diff --git a/hw/fpga/super6502.qsf b/hw/fpga/super6502.qsf
index 496716f..258c17c 100644
--- a/hw/fpga/super6502.qsf
+++ b/hw/fpga/super6502.qsf
@@ -101,7 +101,6 @@ set_location_assignment PIN_A13 -to SW[6]
 set_location_assignment PIN_A14 -to SW[7]
 set_location_assignment PIN_B14 -to SW[8]
 set_location_assignment PIN_F15 -to SW[9]
-set_location_assignment PIN_A7 -to Run
 set_location_assignment PIN_A8 -to LED[0]
 set_location_assignment PIN_A9 -to LED[1]
 set_location_assignment PIN_A10 -to LED[2]
@@ -272,7 +271,6 @@ set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to SW[6]
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to SW[7]
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to SW[8]
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to SW[9]
-set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to Run
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to LED[0]
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to LED[1]
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to LED[2]
@@ -283,4 +281,6 @@ set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to LED[6]
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to LED[7]
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to LED[8]
 set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to LED[9]
+set_location_assignment PIN_A7 -to button_1
+set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to button_1
 set_instance_assignment -name PARTITION_HIERARCHY root_partition -to | -section_id Top
\ No newline at end of file
diff --git a/hw/fpga/super6502.sv b/hw/fpga/super6502.sv
index 54bcf61..37f7178 100644
--- a/hw/fpga/super6502.sv
+++ b/hw/fpga/super6502.sv
@@ -2,6 +2,7 @@
 module super6502(
     input                   clk_50,
     input   logic           rst_n,
+    input   logic           button_1,
     
     input   logic [15:0]    cpu_addr,
     inout   logic [7:0]     cpu_data,
@@ -61,7 +62,7 @@ assign cpu_sob = '0;
 assign cpu_resb = rst_n;
 assign cpu_be = '1;
 assign cpu_nmib = '1;
-assign cpu_irqb = '1;
+assign cpu_irqb = button_1;
 
 addr_decode decode(
     .addr(cpu_addr),