MOS6520 looking mostly there.

core/tests/at28c256.rs

@@ -1,6 +0,0 @@
-use super::*;
-
-#[test]
-fn test123() {
-
-}

core/tests/base.rs

@@ -0,0 +1,4 @@
+#[test]
+fn test() {
+    assert!(true);
+}

core/tests/execution_tests.rs

@@ -1 +0,0 @@
-

core/tests/instruction_encode_decode.rs

@@ -1 +0,0 @@
-