dma testbench setup timing violation. why??

diff --git a/de0_cv_nes/dummy-mos6502.vhd b/de0_cv_nes/dummy-mos6502.vhd
index 017f713..6c5eadf 100644 (file)
--- a/de0_cv_nes/dummy-mos6502.vhd
+++ b/de0_cv_nes/dummy-mos6502.vhd
@@ -332,45 +332,45 @@ end;
 \r
                     elsif (global_step_cnt = 4) then\r
                         --step3 = dma set.\r
-                        for i in 0 to 64 loop\r
-                            j := i * 4;\r
-                            if (ch = 16#5b#) then\r
-                                ch := 16#41#;\r
-                            else\r
-                                ch := 16#41# + i;\r
-                            end if;\r
-\r
-                            --if (i < 64) then\r
-                            if (i < 10) then\r
-                                --set dma value on the ram.\r
-                                if    (dma_step_cnt = (0 + j) * cpu_io_multi) then\r
-                                    io_out(16#0200# + j, i);\r
-                                elsif (dma_step_cnt = (1 + j) * cpu_io_multi) then\r
-                                    io_out(16#0201# + j, ch);\r
-                                elsif (dma_step_cnt = (2 + j) * cpu_io_multi) then\r
-                                    io_out(16#0202# + j, 16#01#);\r
-                                elsif (dma_step_cnt = (3 + j) * cpu_io_multi) then\r
-                                    io_out(16#0203# + j, j);\r
-                                elsif (dma_step_cnt = (0 + j) * cpu_io_multi + 1) or\r
-                                        (dma_step_cnt = (1 + j) * cpu_io_multi + 1) or\r
-                                        (dma_step_cnt = (2 + j) * cpu_io_multi + 1) or\r
-                                        (dma_step_cnt = (3 + j) * cpu_io_multi + 1) then\r
-                                    io_brk;\r
-                                end if;\r
-                            else\r
-                                if    (dma_step_cnt = (0 + j) * cpu_io_multi) then\r
-                                    --start dma\r
-                                    io_out(16#4014#, 16#02#);\r
-                                elsif (dma_step_cnt = (0 + j) * cpu_io_multi + 1) then\r
-                                    io_brk;\r
-                                elsif (dma_step_cnt = (0 + j) * cpu_io_multi + 2) then\r
+--                        for i in 0 to 64 loop\r
+--                            j := i * 4;\r
+--                            if (ch = 16#5b#) then\r
+--                                ch := 16#41#;\r
+--                            else\r
+--                                ch := 16#41# + i;\r
+--                            end if;\r
+--\r
+--                            --if (i < 64) then\r
+--                            if (i < 10) then\r
+--                                --set dma value on the ram.\r
+--                                if    (dma_step_cnt = (0 + j) * cpu_io_multi) then\r
+--                                    io_out(16#0200# + j, i);\r
+--                                elsif (dma_step_cnt = (1 + j) * cpu_io_multi) then\r
+--                                    io_out(16#0201# + j, ch);\r
+--                                elsif (dma_step_cnt = (2 + j) * cpu_io_multi) then\r
+--                                    io_out(16#0202# + j, 16#01#);\r
+--                                elsif (dma_step_cnt = (3 + j) * cpu_io_multi) then\r
+--                                    io_out(16#0203# + j, j);\r
+--                                elsif (dma_step_cnt = (0 + j) * cpu_io_multi + 1) or\r
+--                                        (dma_step_cnt = (1 + j) * cpu_io_multi + 1) or\r
+--                                        (dma_step_cnt = (2 + j) * cpu_io_multi + 1) or\r
+--                                        (dma_step_cnt = (3 + j) * cpu_io_multi + 1) then\r
+--                                    io_brk;\r
+--                                end if;\r
+--                            else\r
+--                                if    (dma_step_cnt = (0 + j) * cpu_io_multi) then\r
+--                                    --start dma\r
+--                                    io_out(16#4014#, 16#02#);\r
+--                                elsif (dma_step_cnt = (0 + j) * cpu_io_multi + 1) then\r
+--                                    io_brk;\r
+--                                elsif (dma_step_cnt = (0 + j) * cpu_io_multi + 2) then\r
                                     io_brk;\r
                                     global_step_cnt := global_step_cnt + 1;\r
-                                end if;\r
-                            end if;\r
-                        end loop;\r
-                        \r
-                        dma_step_cnt := dma_step_cnt + 1;\r
+--                                end if;\r
+--                            end if;\r
+--                        end loop;\r
+--                        \r
+--                        dma_step_cnt := dma_step_cnt + 1;\r
 \r
                     elsif (global_step_cnt = 5) then\r
                         --step4 = scroll test and ppu reg read test.\r