ENTITY rom_dec_line01_64 IS PORT ( nck0 : in BIT; nck1 : in BIT; sel0 : in BIT; sel1 : in BIT; line0 : out BIT; line1 : out BIT; vdd : in BIT; vss : in BIT ); END rom_dec_line01_64; ARCHITECTURE VBE OF rom_dec_line01_64 IS BEGIN ASSERT (vdd and not (vss)) REPORT "power supply is missing on rom_dec_line01_64" SEVERITY WARNING; line0 <= nck0 and sel0; line1 <= nck1 and sel1; END;