diff --git a/src/emulator.c b/src/emulator.c
index 73fcdab4..d61b0ef1 100644
--- a/src/emulator.c
+++ b/src/emulator.c
@@ -336,7 +336,9 @@ static void emu_start_tracing(struct emu *emu) {
 /*
  * dreamcast guest interface
  */
-static void emu_vertical_blank(void *userdata) {
+static void emu_vblank_in(void *userdata) {}
+
+static void emu_vblank_out(void *userdata) {
   struct emu *emu = userdata;
 
   emu->frame++;
@@ -735,7 +737,8 @@ struct emu *emu_create(struct host *host) {
   emu->dc->push_audio = &emu_push_audio;
   emu->dc->start_render = &emu_start_render;
   emu->dc->finish_render = &emu_finish_render;
-  emu->dc->vertical_blank = &emu_vertical_blank;
+  emu->dc->vblank_in = &emu_vblank_in;
+  emu->dc->vblank_out = &emu_vblank_out;
 
   /* add all textures to free list by default */
   for (int i = 0; i < ARRAY_SIZE(emu->textures); i++) {
diff --git a/src/guest/dreamcast.c b/src/guest/dreamcast.c
index b96e1966..eb0ce584 100644
--- a/src/guest/dreamcast.c
+++ b/src/guest/dreamcast.c
@@ -15,12 +15,20 @@
 #include "guest/scheduler.h"
 #include "guest/sh4/sh4.h"
 
-void dc_vertical_blank(struct dreamcast *dc) {
-  if (!dc->vertical_blank) {
+void dc_vblank_out(struct dreamcast *dc) {
+  if (!dc->vblank_out) {
     return;
   }
 
-  dc->vertical_blank(dc->userdata);
+  dc->vblank_out(dc->userdata);
+}
+
+void dc_vblank_in(struct dreamcast *dc) {
+  if (!dc->vblank_in) {
+    return;
+  }
+
+  dc->vblank_in(dc->userdata);
 }
 
 void dc_finish_render(struct dreamcast *dc) {
diff --git a/src/guest/dreamcast.h b/src/guest/dreamcast.h
index 56b8117c..26b2175c 100644
--- a/src/guest/dreamcast.h
+++ b/src/guest/dreamcast.h
@@ -135,7 +135,7 @@ struct device {
 typedef void (*push_audio_cb)(void *, const int16_t *, int);
 typedef void (*start_render_cb)(void *, struct ta_context *);
 typedef void (*finish_render_cb)(void *);
-typedef void (*vertical_blank_cb)(void *);
+typedef void (*vblank_cb)(void *);
 
 struct dreamcast {
   int running;
@@ -164,7 +164,8 @@ struct dreamcast {
   push_audio_cb push_audio;
   start_render_cb start_render;
   finish_render_cb finish_render;
-  vertical_blank_cb vertical_blank;
+  vblank_cb vblank_in;
+  vblank_cb vblank_out;
 };
 
 struct dreamcast *dc_create();
@@ -203,6 +204,7 @@ void dc_input(struct dreamcast *dc, int port, int button, int16_t value);
 void dc_push_audio(struct dreamcast *dc, const int16_t *data, int frames);
 void dc_start_render(struct dreamcast *dc, struct ta_context *ctx);
 void dc_finish_render(struct dreamcast *dc);
-void dc_vertical_blank(struct dreamcast *dc);
+void dc_vblank_in(struct dreamcast *dc);
+void dc_vblank_out(struct dreamcast *dc);
 
 #endif
diff --git a/src/guest/pvr/pvr.c b/src/guest/pvr/pvr.c
index 6133952b..0f929e56 100644
--- a/src/guest/pvr/pvr.c
+++ b/src/guest/pvr/pvr.c
@@ -53,7 +53,9 @@ static void pvr_next_scanline(void *data) {
   /* FIXME toggle SPG_STATUS.fieldnum on vblank? */
   if (!was_vsync && pvr->SPG_STATUS->vsync) {
     prof_counter_add(COUNTER_pvr_vblanks, 1);
-    dc_vertical_blank(pvr->dc);
+    dc_vblank_in(pvr->dc);
+  } else if (was_vsync && !pvr->SPG_STATUS->vsync) {
+    dc_vblank_out(pvr->dc);
   }
 
   /* reschedule */