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main:
 ; lea rax, [buffer]

 lea eax, [402000]

 ; mov@ [port_base], rax

 mov [402030], eax

 ; mov@ [port_index], 1

 mov dword ptr [402034], 1

 ; mov@ r8, [port_base]

 mov ebx, [402030]
 mov [402010], ebx

 ; mov@ r9d, [port_index]

 mov ebx, [402034]
 mov [402014], ebx

 ; mov@ r11w, 2

 mov bx, 2          ; unnecessary, don't care
 mov [40201C], bx

 ; add@ [r8+r9*2], r11w

 mov ebx, [402010]
 mov ecx, [402014]
 lea ebx, [ebx+ecx*2]
 mov cx, [40201C]
 add [ebx], cx

 ; mov@ r12w, 22h

 mov bx, 22         ; unnecessary, don't care
 mov [402020], bx

 ; cmp@ r12w, [r8+r9*2]

 mov ebx, [402010]
 mov ecx, [402014]
 mov bx, [ebx+ecx*2]
 mov cx, [402020]      ; unnecessary, don't care
 cmp cx, bx

 jnz main
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