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

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