Multi-Environment Real-Time
Multi-Environment Real-Time (MERT), later renamed UNIX Real-Time (UNIX-RT), is a hybrid time-sharing and real-time operating system developed in the 1970s at Bell Labs for use in embedded minicomputers (especially PDP-11s). A version named 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). The MERT operating system was a four-layer design, in decreasing order of protection:
3B series computers5ESS Switching SystemAT&T Computer SystemsBourne shellComparison of real-time operating systemsDMERTMERTMERT (operating system)MERT operating systemMach (kernel)MertMicrokernelNo. 4 Electronic Switching SystemPDP-11RTLinuxRTRResearch UnixUNIX-RTRUNIX System IIIUnix RTRVersion 6 Unix
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Multi-Environment Real-Time
Multi-Environment Real-Time (MERT), later renamed UNIX Real-Time (UNIX-RT), is a hybrid time-sharing and real-time operating system developed in the 1970s at Bell Labs for use in embedded minicomputers (especially PDP-11s). A version named 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). The MERT operating system was a four-layer design, in decreasing order of protection:
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Multi-Environment Real-Time (M ...... RSX-11 emulator also existed.
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UNIX-RTR/3B21D version still in use.
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Real-time operating systems
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Real-time computing applications
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Multi-Environment Real-Time
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UNIX-RTR/3B21D version still in use.
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Multi-Environment Real-Time (M ...... ecreasing order of protection:
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Multi-Environment Real-Time
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Multi-Environment Real-Time
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