Hello World for legacy BIOS

hello.asm

; build with: nasm hello.asm
org 7c00h
mov ah, 3h
mov bh, 0
int 10h
mov ax, cs
mov es, ax
mov cx, hello#
mov bh, 0
mov dh, 0
mov dl, 0
mov bp, hello
mov bl, 07h
mov al, 1
mov ah, 13h
int 10h
loop:
jmp loop
hello:
db 'Hello, World!'
db 0h
hello#: equ $-hello