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Register Address

The address of a register, which is a small memory location directly on the CPU. When the CPU needs information from one of those registers to complete an operation, it can simply use the register address (for example, “register one”) to access the information.


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An addressing scheme that uses a value stored in one of the CPU’s registers as the base location from which to begin counting. The CPU then adds the offset supplied with the instruction to that base address and retrieves the operand from the computed memory location.
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The memory address that is supplied to the CPU as part of the instruction and doesn’t contain the actual value that the CPU is to use as an operand.
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The part of a computer that performs the logic, computation, and decisionmaking functions. It interprets and executes instructions as it receives them. PCs have one CPU, typically a single chip.
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A limited amount of onboard memory in a CPU.
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