External information storage system with a semiconductor memory

摘要: To provide an external storage system using a semiconductor memory in which the data reading and writing between host CPU can be processed faster than conventional magnetic disk, only particular sector is not frequently written erased so that whole effectively used over long period of time. An address control scheme was introduced flexibility given to relation physical one-sidedly determined by logical possessed command CPU. Command processing section 34 always prepares blocks sectors for or erasing copying preparation CPU, records holds correspondence selected block 32i conversion table 36. The status recorded respective managing tables 35 60, processings such as writing, response