Avoid drawing the whole screen on each frame

This allows supporting 386DX "just about" (there will be flickering).

1 files changed, 5 insertions, 3 deletions

diff --git a/src/menu.c b/src/menu.c
index 4eeed8e..3d4456e 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -63,7 +63,7 @@ static void render_cast()
         put_text(dst.x + 16 + 8, dst.y + 6, names[i], i + 2);
 
         wait_vsync();
-        blit_update();
+        blit_copy_all();
 
         wait_frames(32);
 
@@ -77,6 +77,7 @@ uint8_t run_menu()
     uint8_t cast = 0;
     uint8_t wait;
 
+    blit_target(TARGET_BUFFER);
     while (1)
     {
         if (keys[KEY_ESC])
@@ -100,7 +101,7 @@ uint8_t run_menu()
             }
 
             wait_vsync();
-            blit_update();
+            blit_copy_all();
         }
 
         /* if is not cast, we do the "blink" effect */
@@ -113,8 +114,9 @@ uint8_t run_menu()
                     wait = 0;
 
                 put_text(84, 110, "PRESS SPACE TO PLAY", wait ? 0 : 1);
+
                 wait_vsync();
-                blit_update();
+                blit_copy_all();
             }
         }