module galaxian_roms( I_ROM_CLK, I_ADDR, O_DATA ); input I_ROM_CLK; input [18:0]I_ADDR; output [7:0]O_DATA; //CPU-Roms wire [7:0]U_ROM_D; GALAXIAN_U U_ROM( .CLK(I_ROM_CLK), .ADDR(I_ADDR[10:0]), .DATA(U_ROM_D), .ENA(1'b1) ); wire [7:0]V_ROM_D; GALAXIAN_V V_ROM( .CLK(I_ROM_CLK), .ADDR(I_ADDR[10:0]), .DATA(V_ROM_D), .ENA(1'b1) ); wire [7:0]W_ROM_D; GALAXIAN_W W_ROM( .CLK(I_ROM_CLK), .ADDR(I_ADDR[10:0]), .DATA(W_ROM_D), .ENA(1'b1) ); wire [7:0]Y_ROM_D; GALAXIAN_Y Y_ROM( .CLK(I_ROM_CLK), .ADDR(I_ADDR[10:0]), .DATA(Y_ROM_D), .ENA(1'b1) ); //7L CPU-Rom wire [7:0]L_ROM_D; GALAXIAN_7L L_ROM( .CLK(I_ROM_CLK), .ADDR(I_ADDR[10:0]), .DATA(L_ROM_D), .ENA(1'b1) ); reg [7:0]DATA_OUT; // address map //-------------------------------------------------- // 0x00000 - 0x007FF galmidw.u CPU-ROM // 0x00800 - 0x00FFF galmidw.v CPU-ROM // 0x01000 - 0x017FF galmidw.w CPU-ROM // 0x01800 - 0x01FFF galmidw.y CPU-ROM // 0x02000 - 0x027FF 7l CPU-ROM // 0x04000 - 0x047FF 1k.bin VID-ROM // 0x05000 - 0x057FF 1h.bin VID-ROM // 0x10000 - 0x3FFFF mc_wav_2.bin Sound(Wav)Data always@(posedge I_ROM_CLK) begin if (I_ADDR <= 18'h7ff) begin //u DATA_OUT <= U_ROM_D; end else if (I_ADDR >= 18'h800 && I_ADDR <= 18'hfff) begin //v DATA_OUT <= V_ROM_D; end else if (I_ADDR >= 18'h1000 && I_ADDR <= 18'h17ff) begin //w DATA_OUT <= W_ROM_D; end else if (I_ADDR >= 18'h1800 && I_ADDR <= 18'h1fff) begin //y DATA_OUT <= Y_ROM_D; end else if (I_ADDR >= 18'h2000 && I_ADDR <= 18'h27ff) begin //7l DATA_OUT <= L_ROM_D; end else begin DATA_OUT <= DATA_OUT; end end assign O_DATA = DATA_OUT; endmodule