git.zerfleddert.de Git - fpga-games/blob - galaxian/src/roms.v

   1 module galaxian_roms(
   2 I_CLK_18432M,
   3 I_CLK_12M,
   4 I_ADDR,
   5 O_DATA
   6 );
   7
   8 input I_CLK_12M;
   9 input I_CLK_18432M;
  10 input [18:0]I_ADDR;
  11 output [7:0]O_DATA;
  12
  13 //CPU-Roms
  14 wire [7:0]U_ROM_D;
  15 reg [10:0]U_ROM_A;
  16
  17 GALAXIAN_U U_ROM(
  18 .CLK(I_CLK_12M),
  19 .ADDR(U_ROM_A),
  20 .DATA(U_ROM_D),
  21 .ENA(1'b1)
  22 );
  23
  24 wire [7:0]V_ROM_D;
  25 reg [10:0]V_ROM_A;
  26
  27 GALAXIAN_V V_ROM(
  28 .CLK(I_CLK_12M),
  29 .ADDR(V_ROM_A),
  30 .DATA(V_ROM_D),
  31 .ENA(1'b1)
  32 );
  33
  34 wire [7:0]W_ROM_D;
  35 reg [10:0]W_ROM_A;
  36
  37 GALAXIAN_W W_ROM(
  38 .CLK(I_CLK_12M),
  39 .ADDR(W_ROM_A),
  40 .DATA(W_ROM_D),
  41 .ENA(1'b1)
  42 );
  43
  44 wire [7:0]Y_ROM_D;
  45 reg [10:0]Y_ROM_A;
  46
  47 GALAXIAN_Y Y_ROM(
  48 .CLK(I_CLK_12M),
  49 .ADDR(Y_ROM_A),
  50 .DATA(Y_ROM_D),
  51 .ENA(1'b1)
  52 );
  53
  54 //7L CPU-Rom
  55 wire [7:0]L_ROM_D;
  56 reg [10:0]L_ROM_A;
  57
  58 GALAXIAN_7L L_ROM(
  59 .CLK(I_CLK_12M),
  60 .ADDR(L_ROM_A),
  61 .DATA(L_ROM_D),
  62 .ENA(1'b1)
  63 );
  64
  65 //1K VID-Rom
  66 wire [7:0]K_ROM_D;
  67 reg [10:0]K_ROM_A;
  68
  69 GALAXIAN_1K K_ROM(
  70 .CLK(I_CLK_12M),
  71 .ADDR(K_ROM_A),
  72 .DATA(K_ROM_D),
  73 .ENA(1'b1)
  74 );
  75
  76 //1H VID-Rom
  77 wire [7:0]H_ROM_D;
  78 reg [10:0]H_ROM_A;
  79
  80 GALAXIAN_1H H_ROM(
  81 .CLK(I_CLK_12M),
  82 .ADDR(H_ROM_A),
  83 .DATA(H_ROM_D),
  84 .ENA(1'b1)
  85 );
  86
  87 reg [7:0]DATA_OUT;
  88
  89 //    address map
  90 //--------------------------------------------------
  91 // 0x00000 - 0x007FF       galmidw.u        CPU-ROM
  92 // 0x00800 - 0x00FFF       galmidw.v        CPU-ROM
  93 // 0x01000 - 0x017FF       galmidw.w        CPU-ROM
  94 // 0x01800 - 0x01FFF       galmidw.y        CPU-ROM
  95 // 0x02000 - 0x027FF       7l               CPU-ROM
  96 // 0x04000 - 0x047FF       1k.bin           VID-ROM
  97 // 0x05000 - 0x057FF       1h.bin           VID-ROM
  98 // 0x10000 - 0x3FFFF       mc_wav_2.bin     Sound(Wav)Data
  99 always
 100 begin
 101         if (I_ADDR <= 18'h7ff) begin
 102                 //u
 103                 U_ROM_A <= I_ADDR[10:0];
 104                 DATA_OUT <= U_ROM_D;
 105         end
 106         if (I_ADDR >= 18'h800 && I_ADDR <= 18'hfff) begin
 107                 //v
 108                 V_ROM_A <= I_ADDR[10:0];
 109                 DATA_OUT <= V_ROM_D;
 110         end
 111         if (I_ADDR >= 18'h1000 && I_ADDR <= 18'h17ff) begin
 112                 //w
 113                 W_ROM_A <= I_ADDR[10:0];
 114                 DATA_OUT <= W_ROM_D;
 115         end
 116         if (I_ADDR >= 18'h1800 && I_ADDR <= 18'h1fff) begin
 117                 //y
 118                 Y_ROM_A <= I_ADDR[10:0];
 119                 DATA_OUT <= Y_ROM_D;
 120         end
 121         if (I_ADDR >= 18'h2000 && I_ADDR <= 18'h27ff) begin
 122                 //7l
 123                 L_ROM_A <= I_ADDR[10:0];
 124                 DATA_OUT <= L_ROM_D;
 125         end
 126         if (I_ADDR >= 18'h4000 && I_ADDR <= 18'h47ff) begin
 127                 //1k
 128                 K_ROM_A <= I_ADDR[10:0];
 129                 DATA_OUT <= K_ROM_D;
 130         end
 131         if (I_ADDR >= 18'h5000 && I_ADDR <= 18'h57ff) begin
 132                 //1h
 133                 H_ROM_A <= I_ADDR[10:0];
 134                 DATA_OUT <= H_ROM_D;
 135         end
 136         if (I_ADDR >= 18'h10000 && I_ADDR <= 18'h3fff) begin
 137                 //sound
 138                 DATA_OUT <= 8'h00;
 139         end
 140 end
 141
 142 assign O_DATA = DATA_OUT;
 143
 144 endmodule