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Recap: Write Setup

Part of the Fundamentals section of Coddy's Assembly journey — lesson 42 of 45.

Challenge

Write a complete program that prints:

<code>Start

<code>Middle

End

Each word on its own line. Use three separate strings and three write syscalls.

The exit syscall must be included.

Try it yourself

section .data
    ; TODO: Define three strings with newlines
    ; TODO: Define their lengths

section .text
    global _start

_start:
    ; TODO: Print the lines listed in the instructions, one per TODO, in order
    ; TODO: Print the lines listed in the instructions, one per TODO, in order
    ; TODO: Print the exact text from the instructions

    ; TODO: Exit cleanly

All lessons in Fundamentals

1The Machine

What is CPU Memory Registers vs Memory How instructions work Two-File Pattern The x86-64 Architecture

4Data Definition

The .data Section db - Define Byte dw - Define Word dd - Define Double Word dq - Define Quad Word Strings with db The $ Symbol Recap: Build data.asm

7Hello World

Planning the Program Writing data.asm

Project lesson

Writing main.asm

Project lesson

2Number Systems

Why Binary?Binary Numbers Decimal to Binary Why Hexadecimal?Hex to Decimal Decimal to Hex ASCII & Hex

5Exit Syscall

What is Syscall?Exit Syscall (60)Exit Codes Recap: Clean Exit

3First instruction - MOV

What is MOV?MOV Immediate MOV Register to Register MOV Memory to Register MOV Register to Memory LEA - Load Address MOV with Different Sizes Practice: Swap Registers Recap: MOV Challenge

6Write Syscall

Write Syscall (1)File Descriptor (rdi)Buffer Address (rsi)Byte Count (rdx)Putting It Together Printing Two Strings Newline MattersRecap: Write Setup