diff --git a/native/dosbox b/native/dosbox
index 68c5d76e..98d1639f 160000
--- a/native/dosbox
+++ b/native/dosbox
@@ -1 +1 @@
-Subproject commit 68c5d76e475a6ef03b9a73f67ce230a814bc1b67
+Subproject commit 98d1639f66ec91652f5661cf2f4df689721a73e0
diff --git a/native/dosbox-x b/native/dosbox-x
index 9cbf324f..c35f8367 160000
--- a/native/dosbox-x
+++ b/native/dosbox-x
@@ -1 +1 @@
-Subproject commit 9cbf324f5de55c056af81e318b02da56680da72b
+Subproject commit c35f8367e51bb41717645021e09ad7ffec0b195a
diff --git a/native/jsdos/include/jsdos-asyncify.h b/native/jsdos/include/jsdos-asyncify.h
index a6a18298..ef2faa31 100644
--- a/native/jsdos/include/jsdos-asyncify.h
+++ b/native/jsdos/include/jsdos-asyncify.h
@@ -12,7 +12,7 @@ namespace jsdos {
   void asyncifyLock();
   void asyncifyUnlock();
   void destroyAsyncify();
-  void incCycles();
+  void incCycles(int32_t count);
   uint32_t getAndResetCycles();
 }
 
diff --git a/native/jsdos/jsdos-asyncify.cpp b/native/jsdos/jsdos-asyncify.cpp
index 6c3dc15c..f8e595ff 100644
--- a/native/jsdos/jsdos-asyncify.cpp
+++ b/native/jsdos/jsdos-asyncify.cpp
@@ -245,8 +245,10 @@ namespace {
   std::atomic_uint32_t cycles(0);
 }
 
-void jsdos::incCycles() {
-  ::cycles++;
+void jsdos::incCycles(int32_t count) {
+    if (count > 0) {
+        ::cycles += count;
+    }
 }
 
 uint32_t jsdos::getAndResetCycles() {