X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/5bac4cf0a60acac6826eb3215e1526d48ba8f7ac..6c46357c6f1bfeefc3a9f85aed03f94e923d09f1:/System.v

diff --git a/System.v b/System.v
index 0afc090..4081771 100644
--- a/System.v
+++ b/System.v
@@ -71,6 +71,9 @@ module CoreTop(
 	
 	wire clk;	
 	CPUDCM dcm (.CLKIN_IN(xtal), .CLKFX_OUT(clk));
+	
+	wire cclk;
+	IBUFG ibuf (.O(cclk), .I(switches[0]));
 
 	wire [15:0] addr;	
 	wire [7:0] data;
@@ -78,15 +81,17 @@ module CoreTop(
 	
 	wire irq, tmrirq;
 	wire [7:0] jaddr;
+	wire [1:0] state;
 
 	GBZ80Core core(
-		.clk(clk),
+		.clk(cclk),
 		.busaddress(addr),
 		.busdata(data),
 		.buswr(wr),
 		.busrd(rd),
 		.irq(irq),
-		.jaddr(jaddr));
+		.jaddr(jaddr),
+		.state(state));
 	
 	ROM rom(
 		.address(addr),
@@ -100,7 +105,12 @@ module CoreTop(
 		.clk(clk), 
 		.digit(digits), 
 		.out(seven),
-		.freeze(buttons[0]));
+		.freeze(buttons[0]),
+		.periods(
+			(state == 2'b00) ? 4'b1000 :
+			(state == 2'b01) ? 4'b0100 :
+			(state == 2'b10) ? 4'b0010 :
+			                   4'b0001) );
 	 
 	Switches sw(
 		.address(addr),
@@ -109,7 +119,7 @@ module CoreTop(
 		.wr(wr),
 		.rd(rd),
 		.ledout(leds),
-		.switches(switches)
+		.switches({switches[7:1],1'b0})
 		);
 
 	UART nouart (	/* no u */