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.sim/sim_1/behav/xsim/comparator_tb_vlog.prj

@@ -0,0 +1,9 @@
+# compile verilog/system verilog design source files
+verilog xil_defaultlib  \
+"../../../../lab2CA.srcs/sources_1/new/BasicModules.v" \
+
+# compile glbl module
+verilog xil_defaultlib "glbl.v"
+
+# Do not sort compile order
+nosort