Add some verilator and isim compatibility
[fpgaboy.git] / System.v
index dc70cc0..cdcee09 100644 (file)
--- a/System.v
+++ b/System.v
@@ -83,7 +83,16 @@ module Switches(
        end
 endmodule
 
+`ifdef isim
+module Dumpable(input [2:0] r, g, input [1:0] b, input hs, vs, vgaclk);
+endmodule
+`endif
+
 module CoreTop(
+`ifdef isim
+       output reg vgaclk = 0,
+       output reg clk = 0,
+`else
        input xtal,
        input [7:0] switches,
        input [3:0] buttons,
@@ -91,16 +100,31 @@ module CoreTop(
        output serio,
        output wire [3:0] digits,
        output wire [7:0] seven,
+`endif
        output wire hs, vs,
        output wire [2:0] r, g,
        output wire [1:0] b,
        output wire soundl, soundr);
+
+`ifdef isim
+       always #62 clk <= ~clk;
+       always #100 vgaclk <= ~vgaclk;
+       
+       Dumpable dump(r,g,b,hs,vs,vgaclk);
        
+       wire [7:0] leds;
+       wire serio;
+       wire [3:0] digits;
+       wire [7:0] seven;
+       wire [7:0] switches = 8'b0;
+       wire [3:0] buttons = 4'b0;
+`else  
        wire xtalb, clk, vgaclk;
        IBUFG iclkbuf(.O(xtalb), .I(xtal));
        CPUDCM dcm (.CLKIN_IN(xtalb), .CLKFX_OUT(clk));
        pixDCM pixdcm (.CLKIN_IN(xtalb), .CLKFX_OUT(vgaclk));
-       
+`endif
+
        wire [15:0] addr;       
        wire [7:0] data;
        wire wr, rd;
@@ -224,8 +248,8 @@ module CoreTop(
                .vblank(vblankirq),
                .lcdc(lcdcirq),
                .tovf(tmrirq),
-               .serial(0),
-               .buttons(0),
+               .serial(1'b0),
+               .buttons(1'b0),
                .master(irq),
                .jaddr(jaddr));
        
@@ -239,6 +263,8 @@ module CoreTop(
                .snd_data_r(soundr));
 endmodule
 
+`ifdef verilator
+`else
 module TestBench();
        reg clk = 1;
        wire [15:0] addr;
@@ -315,3 +341,4 @@ module TestBench();
                .switches(switches),
                .ledout(leds));
 endmodule
+`endif
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