Console: Put the core in its own clock domain.

[firearm.git] / xst / Console.v

diff --git a/xst/Console.v b/xst/Console.v
index 5f5e2dadf6e6d113b6687757dbe804cff454a01a..94e1010ac77d153981a6e237a9d27b0060c1e6ef 100644 (file)
--- a/xst/Console.v
+++ b/xst/Console.v
@@ -57,17 +57,21 @@ module Console(
        
        assign dvi_reset_b = 1'b1;
        
-       wire clk25, clk25_90;
+       wire pixclk, pixclk_90, coreclk, coreclk_90;
 
        wire [11:0] x, y;
        wire border;
 
-       MulDivDCM dcm25(xtal, clk25, clk25_90);
-       defparam dcm25.div = 16;
-       defparam dcm25.mul = 5;
+       MulDivDCM dcm31_25(xtal, pixclk, pixclk_90);
+       defparam dcm31_25.div = 16;
+       defparam dcm31_25.mul = 5;
+       
+       MulDivDCM dcmcore(xtal, coreclk, coreclk_90);   /* 50MHz */
+       defparam dcmcore.div = 2;
+       defparam dcmcore.mul = 1;
        
        wire vs, hs;
-       SyncGen sync(clk25, vs, hs, x, y, border);
+       SyncGen sync(pixclk, vs, hs, x, y, border);
        
        wire [7:0] cschar;
        wire [2:0] csrow;
@@ -88,7 +92,7 @@ module Console(
        wire [4:0] vcursy;
        
        reg [16:0] rsttimer = 17'h3FFFF;
-       always @(posedge clk25)
+       always @(posedge coreclk)
                if (~rst)
                        rsttimer <= 17'h3FFFF;
                else if (rsttimer)
@@ -102,13 +106,13 @@ module Console(
        wire [7:0] sertxdata;
        
        CharSet cs(cschar, csrow, csdata);
-       VideoRAM vram(clk25, vraddr + vscroll, vrdata, clk25, vwaddr, vwdata, vwr);
-       VDisplay dpy(clk25, x, y, vraddr, vrdata, cschar, csrow, csdata, vcursx, vcursy, odata);
-       RXState rxsm(clk25, vwr, vwaddr, vwdata, vscroll, vcursx, vcursy, serwr, serdata);
-       PS2 ps2(clk25, ps2c, ps2d, sertxwr, sertxdata);
-       System sys(.clk(clk25), .rst(rstact), .sys_odata({serwr, serdata}), .sys_idata({ps2_hasd, ps2_d}), .sys_tookdata(tookdata));
+       VideoRAM vram(pixclk, vraddr + vscroll, vrdata, coreclk, vwaddr, vwdata, vwr);
+       VDisplay dpy(pixclk, x, y, vraddr, vrdata, cschar, csrow, csdata, vcursx, vcursy, odata);
+       RXState rxsm(coreclk, vwr, vwaddr, vwdata, vscroll, vcursx, vcursy, serwr, serdata);
+       PS2 ps2(coreclk, ps2c, ps2d, sertxwr, sertxdata);
+       System sys(.clk(coreclk), .rst(rstact), .sys_odata({serwr, serdata}), .sys_idata({ps2_hasd, ps2_d}), .sys_tookdata(tookdata));
        
-       always @(posedge clk25)
+       always @(posedge coreclk)
                if (sertxwr)
                        {ps2_hasd, ps2_d} <= {1'b1, sertxdata};
                else if (tookdata)
@@ -116,8 +120,8 @@ module Console(
        
        /* FUCK! ASS! BALLS! EAT MY SHORT DICK! FUCKING XST */
        /* EMSD stands for Eat My Short Dick.  Because XST should. */
-`define MAKE_DDR(n,q,d1,d2) ODDR n (.C(clk25), .Q(q), .D1(d1), .D2(d2), .R(0), .S(0), .CE(1))
-`define MAKE_DDR90(n,q,d1,d2) ODDR n (.C(clk25_90), .Q(q), .D1(d1), .D2(d2), .R(0), .S(0), .CE(1))
+`define MAKE_DDR(n,q,d1,d2) ODDR n (.C(pixclk), .Q(q), .D1(d1), .D2(d2), .R(0), .S(0), .CE(1))
+`define MAKE_DDR90(n,q,d1,d2) ODDR n (.C(pixclk_90), .Q(q), .D1(d1), .D2(d2), .R(0), .S(0), .CE(1))
        
        wire [7:0] red, green, blue;
        assign red   = (odata ? 8'hFF : 0) | (x[8:2] ^ y[7:1]);
@@ -143,7 +147,7 @@ module Console(
        `MAKE_DDR(EMSD_dvi_d_11, dvi_d[11], green[3], red[7]);
        
        wire wee;
-       iic_init #(.CLK_RATE_MHZ(31)) init (clk25, 1'b1, 1'b0, dvi_sda, dvi_scl, wee);
+       iic_init #(.CLK_RATE_MHZ(31)) init (pixclk, 1'b1, 1'b0, dvi_sda, dvi_scl, wee);
 
 endmodule