diff --git a/inc/debug.h b/inc/debug.h
index a585da4..26d13f2 100644
--- a/inc/debug.h
+++ b/inc/debug.h
@@ -13,6 +13,9 @@ void dbg_draw_frame_info_start();
 void dbg_draw_frame_info_end();
 int dbg_printf(const char* fmt, ...);
 void dbg_init();
+void dbg_dump_scl_flags(DWORD flags);
+void dbg_dump_edm_flags(DWORD flags);
+void dbg_dump_dds_flip_flags(DWORD flags);
 void dbg_dump_dds_blt_flags(DWORD flags);
 void dbg_dump_dds_blt_fx_flags(DWORD flags);
 void dbg_dump_dds_caps(DWORD caps);
diff --git a/src/dd.c b/src/dd.c
index 969bbee..917c7fa 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -23,6 +23,8 @@ HRESULT dd_EnumDisplayModes(
     LPVOID lpContext,
     LPDDENUMMODESCALLBACK lpEnumModesCallback)
 {
+    dbg_dump_edm_flags(dwFlags);
+
     DWORD i = 0;
     DDSURFACEDESC2 s;
 
@@ -821,7 +823,7 @@ HRESULT dd_SetDisplayMode(DWORD dwWidth, DWORD dwHeight, DWORD dwBPP, DWORD dwFl
 
 HRESULT dd_SetCooperativeLevel(HWND hwnd, DWORD dwFlags)
 {
-    PIXELFORMATDESCRIPTOR pfd;
+    dbg_dump_scl_flags(dwFlags);
 
     if (hwnd == NULL)
     {
@@ -843,9 +845,10 @@ HRESULT dd_SetCooperativeLevel(HWND hwnd, DWORD dwFlags)
         {
             g_ddraw->render.hdc = GetDC(g_ddraw->hwnd);
 
+            PIXELFORMATDESCRIPTOR pfd;
             memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
-
             pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
+
             pfd.nVersion = 1;
             pfd.dwFlags =
                 PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER | (g_ddraw->renderer == ogl_render_main ? PFD_SUPPORT_OPENGL : 0);
diff --git a/src/ddsurface.c b/src/ddsurface.c
index 817196f..4e001da 100644
--- a/src/ddsurface.c
+++ b/src/ddsurface.c
@@ -699,6 +699,8 @@ HRESULT dds_EnumAttachedSurfaces(
 
 HRESULT dds_Flip(IDirectDrawSurfaceImpl* This, IDirectDrawSurfaceImpl* lpDDSurfaceTargetOverride, DWORD dwFlags)
 {
+    dbg_dump_dds_flip_flags(dwFlags);
+
     if (This->backbuffer)
     {
         EnterCriticalSection(&g_ddraw->cs);
diff --git a/src/debug.c b/src/debug.c
index 2d9647a..d7502cf 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -218,6 +218,93 @@ void dbg_draw_frame_info_end()
         g_dbg_frame_time = dbg_counter_stop();
 }
 
+void dbg_dump_scl_flags(DWORD flags)
+{
+#ifdef _DEBUG_X
+    if (flags & DDSCL_FULLSCREEN) {
+        TRACE("     DDSCL_FULLSCREEN\n");
+    }
+    if (flags & DDSCL_ALLOWREBOOT) {
+        TRACE("     DDSCL_ALLOWREBOOT\n");
+    }
+    if (flags & DDSCL_NOWINDOWCHANGES) {
+        TRACE("     DDSCL_NOWINDOWCHANGES\n");
+    }
+    if (flags & DDSCL_NORMAL) {
+        TRACE("     DDSCL_NORMAL\n");
+    }
+    if (flags & DDSCL_EXCLUSIVE) {
+        TRACE("     DDSCL_EXCLUSIVE\n");
+    }
+    if (flags & DDSCL_ALLOWMODEX) {
+        TRACE("     DDSCL_ALLOWMODEX\n");
+    }
+    if (flags & DDSCL_SETFOCUSWINDOW) {
+        TRACE("     DDSCL_SETFOCUSWINDOW\n");
+    }
+    if (flags & DDSCL_SETDEVICEWINDOW) {
+        TRACE("     DDSCL_SETDEVICEWINDOW\n");
+    }
+    if (flags & DDSCL_CREATEDEVICEWINDOW) {
+        TRACE("     DDSCL_CREATEDEVICEWINDOW\n");
+    }
+    if (flags & DDSCL_MULTITHREADED) {
+        TRACE("     DDSCL_MULTITHREADED\n");
+    }
+    if (flags & DDSCL_FPUSETUP) {
+        TRACE("     DDSCL_FPUSETUP\n");
+    }
+    if (flags & DDSCL_FPUPRESERVE) {
+        TRACE("     DDSCL_FPUPRESERVE\n");
+    }
+#endif
+}
+
+void dbg_dump_edm_flags(DWORD flags)
+{
+#ifdef _DEBUG_X
+    if (flags & DDEDM_REFRESHRATES) {
+        TRACE("     DDEDM_REFRESHRATES\n");
+    }
+    if (flags & DDEDM_STANDARDVGAMODES) {
+        TRACE("     DDEDM_STANDARDVGAMODES\n");
+    }
+#endif
+}
+
+void dbg_dump_dds_flip_flags(DWORD flags)
+{
+#ifdef _DEBUG_X
+    if (flags & DDFLIP_WAIT) {
+        TRACE("     DDFLIP_WAIT\n");
+    }
+    if (flags & DDFLIP_EVEN) {
+        TRACE("     DDFLIP_EVEN\n");
+    }
+    if (flags & DDFLIP_ODD) {
+        TRACE("     DDFLIP_ODD\n");
+    }
+    if (flags & DDFLIP_NOVSYNC) {
+        TRACE("     DDFLIP_NOVSYNC\n");
+    }
+    if (flags & DDFLIP_INTERVAL2) {
+        TRACE("     DDFLIP_INTERVAL2\n");
+    }
+    if (flags & DDFLIP_INTERVAL3) {
+        TRACE("     DDFLIP_INTERVAL3\n");
+    }
+    if (flags & DDFLIP_INTERVAL4) {
+        TRACE("     DDFLIP_INTERVAL4\n");
+    }
+    if (flags & DDFLIP_STEREO) {
+        TRACE("     DDFLIP_STEREO\n");
+    }
+    if (flags & DDFLIP_DONOTWAIT) {
+        TRACE("     DDFLIP_DONOTWAIT\n");
+    }
+#endif
+}
+
 void dbg_dump_dds_blt_flags(DWORD flags)
 {
 #ifdef _DEBUG_X