ENTITY rom_dec_nop3 IS
PORT (
  vdd    : in  BIT;
  vss    : in  BIT
);
END rom_dec_nop3;

ARCHITECTURE VBE OF rom_dec_nop3 IS

BEGIN
  ASSERT (vdd and not (vss))
  REPORT "power supply is missing on rom_dec_nop3"
  SEVERITY WARNING;
END;