nmi bug fix. still not displayed.

diff --git a/de0_cv_nes/ppu/ppu.vhd b/de0_cv_nes/ppu/ppu.vhd
index 16a83db..0014c89 100644 (file)
--- a/de0_cv_nes/ppu/ppu.vhd
+++ b/de0_cv_nes/ppu/ppu.vhd
@@ -429,7 +429,7 @@ begin
         if (pi_rst_n = '0') then\r
             reg_vblank_n <= '1';\r
         elsif (rising_edge(pi_base_clk)) then\r
-            if (reg_ppu_mask(PPUNEN) = '1' and pi_ppu_status(ST_VBL) = '1') then\r
+            if (reg_ppu_ctrl(PPUNEN) = '1' and pi_ppu_status(ST_VBL) = '1') then\r
                 reg_vblank_n <= '0';\r
             else\r
                 reg_vblank_n <= '1';\r