Many Changes

I added a comparator, I updated the control unit so that it now uses the 4 bit ALU opcode instead of the 3 bit from before. I added testbenches to the control unit and the slt and comparator modules. However, like before I unable to run the simulation on my desktop. Finally, i added the program code for the equation solver as a test bench in the CPU9bit module

lab2CA.srcs/sources_1/new/ALU.v

@@ -53,6 +53,10 @@ module ALU(
         .A(operand0),
         .B(result_I));
     // J (1001)
+    slt slt0(
+        .inA(operand0),
+        .inB(operand1),
+        .outA(result));
     // K (1010)
     // L (1011)
     // M (1100)