diff --git a/client.py b/client.py
index 49baa91..402351c 100644
--- a/client.py
+++ b/client.py
@@ -36,6 +36,7 @@ def do(ser, b):
     ser.flush()
     ser.flushInput()
     ser.flushOutput()
+    _ = ser.read(ser.in_waiting)
 
     ret = sync(ser, b'DATA')
     print(ret)
diff --git a/common.mk b/common.mk
index 8dcd9e4..484e412 100644
--- a/common.mk
+++ b/common.mk
@@ -59,6 +59,9 @@ MAIN_OBJ = \
 
 all: main.cdi
 
+%.bin.o: %.bin
+	$(BUILD_BINARY_O)
+
 %.o: %.obj
 	$(OBJCOPY) -g \
 		--rename-section IP=.text.$* \
diff --git a/vga.cpp b/vga.cpp
index b9646af..8974135 100644
--- a/vga.cpp
+++ b/vga.cpp
@@ -166,7 +166,22 @@ void vga()
   v_sync_in();
 
   holly.VO_BORDER_COL = (63 << 5) | (31 << 0);
-  holly.VO_CONTROL = 0x0016;
+  //holly.VO_CONTROL = 0x0016;
+  uint32_t hsync_pol    = 0;
+  uint32_t vsync_pol    = 0;
+  uint32_t blank_pol    = 0;
+  uint32_t blank_video  = 0;
+  uint32_t field_mode   = 0;
+  uint32_t pixel_double = 0;
+  uint32_t pclk_delay   = 0x16;
+  HOLLY.VO_CONTROL = 0
+    | (( pclk_delay   & 0x3f) << 16 )
+    | (( pixel_double & 0x01) <<  8 )
+    | (( field_mode   & 0x0f) <<  4 )
+    | (( blank_video  & 0x01) <<  3 )
+    | (( blank_pol    & 0x01) <<  2 )
+    | (( vsync_pol    & 0x01) <<  1 )
+    | (( hsync_pol    & 0x01) <<  0 );
 
   holly.SOFTRESET = 0b000;
 }