System software; precursor to modern operating systems
In computing, a resident monitor is a type of system software program that was used in many early computers from the 1950s to 1970s. It can be considered a precursor to the operating system.[1] The name is derived from a program which is always present in the computer's memory, thus being resident.[2] Because memory was very limited on those systems, the resident monitor was often little more than a stub that would gain control at the end of a job and load a non-resident portion to perform required job cleanup and setup tasks.
On a general-use computer using punched card input, the resident monitor governed the machine before and after each job control card was executed, loaded and interpreted each control card, and acted as a job sequencer for batch processing operations.[3] The resident monitor could clear memory from the last used program (with the exception of itself), load programs, search for program data and maintain standard input-output routines in memory.[2]
Similar system software layers were typically in use in the early days of the later minicomputers and microcomputers before they gained the power to support full operating systems.[2]
^Introduction to Operating Systems 000.18/018, Johns Hopkins University Computer Science Department
^ abcOperating Systems - Lecture 02, University of Auckland
In computing, a residentmonitor is a type of system software program that was used in many early computers from the 1950s to 1970s. It can be considered...
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produce an action from the monitoring system. These actions vary; An alarm may be sent (via SMS, email, etc.) to the resident sysadmin, automatic failover...
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operating system command-line interfaces were implemented as part of residentmonitor programs, and could not easily be replaced. In 1964, MIT Computation...
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System, which usually took the form of several punched paper tapes (residentmonitor plus utilities), a similar Operating System for larger configurations...
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