summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/screen.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/emu/screen.c')
-rw-r--r--src/emu/screen.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/emu/screen.c b/src/emu/screen.c
index aece8df6d93..05aa8ac141b 100644
--- a/src/emu/screen.c
+++ b/src/emu/screen.c
@@ -782,6 +782,17 @@ void screen_device::register_screen_bitmap(bitmap_t &bitmap)
//-------------------------------------------------
+// vblank_port_read - custom port handler to
+// return a VBLANK state
+//-------------------------------------------------
+
+int screen_device::vblank_port_read()
+{
+ return vblank();
+}
+
+
+//-------------------------------------------------
// vblank_begin - call any external callbacks to
// signal the VBLANK period has begun
//-------------------------------------------------