diff --git a/rtl/mips_cpu_bus.v b/rtl/mips_cpu_bus.v
index 111a7b3..f43174d 100644
--- a/rtl/mips_cpu_bus.v
+++ b/rtl/mips_cpu_bus.v
@@ -14,3 +14,34 @@ module mips_cpu_bus(
     output logic[3:0] byteenable,
     input logic[31:0] readdata
 );
+
+logic[31:0] instr_reg; // instruction register / single-word cache for current instruction
+logic clk_internal; // modulated clock to be passed to harvard cpu
+
+always_ff @(posedge clk) begin // how/when to pass through negedge?
+    if (waitrequest) begin //if waitrequest is high, do nothing
+    end else begin
+        //update outputs?
+    end
+end
+
+always_comb begin
+
+end
+
+mips_cpu_harvard mips_cpu_harvard( // Harvard CPU within wrapper
+.clk(clk_internal), // modulated clock input to allow waiting for valid data from memory, input
+.reset(reset), // CPU reset, input
+.active(active), // Is CPU active, output
+.register_v0(register_v0), // $2 / $v0 debug bus, output
+.clk_enable(1'b0), // unused clock enable, input
+.instr_address(######), // output
+.instr_readdata(instr_reg), // cached instruction passed into harvard cpu, input
+.data_address(######), // output
+.data_write(######), // output
+.data_read(######), // output
+.data_writedata(######), // output
+.data_readdata(######) // input
+);
+
+endmodule : mips_cpu_bus