A.5.194 OUT: Output Data to I/O Port
OUT imm8,AL ; E6 ib [8086]
OUT imm8,AX ; o16 E7 ib [8086]
OUT imm8,EAX ; o32 E7 ib [386]
OUT DX,AL ; EE [8086]
OUT DX,AX ; o16 EF [8086]
OUT DX,EAX ; o32 EF [386]
OUT writes the contents of the given source register to the specified
I/O port. The port number may be specified as an immediate value if it
is between 0 and 255, and otherwise must be stored in DX. See also IN
(section A.5.119).