1 files changed, 11 insertions, 1 deletions
diff --git a/docs/projects/index.md b/docs/projects/index.md
index ca5c658..400964e 100644
--- a/docs/projects/index.md
+++ b/docs/projects/index.md
@@ -8,7 +8,9 @@ MkDocs). But the few that do, are here.
 
 Projects below are sorted reverse chronologically (most recent first).
 
-## [nand2tetris, Part 1](nand2tetris_1)
+## nand2tetris
+
+### [Part 1](nand2tetris_1)
 
 ![Diagram of a simple computer](img/nand2tetris_1/computer_registers.png)
 
@@ -16,6 +18,14 @@ In July 2022 I enrolled in a course called nand2tetris. In part one of
 this course I built a computer from NAND gates and ran assembly on it. It
 was great fun.
 
+### [Part 2.1](nand2tetris_2.1)
+
+![Diagram of a stack](img/nand2tetris_2.1/stack_before_add.png)
+
+A few days after Part 1 was finished, I entered Part 2. There were so many
+things ahead of me that I decided to split it into multiple blogposts. In
+Part 2.1 I learned about the stack machine and wrote a VM translator.
+
 ## [SIRTET](sirtet)
 
 ![Screenshot of SIRTET mid-game](img/sirtet/sirtet.png)