Basic Registers in Computer Processor

A, special, high speed storage area within the CPU. All data must be represented in a register before it can be processed. For example, if two numbers are to be multiplied, both numbers must be in registers, and the result is also placed in a register. (The register can contain the address of a memory location where data is stored rather than the actual data itself.)
Accumulator
There is a central register in every processor called the accumulator. Traditionally all mathematical and logical operations are performed on the accumulator. The word size of a processor is defined by the width of its accumulator. A 32bit processor has an accumulator of 32 bits.
Pointer, Index, or Base Register
The name varies from manufacturer to manufacturer, but the basic distinguishing property is that it does not hold data but holds the address of data. …