-------------------------------------------------------------------------------
-- Simple processor from EE126, memory segment
-- By: Frank Bruno
-- for Professor Chang
-------------------------------------------------------------------------------
USE work.alu_pkg.ALL;
USE work.bv_arithmetic.ALL;
ENTITY simple_memory IS
PORT(instr : IN bit_vector(7 DOWNTO 0);
pc : IN integer range 0 to 15;
load : IN bit;
clock : IN bit;
current_mem : OUT bit_vector(7 DOWNTO 0)
);
END simple_memory;
ARCHITECTURE behave_simple_mem OF simple_memory IS
SIGNAL memory : bit_8(15 DOWNTO 0);
BEGIN -- behave_simple_mem
PROCESS(pc, load)
BEGIN
-------------------------------------------------------------------------------
-- on a load event, load the memory
-------------------------------------------------------------------------------
IF (load = '1') THEN
memory(pc) <= instr;
END IF;
-------------------------------------------------------------------------------
-- let the program know the current memory pointed to by PC
-------------------------------------------------------------------------------
current_mem <= memory(pc);
END PROCESS;
END behave_simple_mem;
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