fpga

spartanTest/halfsubtraction.v

@@ -0,0 +1,12 @@
+module halfsubtraction (
+    input A, B,
+    output Difference, Borrow
+);
+
+wire notA;
+
+xor xo1 (Difference, A, B);
+not a1 (notA, A);
+and an1 (Borrow, notA, B);
+
+endmodule