❔ How to Build an Operating System

✨ What you need to get started

• 📝 Text editor
• 💻 Virtual machine
• 💿 Rufus - Recommended rufus-2.18
• 🔧 Binary compiler - Nasm
• 💾 Data image file - Fergoraw
• 📀 Tools for mounting ISO images

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BOOT START

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💾 Basic Boot

[ORG 0x7C00]

LOOP:
  jmp LOOP

times 510-($-$$) db 0
db 0x55
db 0xAA

❔ How to Build

To build, you will need the nasm program, go to the directory where the boot file is located and give the following command:

$ nasm boot.asm -f bin -o boot.bin

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🔖 Define directives

Allocating Storage Space for Initialized Data

Directive	Purpose	Storage Space
DB	Define Byte	Allocates 1 byte
DW	Define Word	Allocates 2 bytes

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🌎 Hello World!

Tabela ansi com os caracteres em Decimal e Hexadecial passados para escrever um Hello World! na tela

Decimal	Hexadecimal	Caractere		Decimal	Hexadecimal	Caractere
72	48	H		87	57	W
101	65	e		111	6F	o
108	6C	l		114	72	r
108	6C	l		108	6C	l
111	6F	o		100	64	d
32	20			33	21	!

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🌎 Welcome!