diff --git a/Core/gb.c b/Core/gb.c
index 0f027ef..d177822 100644
--- a/Core/gb.c
+++ b/Core/gb.c
@@ -1206,6 +1206,11 @@ void GB_set_async_input_callback(GB_gameboy_t *gb, GB_input_callback_t callback)
 #endif
 }
 
+void GB_set_execution_callback(GB_gameboy_t *gb, GB_execution_callback_t callback)
+{
+    gb->execution_callback = callback;
+}
+
 const GB_palette_t GB_PALETTE_GREY = {{{0x00, 0x00, 0x00}, {0x55, 0x55, 0x55}, {0xaa, 0xaa, 0xaa}, {0xff, 0xff, 0xff}, {0xff, 0xff, 0xff}}};
 const GB_palette_t GB_PALETTE_DMG  = {{{0x08, 0x18, 0x10}, {0x39, 0x61, 0x39}, {0x84, 0xa5, 0x63}, {0xc6, 0xde, 0x8c}, {0xd2, 0xe6, 0xa6}}};
 const GB_palette_t GB_PALETTE_MGB  = {{{0x07, 0x10, 0x0e}, {0x3a, 0x4c, 0x3a}, {0x81, 0x8d, 0x66}, {0xc2, 0xce, 0x93}, {0xcf, 0xda, 0xac}}};
diff --git a/Core/gb.h b/Core/gb.h
index cbe4601..872ab19 100644
--- a/Core/gb.h
+++ b/Core/gb.h
@@ -283,6 +283,8 @@ typedef void (*GB_icd_hreset_callback_t)(GB_gameboy_t *gb);
 typedef void (*GB_icd_vreset_callback_t)(GB_gameboy_t *gb);
 typedef void (*GB_boot_rom_load_callback_t)(GB_gameboy_t *gb, GB_boot_rom_t type);
 
+typedef void (*GB_execution_callback_t)(GB_gameboy_t *gb, uint16_t address, uint8_t opcode);
+
 struct GB_breakpoint_s;
 struct GB_watchpoint_s;
 
@@ -665,6 +667,7 @@ struct GB_gameboy_internal_s {
         GB_print_image_callback_t printer_callback;
         GB_workboy_set_time_callback workboy_set_time_callback;
         GB_workboy_get_time_callback workboy_get_time_callback;
+        GB_execution_callback_t execution_callback;
 
         /*** Debugger ***/
         volatile bool debug_stopped, debug_disable;
@@ -839,6 +842,8 @@ void GB_set_update_input_hint_callback(GB_gameboy_t *gb, GB_update_input_hint_ca
 /* Called when a new boot ROM is needed. The callback should call GB_load_boot_rom or GB_load_boot_rom_from_buffer */
 void GB_set_boot_rom_load_callback(GB_gameboy_t *gb, GB_boot_rom_load_callback_t callback);
     
+void GB_set_execution_callback(GB_gameboy_t *gb, GB_execution_callback_t callback);
+    
 void GB_set_palette(GB_gameboy_t *gb, const GB_palette_t *palette);
 
 /* These APIs are used when using internal clock */
diff --git a/Core/sm83_cpu.c b/Core/sm83_cpu.c
index 4980871..85db7ae 100644
--- a/Core/sm83_cpu.c
+++ b/Core/sm83_cpu.c
@@ -1655,7 +1655,10 @@ void GB_cpu_run(GB_gameboy_t *gb)
     /* Run mode */
     else if (!gb->halted) {
         gb->last_opcode_read = cycle_read(gb, gb->pc++);
-        if (gb->halt_bug) {
+        if (unlikely(gb->execution_callback)) {
+            gb->execution_callback(gb, gb->pc - 1, gb->last_opcode_read);
+        }
+        if (unlikely(gb->halt_bug)) {
             gb->pc--;
             gb->halt_bug = false;
         }