diff --git a/CMakeLists.txt b/CMakeLists.txt
index d48c4a8..275edb9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,8 @@ add_custom_target(
 
 add_library(${lib_name}
         libplip/Plip.cpp
+        libplip/PlipInput.cpp
+        libplip/PlipInputDefinition.cpp
 )
 
 add_dependencies(${lib_name} GENERATE_LIB_VERSION_HEADER)
diff --git a/libplip/PlipInput.cpp b/libplip/PlipInput.cpp
new file mode 100644
index 0000000..ee73fed
--- /dev/null
+++ b/libplip/PlipInput.cpp
@@ -0,0 +1,20 @@
+/* PlipInput.cpp
+ *
+ * Provides an interface between the emulation core and the frontend.
+ */
+
+#include "PlipInput.h"
+
+namespace Plip {
+    void PlipInput::AddInput(int id, const PlipInputDefinition& input) {
+        m_coreInput.insert(std::pair<int, PlipInputDefinition>(id, input));
+    }
+
+    void PlipInput::AddInput(std::map<int, PlipInputDefinition> inputList) {
+        m_coreInput.insert(inputList.begin(), inputList.end());
+    }
+
+    void PlipInput::ClearInput() {
+        m_coreInput.clear();
+    }
+}
diff --git a/libplip/PlipInput.h b/libplip/PlipInput.h
new file mode 100644
index 0000000..a951aa0
--- /dev/null
+++ b/libplip/PlipInput.h
@@ -0,0 +1,26 @@
+/* PlipInput.h
+ *
+ * Provides an interface between the emulation core and the frontend.
+ */
+
+#pragma once
+
+#include <map>
+#include <string>
+
+#include "PlipInputDefinition.h"
+
+namespace Plip {
+    class PlipInput {
+    public:
+        void AddInput(int id, const PlipInputDefinition &input);
+        void AddInput(std::map<int, PlipInputDefinition> inputList);
+        void ClearInput();
+
+    protected:
+        PlipInput() = default;
+
+    private:
+        std::map<int, PlipInputDefinition> m_coreInput;
+    };
+}
diff --git a/libplip/PlipInputDefinition.cpp b/libplip/PlipInputDefinition.cpp
new file mode 100644
index 0000000..686d7ca
--- /dev/null
+++ b/libplip/PlipInputDefinition.cpp
@@ -0,0 +1,21 @@
+/* PlipInputDefinition.cpp
+ *
+ * Allows the core to define an input for the frontend to handle.
+ */
+
+#include "PlipInputDefinition.h"
+
+namespace Plip {
+    PlipInputDefinition::PlipInputDefinition(PlipInputType type, const std::string &description) {
+        m_type = type;
+        m_description = description;
+    }
+
+    std::string PlipInputDefinition::GetDescription() const {
+        return m_description;
+    }
+
+    PlipInputType PlipInputDefinition::GetType() const {
+        return m_type;
+    }
+}
diff --git a/libplip/PlipInputDefinition.h b/libplip/PlipInputDefinition.h
new file mode 100644
index 0000000..4af879b
--- /dev/null
+++ b/libplip/PlipInputDefinition.h
@@ -0,0 +1,32 @@
+/* PlipInputDefinition.h
+ *
+ * Allows the core to define an input for the frontend to handle.
+ */
+
+#pragma once
+
+#include <string>
+
+namespace Plip {
+    union PlipInputData {
+        bool digital = false;
+    };
+
+    enum class PlipInputType {
+        Digital
+    };
+
+    class PlipInputDefinition {
+    public:
+        PlipInputDefinition(PlipInputType type, const std::string &description);
+
+        std::string GetDescription() const;
+        PlipInputType GetType() const;
+
+        PlipInputData data;
+
+    private:
+        PlipInputType m_type;
+        std::string m_description;
+    };
+}
diff --git a/libplip/PlipVersion.h b/libplip/PlipVersion.h
index 183e8f7..3e71a39 100644
--- a/libplip/PlipVersion.h
+++ b/libplip/PlipVersion.h
@@ -5,5 +5,5 @@
 
 #define GIT_FOUND
 #define GIT_BRANCH "master"
-#define GIT_REVISION "a6b8d9f"
+#define GIT_REVISION "e43f14f"
 /* #undef GIT_TAG */
diff --git a/libplip/PlipVideo.h b/libplip/PlipVideo.h
index b4cc122..14f6328 100644
--- a/libplip/PlipVideo.h
+++ b/libplip/PlipVideo.h
@@ -31,6 +31,5 @@ namespace Plip {
 
     protected:
         PlipVideo() = default;
-        ~PlipVideo() = default;
     };
 }