SOLID STATE MEMORY SYSTEM

A storage device that connects to a standard computer system and communicates with a computer system bus, being capable of receiving, storing and retrieving data intended for a magnetic disk drive; the storage device comprising: a main memory; a cache memory; block transfer buffer means to store 512 bytes of data; interface means to receive and store address, data and control information from computer system; look-up table means for storing one physical block address corresponding to each address sent by computer system, and to indicate whether the physical block address is for cache or main memory; additional memory means for storing information on the addresses of cache and also main memory which are unused and suitable for writing to; control means to access a record in look-up table means using address sent by computer system, and to determine a physical block address corresponding to standard address format.