operations. For example, the AND instruction involves fetching data into the data register DR (DR <- M[AR]) and then performing the logical AND with the accumulator AC. Similarly, the ADD instruction involves DR <- M[AR] followed by AC <- AC + DR. The BSA instruction is shown to store the return address in memory (M[AR] <- PC) and update the program counter (PC <- AR). The ISZ instruction increments the memory word and skips if the result is zero. The segment concludes with a brief overview of hexadecimal codes for other instructions like CLA and CLE.

The video effectively bridges the gap between abstract control logic and concrete instruction execution. By first establishing the general flowchart for instruction decoding and indirect addressing, the instructor sets the stage for understanding the specific micro-operations required for each instruction type. The detailed breakdown of memory-reference instructions demonstrates how the control unit orchestrates data movement between registers like AC, AR, PC, and DR to perform arithmetic, logic, and control flow tasks. This progression from general decoding to specific execution highlights the hierarchical nature of computer architecture design.

Loading lesson…