If programmed VBSTRT == VBSTOP: vblank interrupt stops.

diff --git a/custom.cpp b/custom.cpp
index 90fa66c36e121ebf4e4269c3f43fff0aacd5f2eb..2ebe4d20b05665f2ac0a10afdc048ba0ab275449 100644 (file)
--- a/custom.cpp
+++ b/custom.cpp
@@ -14030,6 +14030,9 @@ static void hsync_handler_post(bool onvsync)
                                vbstop_m = vpos;
                                vb_end_line = true;
                                vb_state = false;
+                               if (vbstrt == vpos) {
+                                       vb_start_line = 0;
+                               }
                        }
                }