Computer Structure

Read Operation
1. CU Set up MAR with the address to be accessed
2. Control unit activates the Read Line
3. Storage location info. are released onto the Databus
4. Copy is transferred into the MDR

(MAR - Memory Address Register, MDR - Memory Data Register)
The Fetch Execute Cycle (Get it, Dae it!) is an important process in the computer system
a. Fill in the missing steps

1. __________________________________________________
2. Control Unit Activates the read line
3. contents are ________________________________________
4. copy of the information ________________________________
5. instruction is decoded and ______________________________


1. SAME AS READ STEP 1
3. SAME AS READ STEP 3
4. SAME AS READ STEP 4
5. EXECUTED!


Write Operation
1. CU sets up MAR with the address to be accessed
2. CU sets up MDR with data to be written
3. CU activates the write line
4. Data is transferred to mem. location via the Data Bus.