LC

Write a Minimal Boot Sector that Prints Message

hard1/8

PrevRead Additional Sectors from Disk in Boot Sector

Language

Compiler

2.0s Limit 256MB

Implementation

Create a minimal boot sector in assembly that displays text.

Requirements:

Write x86 assembly boot sector code
Use NASM syntax (compatible with various assemblers)
Display a multi-line message using BIOS interrupts
Include proper boot signature (0x55AA)
Set up stack pointer
Use BIOS INT 0x10 for text output
Include comments explaining each section
Pad to exactly 512 bytes
Provide build instructions
Demonstrate understanding of real mode

Why This Matters

This exact 512-byte, [ORG 0x7C00], 0x55AA-signed structure is what every real MBR bootloader looks like, from the earliest DOS boot sectors to GRUB's own stage-1 code today. The xv6 teaching OS and countless OSDev-wiki 'first bootloader' tutorials start from this identical skeleton, because every x86 BIOS on the planet still loads and jumps to it the same way.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0