From "Multics—The first seven years" by F. J. Corbató, J. H. Saltzer, and C. T. Clingen in the Proceedings of the Spring Joint Computer Conference, 1972, AFIPS. Page 578:Page 574-5: Program execution environment Another set of interfaces is embodied in the implementation environment seen by PL/I programmers. This environment consists of a directly addressable virtual memory containing the entire hierarchy of online information, a dynamic linking facility which searches this hierarchy to bind procedure references, a device-independent input/output[16] system,* and program debugging and metering facilities. ---------------------- * The Michigan Terminal System[17] has a similar device-independent input/output system. By now it has become accepted lore in the computer system field that the use of automatic management algorithms for memory systems constructed of several levels with different access times can provide a significant reduction of user programming effort. Examples of such automatic management strategies include the buffer memories of the IBM system 370 models 155, 165, and 195[25] and the demand paging virtual memories of Multics, IBM's CP-67[26] and the Michigan Terminal System.[17] [17] M T ALEXANDER Organization and features of the Michigan terminal system AFIPS Conf Proc 40 1972 SJCC AFIPS Press (This volume) |
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