ale bug fix..

diff --git a/de1_nes/ppu/ppu_registers.vhd b/de1_nes/ppu/ppu_registers.vhd
index b09c366..d4cf0c6 100644 (file)
--- a/de1_nes/ppu/ppu_registers.vhd
+++ b/de1_nes/ppu/ppu_registers.vhd
@@ -105,7 +105,8 @@ signal q_out : std_logic_vector(13 downto 0);
 signal ale_n : std_logic;\r
 
 begin\r
-    d_in <= vram_a & vram_ad;
+    d_in <= vram_a & vram_ad;\r
+    ale_n <= not ale;
     out_reg_inst : d_flip_flop generic map (14)\r
             port map (clk, '1', '1', ale_n, d_in, q_out);\r
     tsb_inst : tri_state_buffer generic map (14)\r