Writing a Bootsector in Assembler under Windows скачать в хорошем качестве

Writing a Bootsector in Assembler under Windows

Ever wondered what really happens when you press a key on your keyboard? In this video, we go all the way down to the hardware level — no operating system, no drivers, just pure assembly! 🧮 We’ll write a simple bootloader in x86 assembler that directly reads your keyboard input through the BIOS interrupt INT 0x16, then displays the scan codes in hexadecimal. You’ll see how pressing keys like CTRL, A, or Enter translates into numeric codes that the CPU actually understands. What you’ll learn: What BIOS interrupt 0x16 does The difference between scan codes and ASCII codes How the AX register (AH + AL) holds keyboard data How to write a 512-byte boot sector that runs on real or emulated hardware How to use NASM and QEMU under Windows to build and run it Tools used: NASM (Netwide Assembler) QEMU for emulation A bit of patience and curiosity Commands shown in the video: nasm -f bin boot.asm -o boot.bin qemu-system-i386 -drive format=raw,file=boot.bin Keywords: assembly bootloader, x86 assembler tutorial, BIOS interrupt 0x16, keyboard scancode explained, NASM tutorial, QEMU tutorial, real mode assembly, operating system basics, how BIOS works, writing bootloader from scratch