Consider static-RAM cache memory for 32-bit micro-computer design

High speed static RAM cache provides high performance at reasonable cost for 32-bit microprocessors with large dynamic-RAM arrays. A cache is a fast memory, small relative to the main memory, which provides access times compatible with the speed of the CPU. It serves as a buffer between the CPU and the main memory. There are several approaches varying by degree of associativity. A direct-mapped cache has a set associativity of one. A set associative cache allows two or more potential entries for each cache location. In a fully associative cache contents of any main memory location can be stored at any cache location. The direct-mapped is less expensive than associative, although for a given size, the associative is faster.