diff --git a/opene906/demo/sim/sim.s b/opene906/demo/sim/sim.s
index 74b884b..ef0b4dc 100644
--- a/opene906/demo/sim/sim.s
+++ b/opene906/demo/sim/sim.s
@@ -1,11 +1,31 @@
+/*Copyright 2020-2021 T-Head Semiconductor Co., Ltd.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
 .global main
 
 main:
 
-# csrsi mstatus, 0x8
-# csrci mhcr, 0x1
-# csrci mhcr, 0x2
+csrsi mstatus, 0x8
+csrci 0x7C1, 0x1  # csrci mhcr, 0x1
+csrci 0x7C1, 0x2  # csrci mhcr, 0x2
 
 loop:
+ addi x2, x2, 1
+ addi x3, x3, 1
+ addi x4, x4, 1
+ addi x5, x5, 1
+ addi x6, x6, 1
+ addi x7, x7, 1
+ addi x8, x8, 1
  j loop
-
diff --git a/opene906/demo/sim/work/.gitignore b/opene906/demo/sim/work/.gitignore
index b86ad13..c300060 100644
--- a/opene906/demo/sim/work/.gitignore
+++ b/opene906/demo/sim/work/.gitignore
@@ -2,4 +2,5 @@
 *.pat
 *.obj
 *.hex
-*.elf
\ No newline at end of file
+*.elf
+*.dis
\ No newline at end of file
diff --git a/opene906/demo/sim/work/E906_DEBUG_PATTERN.s b/opene906/demo/sim/work/E906_DEBUG_PATTERN.s
index a29bf88..cbcbb52 100644
--- a/opene906/demo/sim/work/E906_DEBUG_PATTERN.s
+++ b/opene906/demo/sim/work/E906_DEBUG_PATTERN.s
@@ -21,5 +21,12 @@ csrci 0x7C1, 0x1  # csrci mhcr, 0x1
 csrci 0x7C1, 0x2  # csrci mhcr, 0x2
 
 loop:
+ addi x2, x2, 1
+ addi x3, x3, 1
+ addi x4, x4, 1
+ addi x5, x5, 1
+ addi x6, x6, 1
+ addi x7, x7, 1
+ addi x8, x8, 1
  j loop
 
diff --git a/opene906/demo/sim/work/Makefile b/opene906/demo/sim/work/Makefile
index 87d7264..6d54d32 100644
--- a/opene906/demo/sim/work/Makefile
+++ b/opene906/demo/sim/work/Makefile
@@ -83,6 +83,9 @@ ${FILE}.hex : ${FILE}.elf
 	${OBJCOPY} ${HEXFLAGS} $< ${DATA_HEX} -j .data*  -j .bss -j .COMMON
 	${OBJCOPY} ${HEXFLAGS} $< $@ 
 
+${FILE}.dis : ${FILE}.elf
+	${OBJDUMP} -S $< > ${FILE}.dis
+
 INST_PAT = inst.pat
 DATA_PAT = data.pat
 FILE_PAT = case.pat
@@ -93,15 +96,14 @@ FILE_PAT = case.pat
 	${CONVERT} ${DATA_HEX} ${DATA_PAT}
 	${CONVERT} ${FILE_HEX} ${FILE_PAT}
 
-
 #--------------------------------------------------------------------
 # target setting
 .PHONY :all
-all : ${FILE}.pat ${FILE}.hex ${FILE}.elf ${FILE}.obj
+all :  clean ${FILE}.pat ${FILE}.hex ${FILE}.elf ${FILE}.obj ${FILE}.dis
 
 #---------------------------------------------------------------------
 # clean some medium code and .pat
 .PHONY :clean 
 clean:
-	rm -rf *.o *.pat  *.obj *.hex
+	rm -rf *.o *.pat  *.obj *.hex *.dis