24. Organization and Optimization of Microprogrammed controlled Control Unit
This chapter delves into the microprogrammed control unit, emphasizing its structure and operation within computer architecture. It discusses how macro instructions are translated into micro instructions, the importance of efficient microprogramming, and the optimization techniques for control memory. Additionally, the chapter covers the branching mechanisms essential for managing different instruction types effectively.
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What we have learnt
- Microprogramming allows the execution of macro instructions through corresponding micro instructions stored in control memory.
- Optimization techniques, such as branching and shared routines, significantly reduce the size of micro program memory.
- The performance of control units is influenced by the format of control words used in micro program execution.
Key Concepts
- -- Microprogrammed Control Unit
- A control unit in which the control signals are generated by a sequence of instructions called micro instructions.
- -- Branching
- The ability to redirect the flow of execution within a program based on certain conditions, crucial for optimizing microprogram efficiency.
- -- Control Memory
- Memory that stores micro program instructions necessary for generating control signals during instruction execution.
- -- OpCode
- A part of a machine instruction that specifies the operation to be performed.
- -- Control Word Format
- The layout of control signals within a control word, affecting the efficiency of signal management in control units.
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