docs(dn): Simon Hu 10/5/25 (#400)

Author: 1fHu

src/design_notebooks/2025fall/yh4970.md

@@ -1,5 +1,13 @@
 # Simon Hu - Design Notebook (Fall 2025)
 
+
+## Week 4
+- Test register file
+
+## Week 3 
+- Test Risc 16 Program Counter
+- Build ALU model with teammate
+
 ## Week 2 (Sep 15- Sep 21)
 - Read Risc 16 datasheet
 - Understood Program counter