Mixed-mode Operating System for Real-time Performance

Article English OPEN
M.M. Hasan ; S. Sultana ; C.K. Foo (2017)
  • Publisher: Universitas Gadjah Mada
  • Journal: ASEAN Journal on Science and Technology for Development (issn: 0217-5460, eissn: 2224-9028)
  • Related identifiers: doi: 10.29037/ajstd.178, doi: 10.29037/ajstd.303
  • Subject: Technology (General) | Science (General) | Q1-390 | T1-995

The purpose of the mixed-mode system research is to handle devices with the accuracy of real-time systems and at the same time, having all the benefits and facilities of a matured Graphic User Interface (GUI) operating system which is typically nonreal-time. This mixed-mode operating system comprising of a real-time portion and a non-real-time portion was studied and implemented to identify the feasibilities and performances in practical applications (in the context of scheduled the real-time events). In this research an i8751 microcontroller-based hardware was used to measure the performance of the system in real-time-only as well as non-real-time-only configurations. The real-time portion is an 486DX-40 IBM PC system running under DOS-based realtime kernel and the non-real-time portion is a Pentium III based system running under Windows NT. It was found that mixed-mode systems performed as good as a typical realtime system and in fact, gave many additional benefits such as simplified/modular programming and load tolerance.
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