Five days, four milestones. Since the last update, Rainbow OS has gained a full-screen text editor, a BASIC interpreter, persistent disk storage, and a subset-C compiler that generates native i386 machine code — all running on a custom 32-bit kernel targeting the Intel 486. M10: Vim-like Text Editor Rainbow OS now ships with a built-in […]

What if you built a complete operating system from scratch — no libraries, no existing kernel, no abstraction layers? That’s exactly what Rainbow-OS is: a self-built 32-bit operating system for the Intel 486 architecture, emulated with QEMU. What is Rainbow-OS? Rainbow-OS is a hobby project that demonstrates how a modern operating system works at the

When reverse-engineering a legacy BIOS — in my case a 1994 Compaq Deskpro EISA BIOS — you eventually reach the limits of what static analysis in Ghidra can tell you. You need to see what the hardware actually does at runtime: what values the chipset registers hold, how CMOS is configured, what the EISA slot

Phase 1: Grundlagen 1. Woche:– Tag 1: Einführung in Assembler: Lerne die Grundlagen von Assembler, den Aufbau von Assembler-Anweisungen und die Syntax.– Tag 2: CPU-Architektur: Lerne die Grundlagen der CPU-Architektur, wie Register, Speicher und Befehlszyklus.– Tag 3: Einfache Assembler-Anweisungen: Lerne die Verwendung von einfachen Assembler-Anweisungen wie MOV, ADD, SUB, JMP usw.– Tag 4: Arithmetische Operationen: