ARM Processor Architecture & Embedded Systems
Current Program Status Register (CPSR)
The Current Program Status Register (CPSR) is a 32-bit special-purpose register in ARM processors. It plays a central role in controlling the state and execution flow of the processor.
CPSR Structure
The CPSR has four 8-bit fields: Flags (holds condition flags), Status and Extension (reserved), and Control. In current ARM designs, only the Control and Flags fields are actively used.
Key CPSR Bits
- N (Bit 31) – Negative flag
- Z (Bit 30) – Zero flag
- C (Bit 29) –
Database Essentials: Key Terms and Principles
Database Fundamentals: Key Concepts & Definitions
Data Dictionary Explained
A data dictionary is a centralized repository containing definitions, descriptions, and attributes of data elements within a database. This includes details like table names, column types, and constraints, ensuring data consistency and understanding.
Database Schema Definition
A schema is the logical structure or blueprint of a database. It defines how data is organized, including tables, fields, relationships, and constraints,
Read MoreJava Multithreading Essentials: Concurrency and Thread Management
Java Multithreading: Concurrency Fundamentals
- Multithreading is a process to execute multiple threads simultaneously, without dependency on other threads.
- Java supports multithreaded programming, allowing you to write programs that perform many tasks concurrently.
- A multithreaded program contains two or more parts that can run at the same time. Each part of such a program is called a thread.
- The
Threadclass is predefined and available in thejava.langpackage. A thread is a basic unit of CPU execution,
Python Code Snippets: Games, Strings, and Math Utilities
Python Code Snippets: Practical Utilities and Games
This collection features various Python code snippets, ranging from an interactive guessing game to essential string and mathematical utility functions. Each section provides a clear, functional example of common programming tasks.
Interactive Fibonacci Guessing Game in Python
Challenge your knowledge of Fibonacci numbers with this interactive guessing game. The program generates Fibonacci numbers and asks you to determine if they are even or odd.
Read MoreJavaScript Core Concepts & Advanced Techniques
JavaScript Fundamentals: Web Storage & Event Handling
This section covers essential client-side data storage mechanisms and advanced event management techniques in JavaScript.
1. Web Storage (Local Storage & Session Storage)
Web Storage allows web applications to store data locally within the user’s browser. Unlike cookies, Web Storage offers a larger storage capacity (typically 5MB or more) and the data is not sent to the server with every HTTP request.
A. Local Storage – Permanent Data Storage
Data
Read MoreComputer Graphics Core Concepts: Display, Rendering, Algorithms
Display Technologies: Beam Penetration vs. Shadow Mask
| Beam Penetration | Shadow Mask |
|---|---|
| Used in older color CRTs. | Used in modern color CRTs/LCDs. |
| Two layers of phosphor (red & green); beam depth controls color. | Three separate phosphors (R, G, B) and a mask to direct beams. |
| Limited color range (4–7 colors). | Millions of colors possible. |
| Cheaper. | Higher cost. |
| Lower image quality. | High image quality. |
Graphics Rendering: Raster Scan vs. Vector Scan
| Raster Scan | Vector Scan |
|---|---|
| Displays image as a matrix of pixels. | Draws |