Let us start here, from square one. No, from Zero!

games/silentscope/io.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <vector>
+#include "cfg/api.h"
+
+namespace games::silentscope {
+
+    // all buttons in correct order
+    namespace Buttons {
+        enum {
+            SERVICE,
+            TEST,
+            COIN_MECH,
+            START,
+            UP,
+            DOWN,
+            LEFT,
+            RIGHT,
+            GUN_PRESSED,
+            SCOPE_RIGHT,
+            SCOPE_LEFT,
+        };
+    }
+
+    // all analogs in correct order
+    namespace Analogs {
+        enum {
+            GUN_X,
+            GUN_Y,
+        };
+    }
+
+    // getters
+    std::vector<Button> &get_buttons();
+    std::vector<Analog> &get_analogs();
+}