x86

x86 (also known as 8086) is a family of complex instruction set computer (CISC) instruction set architectures created by Intel. The x86 assembly language produces object code for the x86 class of processors.

While the original 8086 was 16-bit, x86 now refers most commonly to 32-bit based systems. It was later extended to 64-bit architectures by AMD as amd64, but is most commonly referred to as x86₆₄.

BITS 64

%define SYS_exit 60
%define SYS_write 1
%define STDOUT 1

segment .text
global _start
_start:
    mov rax, SYS_write
    mov rdi, STDOUT
    mov rsi, buf
    mov rdx, buf_sz
    syscall

    mov rax, SYS_exit
    mov rdi, 0
    syscall

segment .data
buf: db "Hello World", 10
buf_sz: equ $-buf