Page 5 - DFC2063 OPERATING SYSTEM Topic 1.2
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VARIOUS ARCHITECTURE OS
1. Single processor system
• Some computers use only one processor such as microcomputers.
• On a single processor system, there is only one CPU that perform all
the activities in the computer system.
• However, most of these systems have other special purpose
processors, such as I/O Processor that move data rapidly among
different components of the computer system.
• These processors execute only a limited system programs and do not
run the user program.
• So we define single processor systems as “ A system that has only
one general purpose CPU, is considered as single processor system.
