Arithmetic and Logic Unit
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This document discusses the Arithmetic Logic Unit (ALU) and numbering systems used in computers. It explains that the ALU performs calculations and logical operations in a computer. The ALU uses binary numbers and basic logic gates to handle integers and sometimes floating point numbers. It receives inputs and produces outputs. The document also describes different numbering systems used in computing, including binary, octal, decimal, and hexadecimal. It explains how each system works from the perspective of a base counting system.
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Dokumen ini membahas tentang analisis dan desain sistem untuk sistem ATM. Terdapat penjelasan mengenai diagram urutan dan diagram kelas yang menggambarkan interaksi antar objek dalam sistem ATM untuk beberapa kasus penggunaan seperti mengecek saldo, mentransfer uang, dan mengambil uang. Dokumen ini juga menampilkan contoh desain antarmuka pengguna untuk sistem ATM menggunakan perangkat lunak Netbeans.
Activity Diagram
Dokumen ini membahas tentang pemodelan proses bisnis dengan diagram aktivitas dan menggunakan sistem ATM sebagai contoh studi kasus. Diagram aktivitas digunakan untuk memvisualisasikan aliran kerja dalam suatu proses bisnis yang melibatkan beberapa departemen. Contoh aktivitas yang dimodelkan meliputi memasukkan PIN, mengecek saldo, mentransfer uang, mengambil uang, dan logout.
Use Case Diagram
The document discusses use case diagrams for systems analysis and design. It provides examples of use case diagrams for an appointment system and an ATM system. Key elements of use case diagrams are described, including actors, use cases, relationships like generalization, include and extend, and the system boundary. The ATM system example demonstrates how a use case diagram can model the interactions between an actor (user) and the various functions of an ATM machine like checking balance, transferring money, withdrawing money and logging out.
Requirement Gathering
Systems analysis and design techniques are discussed, including requirement gathering and business process analysis. Requirement gathering involves document analysis, interviews, questionnaires, and observation to understand user needs. Functional requirements define system functions while non-functional requirements address system qualities. Business process analysis assesses current processes and can involve automation, improvement, or reengineering. Barriers to effective requirement gathering include users finding additional needs after seeing a system ("yes but" syndrome), incomplete discovery of all needs ("undiscovered ruins" syndrome), and communication gaps between users and developers.
Business Value
The document discusses a feasibility analysis for a proposed CD Selections Internet Order System project.
The technical feasibility is determined to be medium risk overall, as the application and technology are somewhat unfamiliar but compatible with existing systems. The economic feasibility analysis shows a 229% return on investment over 3 years with a break-even point of 1.7 years. The organizational feasibility is low risk as the project aligns with goals of increasing sales and becoming more Internet-savvy.
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Arithmetic and Logic Unit
- 1. Organisasi dan Arsitektur Komputer Ajeng Savitri Puspaningrum, M.Kom Pertemuan 10
- 2. Arithmetic and Logic Unit
- 3. Learning about ALU Learning computer arithmetic
- 4. Arithmetic & Logic Unit Does the calculations Everything else in the computer is there to service this unit Using a simple digital logic device that can store binary and boolean operations. Handles integers May handle floating point (real) numbers
- 5. ALU Inputs and Outputs
- 6. Kind of Computer Arithmetic Computer Arithmetic Binary Decimal Integer Floating Point
- 7. Numbering System Binary : 0 and 1 Octal : 0, 1, 2, 3, 4, 5, 6, 7 Decimal : 0 - 9 Hexadecimal : 1, 2, 3, . . ., 9, A, B, C, D, E and F
- 8. The Binary Numbering System The most fundamental numbering system in all digital and computer based systems and binary numbers follow the same set of rules as the decimal numbering system. Digital logic and computer systems use just two values or states to represent a condition, a logic level “1” or a logic level “0”, and each “0” and “1” is considered to be a single digit in a Base-of-2 (bi) or “binary numbering system”.
- 9. The Octal Numbering System Octal numbers therefore have a range of just “8” digits, (0, 1, 2, 3, 4, 5, 6, 7)
- 10. The Hexadecimal Numbering System Decimal Hexadecimal 0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 A 11 B 12 C 13 D 14 E 15 F Uses the Base of 16 system and are a popular choice for representing long binary values because their format is quite compact and much easier to understand compared to the long binary strings of 1’s and 0’s
- 11. Refference Stalling, William, Computer Organization and Architecture, 10th Edition, Pearson, 2015 Abdurohman, Maman, Organisasi dan Arsitektur Komputer revisi ke-4, Penerbit Informatika, 2017