Smallest "Hello World" Challenge

Program:
1.cannot: use assembler and non-portable OS APIs
2.outputs "Hello World" in visible form.
3.must be compiled into a single program unit which can be transferred between any two machines(with same OS) and run "Hello World".


 xchg ax, bp
 mov dx, 107h
 int 21h
 ret
 db "Hello world$"

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