Added description of CLU in Von Neumann Architecture in notes 2025-04…

notes/2025-04-17.md

@@ -222,6 +222,13 @@ switch the circuit to do different things between the numbers so this would get
 
 +++{"lesson_part": "main"}
 
+Component Explanation: CIR (Current Instruction Register):
+- holds the current instruction being executed
+- temporary storage register that updates once the current command is executed and the next one is fetched
+- works with program counter, memory address register and memory data register
+<!-- [source1](https://www.geeksforgeeks.org/computer-organization-von-neumann-architecture/) -->
+<!-- [source2](https://en.wikipedia.org/wiki/Von_Neumann_architecture) -->
+<!-- [source3](https://stackoverflow.com/questions/68090197/what-is-the-purpose-of-the-cir-if-i-have-the-mdr-in-von-neumann-architecture) -->
 what else do we need besides ALU for to have a whole computer
 
 
@@ -414,4 +421,4 @@ Don't forget to logout of seawulf when done
 ```
 [ayman_sandouk@seawulf ~]$ logout
 Connection to seawulf.uri.edu closed.
-```
+```