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Systems I: Computer Organization and Architecture. Lecture 10: Microprogrammed Control. Microprogramming. The control unit is responsible for initiating the sequence of microoperations that comprise instructions. When these control signals are generated by hardware, the control unit is hardwired.
Micro-Operations. Execution of an instruction (the instruction cycle) has a number of smaller units. —Fetch, indirect, execute, interrupt, etc. Each part of the cycle has a number of smaller steps called micro-operations. —Discussed extensive in pipelining.
The Central Processing Unit (CPU) in a microcomputer system is typically a micro-processor unit (MPU) or core. The CPU is where instructions become signals and hardware actions that command the microcomputer operation. The minimal list of components that define the architecture of a CPU include the following: • Hardware Components:
The internal hardware organization of a digital computer is best defined by specifying: 1. The set of registers it contains and their function. 2. The sequence of microoperations performed on the binary information stored in the registers. 3. The control that initiates the sequence of microoperations. REGISTER TRANSFER LANGUAGE:
The hardware organization of a digital computer is best defined by specifying: The set of register that it contains and their function. The sequence of microoperations performed on the binary information stored in the registers. The control signals that initiates the sequence of microoperations.
Principles of Operation defines computer architecture which includes: • instruction set • instruction format • operation codes • addressing modes • all registers and memor locations that may be directly manipulated or tested by a machine language program • formats for data representation Machine Implementation was defined as the actual syste...
Microoperations. The instructions are stored in computer memory in the same manner that data is stored. The control unit interprets these instructions and uses the operations code to determine the sequences of microoperations that must be performed to execute the instruction.
