diff --git a/src/bus.c b/src/bus.c
index 06097fc..a18a97d 100644
--- a/src/bus.c
+++ b/src/bus.c
@@ -16,9 +16,11 @@
 #include "keyboard.h"
 #include "mouse.h"
 
+bool bus_requests_exit = false;
+
 extern struct timeval rtc_current_time;
 extern uint32_t rtc_uptime;
-
+;
 extern fox32_vm_t vm;
 extern disk_controller_t disk_controller;
 extern mouse_t mouse;
@@ -220,6 +222,12 @@ int bus_io_write(void *user, uint32_t value, uint32_t port) {
 
             break;
         };
+
+        case 0x80010000: { // power control port
+            if (value == 0) {
+                bus_requests_exit = true;
+            }
+        };
     }
 
     return 0;
diff --git a/src/main.c b/src/main.c
index 0feec46..4b18ddc 100644
--- a/src/main.c
+++ b/src/main.c
@@ -24,6 +24,7 @@
 
 fox32_vm_t vm;
 
+extern bool bus_requests_exit;
 extern disk_controller_t disk_controller;
 
 uint32_t tick_start;
@@ -95,7 +96,7 @@ int main(int argc, char *argv[]) {
     tick_start = SDL_GetTicks();
     tick_end = SDL_GetTicks();
 
-    while (!done) {
+    while (!done && !bus_requests_exit) {
         main_loop();
 
         tick_end = SDL_GetTicks();