To_Stdlogicvector(B"10001100000000100000000000000001")); -- lw $2,1($0)
          constant mem1 : std_logic_vector(31 downto 0) := (
To_Stdlogicvector(B"00000000111000110001100000100010")); -- sub $3, $7, $3
          constant mem2 : std_logic_vector(31 downto 0) := (
To_Stdlogicvector(B"00000000100001010010000000100100")); -- and  $4, $4, $5
          constant mem3 : std_logic_vector(31 downto 0) := (
To_Stdlogicvector(B"00000000110001110010100000100101")); -- or $5, $6, $7
          constant mem4 : std_logic_vector(31 downto 0) := (
To_Stdlogicvector(B"00000000010000010011000000100000")); -- add $6, $2, $1
          constant mem5 : std_logic_vector(31 downto 0) := (
To_Stdlogicvector(B"00010000001000011111111111111010")); -- beq $1,$1,init
          constant mem6 : std_logic_vector(31 downto 0) := (
To_Stdlogicvector(B"00000000000000000000000000000000")); -- nop
          constant mem7 : std_logic_vector(31 downto 0) := (
To_Stdlogicvector(B"00000000000000000000000000000000")); -- nop