System Architecture
| State | Mode | VM | Interrupts | |
|---|---|---|---|---|
| User programs | problem | user | on | on |
| Command Language Subsystems (CLSs), Device Support Routines (DSRs), System Subroutines |
system | |||
| Job programs (MTS, PDP, DMGR, RM or HASP, ...) | on or off | |||
| Supervisor (UMMPS) | supervisor | n/a | off | off |
| S/360-67 or S/370 hardware | ||||
UMMPS, the supervisor, has complete control of the hardware and manages a collection of job programs. One of the job programs is MTS, the job program with which most users interact. MTS operates as a collection of command language subsystems (CLSs). One of the CLSs allows for the execution of user programs. MTS provides a collection of system subroutines that are available to CLSs, user programs, and MTS itself. Among other things these system subroutines provide standard access to Device Support Routines (DSRs), the components that perform device dependent input/output.
Read more about this topic: Michigan Terminal System
Famous quotes containing the words system and/or architecture:
“While the system of holding people in hostage is as old as the oldest war, a fresher note is introduced when a tyrannic state is at war with its own subjects and may hold any citizen in hostage with no law to restrain it.”
—Vladimir Nabokov (1899–1977)
“In short, the building becomes a theatrical demonstration of its functional ideal. In this romanticism, High-Tech architecture is, of course, no different in spirit—if totally different in form—from all the romantic architecture of the past.”
—Dan Cruickshank (b. 1949)