The Multics virtual memory

摘要: As experience with use of on-line operating systems has grown, the need to share information among system users become increasingly apparent. Many contemporary permit some degree sharing. Usually, sharing is accomplished by allowing several data via input and output stored in files kept secondary storage. Through segmentation, however, Multics provides direct hardware addressing user programs all information, independent its physical storage location. Information segments each which potentially sharable carries own attributes size access privilege.Here, design implementation considerations segmentation are first discussed under assumption that resides a large, segmented main memory. Since memory on rather limited, it then shown how software achieves effect large through Honeywell 645 paging hardware.