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LIBRARYIEEEUSEIEEESTD_LOGIC_1164ALLUSEIEEESTD_LOGIC_ARITHALLUSEIEEESTD_LOGIC_UNSIGNEDALLENTITYdecoder2_4IS
PORTaINSTD_LOGIC_VECTOR1DOWNTO0sOUTSTD_LOGIC_VECTOR3DOWNTO0
ENDdecoder2_4ARCHITECTUREBehavioralOFdecoder2_4_tISBEGIN
PROCESSselBEGINCASEaISWHEN