diff --git a/Makefile b/Makefile
index 138723a..f73a3e9 100644
--- a/Makefile
+++ b/Makefile
@@ -32,8 +32,8 @@ GFXDIR = $(SRCDIR)/$(GFX)
 NESE_SRC_SRCS = f6502.c f6502_opcodes.c
 NESE_SRC_SRCS += nese.c nes.c cart.c mapper.c
 NESE_SRC_SRCS += ppu.c apu.c
-NESE_SRC_SRCS += memory.c serdes.c save.c rle.c
-NESE_SRC_SRCS += cartinfo.c menu.c
+NESE_SRC_SRCS += memory.c serdes.c save.c rle.c cartinfo.c
+NESE_SRC_SRCS += menu.c list.c state.c menus.c
 NESE_SRC_SRCS += $(OS)/port.c
 NESE_GFX_SRCS = $(notdir $(wildcard $(GFXDIR)/*.c))
 NESE_MAP_SRCS = $(notdir $(wildcard $(MAPDIR)/*.c))
diff --git a/src/linux/port.c b/src/linux/port.c
index ed46a9c..9bbe5b5 100644
--- a/src/linux/port.c
+++ b/src/linux/port.c
@@ -16,7 +16,9 @@
 #include "save.h"
 #include "draw.h"
 #include "cartinfo.h"
-#include "menu.h"
+#include "list.h"
+#include "state.h"
+#include "menus.h"
 
 #define NESE_DEBUG "Port"
 #include "log.h"
@@ -79,71 +81,30 @@ void* nese_alloc(int size) {
 }
 
 
-/*
- * Platform-specific features and controls
- */
-
-#define ACTION_DELAY    (60U * 1U)
-#define ACTION_NOTIFY   (60U * 3U)
+/* Time */
 
-typedef struct {
-    int timer;
-    int msg_id;
-    nese_Action action;
-} Action_State;
-
-static void action_immediate(Action_State* state, nese_Action action) {
-    state->action = action;
-    state->timer = 0;
-}
-
-static void action_start(Action_State* state, nese_Action action,
-                         Overlay* overlay) {
-    if (state->action != Action_OK) {
-        // We can't do two things at once - cancel the current action
-        overlay_clear_message(overlay, state->msg_id);
-        state->action = Action_OK;
+#define NS_PER_S      (1000L * 1000L * 1000L)
+#define FRAME_TIME_NS (16639267L)
 
-    } else {
-        state->action = action;
-
-        const char* op = NULL;
-        if (Action_Load == action) op = "Restoring ...";
-        else if (Action_Save == action) op = "Saving ...";
-        else if (Action_Reset == action) op = "Resetting ...";
-        if (NULL != op) {
-            state->timer = ACTION_DELAY;
-            state->msg_id = overlay_add_message(overlay, op, state->timer);
-        } else {
-            state->timer = 0;
-        }
-    }
+uint64_t time_now(void) {
+  struct timespec ts_now = {0};
+  clock_gettime(CLOCK_REALTIME, &ts_now);
+  return (ts_now.tv_sec * NS_PER_S) + ts_now.tv_nsec;
 }
 
-static nese_Action action_tick(Action_State* state, Overlay* overlay) {
-    nese_Action action = Action_OK;
-
-    if (state->action != Action_OK && --state->timer <= 0) {
-        action = state->action;
-        state->action = Action_OK;
-        overlay_clear_message(overlay, state->msg_id);
-    }
-
-    return action;
+int64_t time_sleep_until(int64_t t_target) {
+  int64_t t_now = time_now();
+  int64_t t_diff = (t_target - t_now) / 1000;
+  if (t_diff > 0) {
+    usleep(t_diff);
+  }
+  return t_diff * 1000;
 }
 
-static int action_notify(nese_Action action, int status, Overlay* overlay) {
-    int msg_id = 0;
-    const char* op = NULL;
-    if (Action_Load == action) op = (status < 0 ? "Restore failed" : "Restored");
-    else if (Action_Save == action) op = (status < 0 ? "Save failed" : "Saved");
-    else if (Action_Reset == action) op = "Reset";
-    if (NULL != op) {
-        msg_id = overlay_add_message(overlay, op, ACTION_NOTIFY);
-    }
-    return msg_id;
-}
 
+/*
+ * Platform-specific features and controls
+ */
 
 #define PLAT_FILENAME_SIZE  (1024U)
 
@@ -164,62 +125,6 @@ typedef struct {
 } platform_data;
 
 
-/* Directories */
-
-static int cmp_files(const void* _a, const void* _b) {
-    const char* a = *(const char**)_a;
-    const char* b = *(const char**)_b;
-
-    int diff = 0;
-    for (char ca = 1, cb = 1; ca && cb && 0 == diff; ++a, ++b) {
-        // Cut extensions; replace underscore with space
-        ca = (*a == '_' ? ' ' : (*a == '.' ? '\0' : *a));
-        cb = (*b == '_' ? ' ' : (*b == '.' ? '\0' : *b));
-        diff = (ca - cb);
-    }
-
-    return diff;
-}
-
-static int count_files(DIR* dir) {
-    int count = 0;
-    struct dirent* de = NULL;
-    while (NULL != (de = readdir(dir))) {
-        if ('.' != de->d_name[0]) ++count;
-    }
-    rewinddir(dir);
-    return count;
-}
-
-static void make_file_list(DIR* dir, File_List* files) {
-    files->count = count_files(dir);
-    files->files = calloc(files->count, sizeof(char*));
-    struct dirent* de = NULL;
-    int i_file = 0;
-    while (NULL != (de = readdir(dir))) {
-        if ('.' != de->d_name[0]) {
-            files->files[i_file] = strdup(de->d_name);
-            ++i_file;
-        }
-    }
-    qsort(files->files, files->count, sizeof(char*), cmp_files);
-}
-
-static void free_file_list(File_List* files) {
-    for (int i = 0; i < files->count; ++i) {
-        free(files->files[i]);
-    }
-    free(files->files);
-}
-
-static int find_file(File_List* files, const char* filename) {
-    int i = (files->count - 1);
-    for ( ; i >= 0 &&
-            (0 != strcmp(files->files[i], filename)); --i);
-    return i;
-}
-
-
 /* Input */
 
 static const int sdl_action_keycodes[Action_Max] = {
@@ -307,6 +212,14 @@ static nese_Action process_events(nes* sys) {
     return action;
 }
 
+nese_Action nese_update_input(void* plat_data, nes_Input* input) {
+    time_sleep_until(time_now() + (NS_PER_S / 60));
+    platform_data* plat = (platform_data*)plat_data;
+    nese_Action action = process_events(plat->sys);
+    if (NULL != input) *input = plat->sys->core.memory.input;
+    return action;
+}
+
 
 /*
  * Time / Video - Should be maximally reusable across platforms
@@ -334,24 +247,6 @@ int nese_line_ready(void* plat_data, uint8_t* buffer, int line) {
 }
 
 
-#define NS_PER_S      (1000L * 1000L * 1000L)
-#define FRAME_TIME_NS (16639267L)
-
-uint64_t time_now(void) {
-  struct timespec ts_now = {0};
-  clock_gettime(CLOCK_REALTIME, &ts_now);
-  return (ts_now.tv_sec * NS_PER_S) + ts_now.tv_nsec;
-}
-
-int64_t time_sleep_until(int64_t t_target) {
-  int64_t t_now = time_now();
-  int64_t t_diff = (t_target - t_now) / 1000;
-  if (t_diff > 0) {
-    usleep(t_diff);
-  }
-  return t_diff * 1000;
-}
-
 static nese_Action game_menu(platform_data* plat);
 
 int nese_frame_ready(void* plat_data) {
@@ -480,7 +375,8 @@ int nese_frame_ready(void* plat_data) {
 
                 char message[32];
                 snprintf(message, sizeof(message), "%.1f fps", fps);
-                overlay_update_message(&plat->overlay, plat->fps_msg_id, message);
+                overlay_update_message(&plat->overlay, plat->fps_msg_id,
+                                       message);
             }
 
             slept_total = 0;
@@ -526,58 +422,6 @@ int nese_get_audio_frequency(void*) {
 
 /* Menus */
 
-nese_Action nese_update_input(void* plat_data, nes_Input* input) {
-    time_sleep_until(time_now() + (NS_PER_S / 60));
-    platform_data* plat = (platform_data*)plat_data;
-    nese_Action action = process_events(plat->sys);
-    if (NULL != input) *input = plat->sys->core.memory.input;
-    return action;
-}
-
-static nese_Action run_rom_menu(platform_data* plat, Menu_State* state,
-                                char* filename, int sz_filename) {
-    nese_Action action = Action_Cancel;
-
-    DIR* dir = opendir("rom");
-
-    if (NULL == dir) {
-        modal_popup(plat, "No ROMS found!\nPress any key to exit",
-                    color_error);
-
-    } else {
-        File_List files = {0};
-        make_file_list(dir, &files);
-        closedir(dir);
-
-        Menu_State menu = {0};
-        if (NULL != state) menu = *state;
-
-        // Add 4 to skip past "rom/"
-        if (strlen(filename) > 4) {
-            int current = find_file(&files, filename + 4);
-            if (current >= 0) menu.cursor = current;
-        }
-
-        action = run_menu(plat, &menu, &files, 20);
-
-        if (Action_OK == action) {
-            if (    menu.cursor >= 0 &&
-                    menu.cursor < files.count) {
-                snprintf(filename, sz_filename - 1,
-                         "%s/%s", "rom", files.files[menu.cursor]);
-            } else {
-                action = Action_Cancel;
-            }
-        }
-
-        free_file_list(&files);
-
-        if (NULL != state) *state = menu;
-    }
-
-    return action;
-}
-
 static nese_Action nese_load_cart(platform_data* plat, const char* filename) {
     nese_Action action = Action_OK;
     unload_cart(&plat->cart);
@@ -621,46 +465,6 @@ static nese_Action select_rom(platform_data* plat, char* file, int sz_file) {
     return action;
 }
 
-static nese_Action run_game_menu(platform_data* plat, Menu_State* state) {
-    static char* items[] = {
-        "Resume",
-        "Save",
-        "Restore",
-        "Reset",
-        "Select ROM",
-        "Exit",
-    };
-    static const nese_Action choices[] = {
-        Action_Cancel,
-        Action_Save,
-        Action_Load,
-        Action_Reset,
-        Action_Menu,
-        Action_Quit,
-    };
-    static const File_List options = {
-        .files = items,
-        .count = (sizeof(items) / sizeof(*items)),
-    };
-
-    Menu_State menu = {0};
-    if (NULL != state) menu = *state;
-
-    nese_Action action = run_menu(plat, &menu, &options, 100);
-    if (Action_Menu == action) {
-        action = Action_Cancel;
-    } else if (Action_OK == action) {
-        if (    menu.cursor >= 0 &&
-                menu.cursor < (sizeof(choices) / sizeof(*choices))) {
-            action = choices[menu.cursor];
-        }
-    }
-
-    if (NULL != state) *state = menu;
-
-    return action;
-}
-
 static nese_Action game_menu(platform_data* plat) {
     nese_Action action = Action_OK;
     Menu_State menu = {0};
diff --git a/src/list.c b/src/list.c
new file mode 100644
index 0000000..52387b8
--- /dev/null
+++ b/src/list.c
@@ -0,0 +1,59 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "list.h"
+
+
+static int cmp_files(const void* _a, const void* _b) {
+    const char* a = *(const char**)_a;
+    const char* b = *(const char**)_b;
+
+    int diff = 0;
+    for (char ca = 1, cb = 1; ca && cb && 0 == diff; ++a, ++b) {
+        // Cut extensions; replace underscore with space
+        ca = (*a == '_' ? ' ' : (*a == '.' ? '\0' : *a));
+        cb = (*b == '_' ? ' ' : (*b == '.' ? '\0' : *b));
+        diff = (ca - cb);
+    }
+
+    return diff;
+}
+
+static int count_files(DIR* dir) {
+    int count = 0;
+    struct dirent* de = NULL;
+    while (NULL != (de = readdir(dir))) {
+        if ('.' != de->d_name[0]) ++count;
+    }
+    rewinddir(dir);
+    return count;
+}
+
+
+void make_file_list(DIR* dir, File_List* files) {
+    files->count = count_files(dir);
+    files->files = calloc(files->count, sizeof(char*));
+    struct dirent* de = NULL;
+    int i_file = 0;
+    while (NULL != (de = readdir(dir))) {
+        if ('.' != de->d_name[0]) {
+            files->files[i_file] = strdup(de->d_name);
+            ++i_file;
+        }
+    }
+    qsort(files->files, files->count, sizeof(char*), cmp_files);
+}
+
+void free_file_list(File_List* files) {
+    for (int i = 0; i < files->count; ++i) {
+        free(files->files[i]);
+    }
+    free(files->files);
+}
+
+int find_file(File_List* files, const char* filename) {
+    int i = (files->count - 1);
+    for ( ; i >= 0 &&
+            (0 != strcmp(files->files[i], filename)); --i);
+    return i;
+}
diff --git a/src/list.h b/src/list.h
new file mode 100644
index 0000000..18541f4
--- /dev/null
+++ b/src/list.h
@@ -0,0 +1,14 @@
+#ifndef NESE_LIST_H_
+#define NESE_LIST_H_
+
+#include <dirent.h>
+
+#include "menu.h"
+
+
+void make_file_list(DIR* dir, File_List* files);
+void free_file_list(File_List* files);
+int find_file(File_List* files, const char* filename);
+
+
+#endif // NESE_LIST_H_
diff --git a/src/menus.c b/src/menus.c
new file mode 100644
index 0000000..b648c2d
--- /dev/null
+++ b/src/menus.c
@@ -0,0 +1,90 @@
+#include <string.h>
+
+#include "draw.h"
+#include "list.h"
+#include "menus.h"
+
+
+nese_Action run_rom_menu(void* plat, Menu_State* state,
+                         char* filename, int sz_filename) {
+    nese_Action action = Action_Cancel;
+
+    DIR* dir = opendir("rom");
+
+    if (NULL == dir) {
+        modal_popup(plat, "No ROMS found!\nPress any key to exit",
+                    color_error);
+
+    } else {
+        File_List files = {0};
+        make_file_list(dir, &files);
+        closedir(dir);
+
+        Menu_State menu = {0};
+        if (NULL != state) menu = *state;
+
+        // Add 4 to skip past "rom/"
+        if (strlen(filename) > 4) {
+            int current = find_file(&files, filename + 4);
+            if (current >= 0) menu.cursor = current;
+        }
+
+        action = run_menu(plat, &menu, &files, 20);
+
+        if (Action_OK == action) {
+            if (    menu.cursor >= 0 &&
+                    menu.cursor < files.count) {
+                snprintf(filename, sz_filename - 1,
+                         "%s/%s", "rom", files.files[menu.cursor]);
+            } else {
+                action = Action_Cancel;
+            }
+        }
+
+        free_file_list(&files);
+
+        if (NULL != state) *state = menu;
+    }
+
+    return action;
+}
+
+nese_Action run_game_menu(void* plat, Menu_State* state) {
+    static char* items[] = {
+        "Resume",
+        "Save",
+        "Restore",
+        "Reset",
+        "Select ROM",
+        "Exit",
+    };
+    static const nese_Action choices[] = {
+        Action_Cancel,
+        Action_Save,
+        Action_Load,
+        Action_Reset,
+        Action_Menu,
+        Action_Quit,
+    };
+    static const File_List options = {
+        .files = items,
+        .count = (sizeof(items) / sizeof(*items)),
+    };
+
+    Menu_State menu = {0};
+    if (NULL != state) menu = *state;
+
+    nese_Action action = run_menu(plat, &menu, &options, 100);
+    if (Action_Menu == action) {
+        action = Action_Cancel;
+    } else if (Action_OK == action) {
+        if (    menu.cursor >= 0 &&
+                menu.cursor < (sizeof(choices) / sizeof(*choices))) {
+            action = choices[menu.cursor];
+        }
+    }
+
+    if (NULL != state) *state = menu;
+
+    return action;
+}
diff --git a/src/menus.h b/src/menus.h
new file mode 100644
index 0000000..80c7c6e
--- /dev/null
+++ b/src/menus.h
@@ -0,0 +1,13 @@
+#ifndef NESE_MENUS_H_
+#define NESE_MENUS_H_
+
+#include "menu.h"
+
+
+nese_Action run_rom_menu(void* plat, Menu_State* state,
+                         char* filename, int sz_filename);
+
+nese_Action run_game_menu(void* plat, Menu_State* state);
+
+
+#endif // NESE_MENUS_H_
diff --git a/src/state.c b/src/state.c
new file mode 100644
index 0000000..bd9b339
--- /dev/null
+++ b/src/state.c
@@ -0,0 +1,57 @@
+#include "state.h"
+
+
+#define ACTION_DELAY    (60U * 1U)
+#define ACTION_NOTIFY   (60U * 3U)
+
+
+void action_immediate(Action_State* state, nese_Action action) {
+    state->action = action;
+    state->timer = 0;
+}
+
+void action_start(Action_State* state, nese_Action action, Overlay* overlay) {
+    if (state->action != Action_OK) {
+        // We can't do two things at once - cancel the current action
+        overlay_clear_message(overlay, state->msg_id);
+        state->action = Action_OK;
+
+    } else {
+        state->action = action;
+
+        const char* op = NULL;
+        if (Action_Load == action) op = "Restoring ...";
+        else if (Action_Save == action) op = "Saving ...";
+        else if (Action_Reset == action) op = "Resetting ...";
+        if (NULL != op) {
+            state->timer = ACTION_DELAY;
+            state->msg_id = overlay_add_message(overlay, op, state->timer);
+        } else {
+            state->timer = 0;
+        }
+    }
+}
+
+nese_Action action_tick(Action_State* state, Overlay* overlay) {
+    nese_Action action = Action_OK;
+
+    if (state->action != Action_OK && --state->timer <= 0) {
+        action = state->action;
+        state->action = Action_OK;
+        overlay_clear_message(overlay, state->msg_id);
+    }
+
+    return action;
+}
+
+int action_notify(nese_Action action, int status, Overlay* overlay) {
+    int msg_id = 0;
+    const char* op = NULL;
+    if (Action_Load == action) op = (status < 0 ? "Restore failed" : "Restored");
+    else if (Action_Save == action) op = (status < 0 ? "Save failed" : "Saved");
+    else if (Action_Reset == action) op = "Reset";
+    if (NULL != op) {
+        msg_id = overlay_add_message(overlay, op, ACTION_NOTIFY);
+    }
+    return msg_id;
+}
diff --git a/src/state.h b/src/state.h
new file mode 100644
index 0000000..65ac9a5
--- /dev/null
+++ b/src/state.h
@@ -0,0 +1,21 @@
+#ifndef NESE_STATE_H_
+#define NESE_STATE_H_
+
+#include "action.h"
+#include "overlay.h"
+
+
+typedef struct {
+    int timer;
+    int msg_id;
+    nese_Action action;
+} Action_State;
+
+
+void action_immediate(Action_State* state, nese_Action action);
+void action_start(Action_State* state, nese_Action action, Overlay* overlay);
+nese_Action action_tick(Action_State* state, Overlay* overlay);
+int action_notify(nese_Action action, int status, Overlay* overlay);
+
+
+#endif // NESE_STATE_H_