diff --git a/driver/opae/vortex.cpp b/driver/opae/vortex.cpp
index e66b9afe..901efffe 100755
--- a/driver/opae/vortex.cpp
+++ b/driver/opae/vortex.cpp
@@ -491,6 +491,12 @@ extern int vx_start(vx_device_h hdevice) {
     // start execution    
     CHECK_RES(fpgaWriteMMIO64(device->fpga, 0, MMIO_CMD_TYPE, CMD_RUN));
 
+#ifdef SCOPE
+    sleep(15);
+    vx_scope_stop(device->fpga, 0);
+    exit(0);
+#endif
+
     return 0;
 }
 
diff --git a/hw/opae/README b/hw/opae/README
index 611adec4..82fde3df 100644
--- a/hw/opae/README
+++ b/hw/opae/README
@@ -79,6 +79,7 @@ tar -zcvf trace.vcd.tar.gz obj_dir/trace.vcd
 tar -zcvf trace.vcd.tar.gz trace.vcd
 tar -zcvf run.log.tar.gz run.log
 tar -cvjf vortex.vcd.tar.bz2 build_ase_1c/work/vortex.vcd
+tar -zcvf vortex.vcd.tar.gz build_ase_1c/work/vortex.vcd
 
 # decompress VCD trace
 tar -zxvf /mnt/c/Users/Blaise/Downloads/vortex.vcd.tar.gz
@@ -104,6 +105,5 @@ make -C top clean && make -C top > top/build.log 2>&1 &
 200  Mhz -> period = 1/200x10^6 = 5ns 
 if slack = +1.664 -> minimal period = 5-1.664 = 3.336 -> fmax = 1/3.336 = 300 Mhz
 
-
 # build rtlsim from driver tests
 make -C ../../rtlsim clean && reset && make -C ../../rtlsim
\ No newline at end of file
diff --git a/hw/rtl/fp_cores/VX_fp_nmadd.v b/hw/rtl/fp_cores/VX_fp_nmadd.v
index 95350bc2..905ff954 100644
--- a/hw/rtl/fp_cores/VX_fp_nmadd.v
+++ b/hw/rtl/fp_cores/VX_fp_nmadd.v
@@ -93,7 +93,7 @@ module VX_fp_nmadd #(
             .ay(datab[i]),
             .az(dataa[i]),
             .clk({2'b00,clk}),
-            .ena({2'b11,enable0}),
+            .ena({2'b11,enable}),
             .aclr(2'b00),
             .chainin(),
             // outputs
@@ -133,7 +133,7 @@ module VX_fp_nmadd #(
             .ay(result_st0),
             .az(),
             .clk({2'b00,clk}),
-            .ena({2'b11,enable1}),
+            .ena({2'b11,enable}),
             .aclr(2'b00),
             .chainin(),
             // outputs