docs(dn): Simon Hu 2/22/2026 (#480)

Author: 1fHu

src/design_notebooks/2026spring/yh4970.md

@@ -1,5 +1,50 @@
 # Simon Hu - Design Notebook (Spring 2026)
 
+## Week 4
+### Comments:
+Understand the core of verification. 
+One output is from the Verilator, and the other is from the testbench.
+
+### Work done:
+- revised the lab 3 and verified the testbench on exercise 2.
+- terminal respond:
+simonlinux@DESKTOP-8L3L3I6:/mnt/e/NYU/processerVIP/onboarding-lab-3/build$ ./exercise2
+Randomness seeded to: 2048508371
+===============================================================================
+All tests passed (404 assertions in 4 test cases)
+
+
+## Week 3
+### Comments:
+Since in Lab 3 repo lack of header file, I first installed the verilator. Expected install in linux environment.
+Recommend learning Verilator: https://verilator.org/guide/latest/
+
+### Work done:
+- revised the lab 2 and verified the testbench.
+- terminal respond: 
+simonlinux@DESKTOP-8L3L3I6:/mnt/e/NYU/processerVIP/onboarding-lab-2/build$ ./dv/tests
+Randomness seeded to: 2918360953
+===============================================================================
+All tests passed (262654 assertions in 10 test cases)
+
+- onboarding lab 2 link: https://github.com/1fHu/onboarding-lab-2.git
+- finished onboarding lab 3
+
+### Core instructions:
+cd build
+
+cmake ..
+cmake --build .
+./dv/tests
+
+remember to add the testbench file to CMakeLists.txt
+e.g. add_executable(tests
+  exercise1.cpp
+  exercise2.cpp
+  exercise3.cpp
+  exercise4.cpp
+)
+
 ## Week 2
 ### Comments:
 Busy week with conference travel.