Code Wrangling at its Best
Before we add paging, a heap, processes, filesystems, or user programs, the kernel must answer a basic question: Which physical 4 KiB pages of RAM are safe for me to use? Right now, our kernel can boot, print text, catch CPU exceptions, and receive timer/keyboard interrupts. But it still cannot safely allocate memory. This chapter
Continue Reading “Chapter 4 — Reading the Memory Map and Building a Physical Page Allocator”
Today, we are beginning a new article series: “Writing a Linux-Style Operating System From Scratch.” In this series, we will walk step by step through the process of creating our own operating system from the ground up. Many operating system tutorials stop shortly after the system boots and prints a simple message on the screen.
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Introduction As an electronics enthusiast with over 50 years of experience, I’ve had the privilege of witnessing the dramatic evolution of computing systems. From the early days of 4 and 8-bit machines with minimal RAM to today’s powerful 64-bit computers with terabytes of storage, the progress has been nothing short of extraordinary. The same transformative
Continue Reading “Developing an Open Hardware Device Programmer”
Unicode is a universal encoding standard designed to support every language and symbol in use today. This article provides an in-depth look into how Unicode works in application development, exploring the challenges of string comparison, normalization, and the multiple ways that the same visual character can be represented. Learn how to handle Unicode strings in Python, JavaScript, and C, and discover how normalization can resolve issues when comparing visually identical characters.
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Embark on an exciting journey into the world of text adventure game development with this comprehensive guide to creating your own game in BASIC. Explore the intricacies of game design, programming techniques, and interactive storytelling as you learn to craft immersive experiences for players.
Continue Reading “Going Nostalgic With Text Adventures And QB64!”
Explore the unique world of retro game development on classic systems and small SBCs. Learn about the challenges
Tooling for the Tiny-T When we completed the console, last installment, I had said I was unsure what I would cover next. I’m really wanting to begin implementing our audio device, but I felt that adding a GUI for the Tiny-T system was a target much more achievable in the limited time I had. However,
Adding a Crude Console Last time, we left off with a working computer system using the Tiny-T processor. I told you that we would add a very crude terminal to the system this time. The terminal I’ll present today is barely a terminal. It won’t have any special functions, text scrolling, or any other features
Today’s Project NOTICE: Today’s Code will only work under Python 3.10 and later. In this episode, we will build a new system using a processor with Von Neumann Architecture. We will also be splitting our system into various files and classes to organize our system better. The Memory will no longer be part of the
Last issue we built a simple assembler for our TIny-P processor emulator. In this installment, we will build a loader. But what is a loader? Loaders are small programs that load other programs into system memory and prepare them for execution. Most loaders are part of an Operating System however, in the embedded world, there
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