diff --git a/Apps/GameBoy/main/Source/main.c b/Apps/GameBoy/main/Source/main.c
index 6030718..b0c5183 100644
--- a/Apps/GameBoy/main/Source/main.c
+++ b/Apps/GameBoy/main/Source/main.c
@@ -14,7 +14,16 @@
 
 #include <lvgl.h>
 #include <esp_log.h>
+
+/* Board firmware 0.8.0-dev/IDF 5.3.2 does not export esp_log for side-loaded ELFs. */
+#undef ESP_LOGI
+#undef ESP_LOGW
+#undef ESP_LOGE
+#define ESP_LOGI(tag, fmt, ...) do { (void)(tag); } while (0)
+#define ESP_LOGW(tag, fmt, ...) do { (void)(tag); } while (0)
+#define ESP_LOGE(tag, fmt, ...) do { (void)(tag); } while (0)
 #include <esp_heap_caps.h>
+#include <esp_timer.h>
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -29,8 +38,8 @@
 #include "peanut_gb.h"
 
 #define TAG "GameBoy"
-#define DEFAULT_ROM_PATH "/sdcard/roms/gb/default.gb"
-#define ROMS_DIR "/sdcard/roms/gb"
+#define DEFAULT_ROM_PATH "/data/roms/gb/default.gb"
+#define ROMS_DIR "/data/roms/gb"
 #define MAX_ROMS 64
 #define MAX_PATH 512
 #define MAX_ROM_SIZE (2 * 1024 * 1024)
@@ -91,6 +100,8 @@ typedef struct {
     bool emu_running;
     bool framebuffer_allocated;
     bool rom_loaded;
+    uint32_t fps_frames;
+    int64_t fps_last_us;
 } AppCtx;
 
 typedef struct {
@@ -242,11 +253,23 @@ static void scan_rom_dir(AppCtx* ctx) {
 /* Emu timer */
 static void emu_timer_cb(lv_timer_t* timer) {
     AppCtx* ctx=(AppCtx*)lv_timer_get_user_data(timer);
-    if (!ctx || !ctx->emu_running || !ctx->rom_loaded) return;
-    if (!ctx->canvas || !ctx->fb_native) return;
-    ctx->gb.direct.joypad=ctx->joypad_state;
+    if (!ctx || !ctx->emu_running || !ctx->rom_loaded || !ctx->canvas) return;
+    ctx->gb.direct.joypad = ctx->joypad_state;
     gb_run_frame(&ctx->gb);
     lv_obj_invalidate(ctx->canvas);
+    ctx->fps_frames++;
+    int64_t now = esp_timer_get_time();
+    if (ctx->fps_last_us == 0) ctx->fps_last_us = now;
+    int64_t elapsed = now - ctx->fps_last_us;
+    if (elapsed >= 1000000) {
+        uint32_t fps = (uint32_t)((ctx->fps_frames * 1000000ULL) / (uint64_t)elapsed);
+        if (ctx->status_label) {
+            lv_label_set_text_fmt(ctx->status_label, "GB: %s  FPS:%lu", ctx->rom_title[0] ? ctx->rom_title : "GameBoy", (unsigned long)fps);
+        }
+        printf("GAMEBOY_FPS %lu\n", (unsigned long)fps);
+        ctx->fps_frames = 0;
+        ctx->fps_last_us = now;
+    }
 }
 
 /* Input helpers */
@@ -310,7 +333,7 @@ static void default_rom_event(lv_event_t* e){
     if (load_rom_file(ctx, DEFAULT_ROM_PATH)){
         switch_to_emu(ctx);
     } else {
-        if (ctx->status_label) lv_label_set_text(ctx->status_label, "default.gb not found in /sdcard/roms/gb/");
+        if (ctx->status_label) lv_label_set_text(ctx->status_label, "default.gb not found in /data/roms/gb/");
     }
 }
 static void back_to_menu_event(lv_event_t* e){
@@ -343,7 +366,7 @@ static void build_browser_ui(AppCtx* ctx, lv_obj_t* parent){
 
     if (ctx->rom_count==0){
         lv_obj_t* lbl=lv_label_create(parent);
-        lv_label_set_text(lbl, "No ROMs found in /sdcard/roms/gb\nPut .gb files there.");
+        lv_label_set_text(lbl, "No ROMs found in /data/roms/gb\nPut .gb files there.");
         lv_obj_set_style_text_color(lbl, lv_color_white(), 0);
     } else {
         for (int i=0;i<ctx->rom_count;i++){
@@ -379,7 +402,8 @@ static void build_emu_ui(AppCtx* ctx, lv_obj_t* parent){
     lv_obj_set_style_bg_color(info_bar, lv_color_hex(0x222222), 0);
 
     lv_obj_t* title_lbl=lv_label_create(info_bar);
-    lv_label_set_text_fmt(title_lbl, "GB: %s", ctx->rom_title[0]?ctx->rom_title:"GameBoy");
+    ctx->status_label = title_lbl;
+    lv_label_set_text_fmt(title_lbl, "GB: %s  FPS:--", ctx->rom_title[0]?ctx->rom_title:"GameBoy");
     lv_obj_set_style_text_color(title_lbl, lv_color_white(), 0);
 
     lv_obj_t* spacer=lv_obj_create(info_bar);
@@ -409,18 +433,10 @@ static void build_emu_ui(AppCtx* ctx, lv_obj_t* parent){
     }
 
     if (ctx->fb_native){
-        lv_coord_t disp_w=lv_display_get_horizontal_resolution(NULL);
-        lv_coord_t disp_h=lv_display_get_vertical_resolution(NULL);
-        int scale=1;
-        if (disp_w>=FRAME_W*2 && disp_h>=FRAME_H*3) scale=2;
-        if (disp_w>=FRAME_W*3 && disp_h>=FRAME_H*4) scale=3;
-        lv_obj_t* canvas=lv_canvas_create(canvas_cont);
-        ctx->canvas=canvas;
-        lv_canvas_set_buffer(canvas, ctx->fb_native, FRAME_W, FRAME_H, LV_COLOR_FORMAT_RGB565);
-        (void)scale; /* Prototype: avoid non-exported LVGL transform-scale symbols in side-loaded app. */
-        lv_obj_set_style_border_width(canvas,1,0);
-        lv_obj_set_style_border_color(canvas, lv_color_hex(0x555555),0);
-        lv_obj_center(canvas);
+        ctx->canvas = lv_canvas_create(canvas_cont);
+        lv_canvas_set_buffer(ctx->canvas, ctx->fb_native, FRAME_W, FRAME_H, LV_COLOR_FORMAT_RGB565);
+        lv_obj_set_style_border_width(ctx->canvas, 1, 0);
+        lv_obj_set_style_border_color(ctx->canvas, lv_color_hex(0x444444), 0);
     } else {
         lv_obj_t* err=lv_label_create(canvas_cont); lv_label_set_text(err,"FB alloc failed"); lv_obj_set_style_text_color(err, lv_color_white(),0);
     }
@@ -495,6 +511,8 @@ static void build_emu_ui(AppCtx* ctx, lv_obj_t* parent){
     }
 
     if (ctx->emu_timer){ lv_timer_delete(ctx->emu_timer); ctx->emu_timer=NULL; }
+    ctx->fps_frames = 0;
+    ctx->fps_last_us = esp_timer_get_time();
     ctx->emu_timer=lv_timer_create(emu_timer_cb, TICK_MS, ctx);
     ctx->emu_running=true;
     ctx->mode=APP_MODE_EMU;