diff --git a/Readme.md b/Readme.md
index 5e938e9..234f74c 100644
--- a/Readme.md
+++ b/Readme.md
@@ -8,6 +8,11 @@ This a demo for llvm build and sim with verilator.
 
 This is a demo of jtag simulation by openocd running on verilator.
 
+
+## install JLink deb software and driver
+
+https://www.segger.com/downloads/jlink/
+
 ## install verilator
 
 `sudo apt install verilator`