diff --git a/projects/mips_sys/src/mips_sys.vhd b/projects/mips_sys/src/mips_sys.vhd
index bb62c78..d9a5ce3 100644
--- a/projects/mips_sys/src/mips_sys.vhd
+++ b/projects/mips_sys/src/mips_sys.vhd
@@ -333,7 +333,7 @@ ARCHITECTURE behavior OF mips_sys IS
 	signal int_uart1			: std_logic;
 	signal uart1_tx				: std_logic;
 	signal uart1_rx				: std_logic;
-	signal usb_addr 			: unsigned(31 downto 0);
+	signal usb_addr 			: unsigned(3 downto 0);
 	signal ac97_rstn			: std_logic;
 	signal mem_mapped_io		: std_logic;
 	signal flash_rstn			: std_logic;
@@ -491,10 +491,10 @@ BEGIN
 	sys_led					<= gpo0(8 downto 0);
 	sys_error				<= debug;
 	nmi						<= not sys_rst_n_in;
-	rst_in 					<= not sys_rst_n_in and sys_btn(0) and sys_btn(2);
+	rst_in 					<= not sys_rst_n_in and sys_btn(0);
 	sys_usb_rstn			<= not gpo1(0);
 	sys_flash_byten			<= '1';
-	usb_addr				<= X"0000000" & "00" & ADDR_O(3 downto 2);
+	sys_usb_a				<= usb_Addr(3 downto 2);
 	sys_flash_a				<= '0' & flash_addr(24 downto 2) & '0';
 	flash_page_mode_en		<= not mem_mapped_io;
 
@@ -778,7 +778,7 @@ inst_flash_port : async_port_wb
 inst_usb_port : async_port_wb
 	GENERIC MAP
 	(
-		addr_width		=> 2,
+		addr_width		=> 4,
 		data_width		=> 16,
 		byte_sel_width	=> 1,
 		async_timespec	=> ts_usb
@@ -794,11 +794,11 @@ inst_usb_port : async_port_wb
 		SRDY_O			=> SRDY_O_usb,
 		MRDY_I			=> MRDY_O,
 		SEL_I			=> SEL_O,
-		ADDR_I			=> usb_addr,
+		ADDR_I			=> ADDR_O,
 		DAT_I			=> MDAT_O,
 		DAT_O			=> SDAT_O_usb,
 		page_mode_en	=> '0',
-		async_a			=> sys_usb_a,
+		async_a			=> usb_addr,
 		async_d			=> sys_usb_d,
 		async_cs		=> sys_usb_csn,
 		async_wr		=> sys_usb_wrn,