bttnTB

tangTest/selector.v

@@ -0,0 +1,20 @@
+module selector (
+    input [3:0] A,
+    input [3:0] B,
+    input [2:0] opCodeA,
+    input [1:0] select,
+    input [11:0] ALUY,
+    output reg [11:0] Y
+);
+
+always @(*) begin
+    case (select)
+        2'b00: Y = {8'b00000000, A};          // Zero-extend A to 8 bits
+        2'b01: Y = {8'b00000000, B};          // Zero-extend B to 8 bits
+        2'b10: Y = {9'b000000000, opCodeA};   // Zero-extend opCodeA to 8 bits
+        2'b11: Y = ALUY;                  // Directly assign ALUY
+        default: Y = ALUY;         // Default case for safety
+    endcase
+end
+
+endmodule