From b48570ad09f4716c945ce689b9ebf3a9a6879bf7 Mon Sep 17 00:00:00 2001
From: eggy <danielchen04@hotmail.ca>
Date: Fri, 3 Nov 2023 12:43:52 -0400
Subject: [PATCH] ece222: finish datapath

---
 docs/2a/ece222.md | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/docs/2a/ece222.md b/docs/2a/ece222.md
index 95f5d13..b1f108b 100644
--- a/docs/2a/ece222.md
+++ b/docs/2a/ece222.md
@@ -103,5 +103,11 @@ To execute an instruction, the following steps are observed:
   - decode fields like the op-code, offset
   - read recoded registers
 3. Execute (EX)
-  - ALU shenanigans
+  - ALU calculates ADD, SUB, etc, as well as addresses for LDR/STR, sets zero status for CBZ
+  - branch adder calculates any branch target addresses
+4. Memory (ME)
+  - if memory needs to be reached, either `Write` or `Read` must be asserted to prepare for it
+  - write to memory
+5. Writeback (WB)
+  - write results to registers from memory, the ALU, or another register