We need a memory to store control

1
Storing Control

• We need a memory to store control
• This memory has its own address
• Inst memory address can be loaded
• Inst memory address can be incremented

2
Exercising Control

• Control sequences are stored in mmeory
• In each clock cycle, one step is executed
• Sometime the address needs to be modified
• It uses state of the program

3
Condition Code

• ALU generate status bits like
• carry, overflow, sign, and zero
• zero1 means result from ALU is zero
• These bits can be used to change flow of program
• A new address is generated using CCs