ENTITY ram_mem_buf1 IS
PORT (
  seli     : in  BIT;
  nck      : in  BIT;
  selramx  : in  BIT;
  nseli    : out  BIT;
  vdd  	   : in  BIT;
  vss	   : in  BIT
);
END ram_mem_buf1;

ARCHITECTURE VBE OF ram_mem_buf1 IS

BEGIN
  ASSERT (vdd and not (vss))
  REPORT "power supply is missing on ram_mem_buf1"
  SEVERITY WARNING;

END;