- added pin non-maskable interrupt (NMI).

Exception vector is reset vector at (X"BFC00000")


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git-svn-id: http://moon:8086/svn/vhdl/trunk@490 cc03376c-175c-47c8-b038-4cd826a8556b

lib/CPUs/MIPS/src/tb_mips_top.vhd

@@ -44,6 +44,7 @@ ARCHITECTURE behavior OF tb_mips_top IS
 	signal debug		: unsigned(1 downto 0);
 
 	-- Master 
+	signal nmi			: STD_LOGIC := '0';
 	signal rst			: STD_LOGIC := '1';
 	signal clk			: STD_LOGIC := '0';
 	signal eb			: STD_LOGIC := '1';
@@ -214,7 +215,8 @@ uut: entity work.mips_top
 		CYC_O	=> CYC_O,
 		STB_O	=> STB_O,
 		MRDY_O	=> MRDY_O,
-		INT		=> INT
+		INT		=> INT,
+		nmi		=> nmi
 	);
 	INT(1)	<= int_uart;
 	INT(5)	<= int_timer;
@@ -430,12 +432,12 @@ STIMULUS: process
 		wait for 3*CLK_PERIOD;
 		wait until rising_edge(clk);
 		rst <= '0';
-		wait for 50000*CLK_PERIOD;
+		wait for 250000*CLK_PERIOD;
 		wait until rising_edge(clk);
-		rst <= '0';
-		wait for 3*CLK_PERIOD;
+		nmi <= '1';
+		wait for 3000*CLK_PERIOD;
 		wait until rising_edge(clk);
-		rst <= '0';
+		nmi <= '0';
 
 		wait;