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- Multi-Environment_Real-Time abstract "Multi-Environment Real-Time (MERT) was a hybrid time-sharing/real-time operating system developed in the 1970s at Bell Labs for use in embedded minicomputers (in particular PDP-11s). It was later renamed UNIX Real-Time (UNIX-RT). A version called Duplex Multi Environment Real Time (DMERT) was the operating system for the AT&T 3B20D telephone switching minicomputer, designed for high availability;DMERT was later renamed Unix RTR (Real-Time Reliable).A \"generalization\" of Bell Labs' time-sharing operating system Unix,MERT featured a redesigned, modular kernel that was able to run Unix programs as well as privileged real-time processes. These processes' data structures were isolated from other processes, with message passing being the preferred form of interprocess communication (IPC), although shared memory was also implemented. MERT also sported a custom filesystem with special support for large, contiguous, statically sized files, as used in real-time database applications. The design of MERT was influenced by Dijkstra's THE, Hansen's Monitor and IBM's CP-67.The MERT operating system was a four-layer design, in increasing order of protection: Kernel: resource allocation of memory, CPU time and interrupts; kernel-mode processes including I/O device drivers, file manager, swap manager, \"root process\" that connects the file manager to the disk (usually combined with the swap manager); operating system supervisor; user processes.The standard supervisor was MERT/UNIX, a Unix emulator with an extended system call interface and shell that enabled the use of MERT's custom IPC mechanisms, although an RSX-11 emulator also existed.".
- Multi-Environment_Real-Time developer Bell_Labs.
- Multi-Environment_Real-Time wikiPageID "1364232".
- Multi-Environment_Real-Time wikiPageLength "5624".
- Multi-Environment_Real-Time wikiPageOutDegree "33".
- Multi-Environment_Real-Time wikiPageRevisionID "678353630".
- Multi-Environment_Real-Time wikiPageWikiLink 3B_series_computers.
- Multi-Environment_Real-Time wikiPageWikiLink Bell_Labs.
- Multi-Environment_Real-Time wikiPageWikiLink CP-67.
- Multi-Environment_Real-Time wikiPageWikiLink C_(programming_language).
- Multi-Environment_Real-Time wikiPageWikiLink Category:Bell_Labs_Unices.
- Multi-Environment_Real-Time wikiPageWikiLink Category:Real-time_operating_systems.
- Multi-Environment_Real-Time wikiPageWikiLink Database.
- Multi-Environment_Real-Time wikiPageWikiLink Device_driver.
- Multi-Environment_Real-Time wikiPageWikiLink Embedded_system.
- Multi-Environment_Real-Time wikiPageWikiLink High_availability.
- Multi-Environment_Real-Time wikiPageWikiLink Inter-process_communication.
- Multi-Environment_Real-Time wikiPageWikiLink Interrupt.
- Multi-Environment_Real-Time wikiPageWikiLink Kernel_(operating_system).
- Multi-Environment_Real-Time wikiPageWikiLink Message_passing.
- Multi-Environment_Real-Time wikiPageWikiLink Microkernel.
- Multi-Environment_Real-Time wikiPageWikiLink Minicomputer.
- Multi-Environment_Real-Time wikiPageWikiLink PDP-11.
- Multi-Environment_Real-Time wikiPageWikiLink Paging.
- Multi-Environment_Real-Time wikiPageWikiLink Protection_ring.
- Multi-Environment_Real-Time wikiPageWikiLink RC_4000_multiprogramming_system.
- Multi-Environment_Real-Time wikiPageWikiLink RSX-11.
- Multi-Environment_Real-Time wikiPageWikiLink Real-time_computing.
- Multi-Environment_Real-Time wikiPageWikiLink Real-time_operating_system.
- Multi-Environment_Real-Time wikiPageWikiLink Shared_memory.
- Multi-Environment_Real-Time wikiPageWikiLink System_call.
- Multi-Environment_Real-Time wikiPageWikiLink THE_multiprogramming_system.
- Multi-Environment_Real-Time wikiPageWikiLink Telephone_exchange.
- Multi-Environment_Real-Time wikiPageWikiLink Time-sharing.
- Multi-Environment_Real-Time wikiPageWikiLink Unix.
- Multi-Environment_Real-Time wikiPageWikiLink Unix_shell.
- Multi-Environment_Real-Time wikiPageWikiLinkText "MERT".
- Multi-Environment_Real-Time wikiPageWikiLinkText "Multi-Environment Real-Time".
- Multi-Environment_Real-Time developer Bell_Labs.
- Multi-Environment_Real-Time family "Real-time operating systems".
- Multi-Environment_Real-Time kernelType Microkernel.
- Multi-Environment_Real-Time marketingTarget "Real-time computing applications".
- Multi-Environment_Real-Time name "Multi-Environment Real-Time".
- Multi-Environment_Real-Time programmedIn C_(programming_language).
- Multi-Environment_Real-Time supportedPlatforms PDP-11.
- Multi-Environment_Real-Time wikiPageUsesTemplate Template:Bell_Unix.
- Multi-Environment_Real-Time wikiPageUsesTemplate Template:Distinguish.
- Multi-Environment_Real-Time wikiPageUsesTemplate Template:Infobox_OS.
- Multi-Environment_Real-Time wikiPageUsesTemplate Template:Operating-system-stub.
- Multi-Environment_Real-Time wikiPageUsesTemplate Template:Real-time_operating_systems.
- Multi-Environment_Real-Time wikiPageUsesTemplate Template:Reflist.
- Multi-Environment_Real-Time subject Category:Bell_Labs_Unices.
- Multi-Environment_Real-Time subject Category:Real-time_operating_systems.
- Multi-Environment_Real-Time hypernym System.
- Multi-Environment_Real-Time type Software.
- Multi-Environment_Real-Time type Work.
- Multi-Environment_Real-Time type Variant.
- Multi-Environment_Real-Time type CreativeWork.
- Multi-Environment_Real-Time type Thing.
- Multi-Environment_Real-Time type Q386724.
- Multi-Environment_Real-Time type Q7397.
- Multi-Environment_Real-Time comment "Multi-Environment Real-Time (MERT) was a hybrid time-sharing/real-time operating system developed in the 1970s at Bell Labs for use in embedded minicomputers (in particular PDP-11s). It was later renamed UNIX Real-Time (UNIX-RT).".
- Multi-Environment_Real-Time label "Multi-Environment Real-Time".
- Multi-Environment_Real-Time differentFrom Penn_MERT.
- Multi-Environment_Real-Time sameAs Q6934384.
- Multi-Environment_Real-Time sameAs RT.
- Multi-Environment_Real-Time sameAs m.04wxx7.
- Multi-Environment_Real-Time sameAs Q6934384.
- Multi-Environment_Real-Time wasDerivedFrom Multi-Environment_Real-Time?oldid=678353630.
- Multi-Environment_Real-Time isPrimaryTopicOf Multi-Environment_Real-Time.
- Multi-Environment_Real-Time name "Multi-Environment Real-Time".