X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/9c834ff2149ba2b9b4db71a1bb6b974235c88273..179b434745a7b2da871d69c201dd1bda3e445f41:/System.v

diff --git a/System.v b/System.v
index 5d4fbed..00ee4ec 100644
--- a/System.v
+++ b/System.v
@@ -26,7 +26,6 @@ module InternalRAM(
 	
 	wire decode = address[15:13] == 3'b110;
 	reg [7:0] odata;
-	wire idata = data;
 	assign data = (rd && decode) ? odata : 8'bzzzzzzzz;
 	
 	always @(negedge clk)
@@ -72,6 +71,10 @@ module CoreTop(
 	
 	wire clk;	
 	CPUDCM dcm (.CLKIN_IN(xtal), .CLKFX_OUT(clk));
+	
+	wire cclk;
+//	IBUFG ibuf (.O(cclk), .I(switches[0] & clk));
+	assign cclk = clk;
 
 	wire [15:0] addr;	
 	wire [7:0] data;
@@ -79,7 +82,8 @@ module CoreTop(
 	
 	wire irq, tmrirq;
 	wire [7:0] jaddr;
-
+	wire [1:0] state;
+	
 	GBZ80Core core(
 		.clk(clk),
 		.busaddress(addr),
@@ -87,7 +91,8 @@ module CoreTop(
 		.buswr(wr),
 		.busrd(rd),
 		.irq(irq),
-		.jaddr(jaddr));
+		.jaddr(jaddr),
+		.state(state));
 	
 	ROM rom(
 		.address(addr),
@@ -97,12 +102,16 @@ module CoreTop(
 		.rd(rd));
 	
 	AddrMon amon(
-    .addr(addr), 
-    .clk(clk), 
-    .digit(digits), 
-    .out(seven),
-	 .freeze(buttons[0])
-    );
+		.addr(addr), 
+		.clk(clk), 
+		.digit(digits), 
+		.out(seven),
+		.freeze(buttons[0]),
+		.periods(
+			(state == 2'b00) ? 4'b0010 :
+			(state == 2'b01) ? 4'b0001 :
+			(state == 2'b10) ? 4'b1000 :
+			                   4'b0100) );
 	 
 	Switches sw(
 		.address(addr),
@@ -111,24 +120,25 @@ module CoreTop(
 		.wr(wr),
 		.rd(rd),
 		.ledout(leds),
-		.switches(switches)
+		.switches({switches[7:1],1'b0})
 		);
 
 	UART nouart (	/* no u */
-    .clk(clk), 
-    .wr(wr), 
-    .rd(rd), 
-    .addr(addr), 
-    .data(data), 
-    .serial(serio)
-    );
+		.clk(clk), 
+		.wr(wr), 
+		.rd(rd), 
+		.addr(addr), 
+		.data(data), 
+		.serial(serio)
+		);
 
-  InternalRAM ram(
+	InternalRAM ram(
 		.address(addr),
 		.data(data),
 		.clk(clk),
 		.wr(wr),
-		.rd(rd));
+		.rd(rd)
+		);
 
 	Timer tmr(
 		.clk(clk),
@@ -136,7 +146,8 @@ module CoreTop(
 		.rd(rd),
 		.addr(addr),
 		.data(data),
-		.irq(tmrirq));
+		.irq(tmrirq)
+		);
 	
 	Interrupt intr(
 		.clk(clk),
@@ -165,7 +176,7 @@ module TestBench();
 	wire [7:0] leds;
 	wire [7:0] switches;
 	
-	always #10 clk <= ~clk;
+	always #62 clk <= ~clk;
 	GBZ80Core core(
 		.clk(clk),
 		.busaddress(addr),