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- Newsgroups: comp.sys.apple2
- Path: sparky!uunet!cs.utexas.edu!torn!utgpu!utstat!philip
- From: philip@utstat.uucp (Philip McDunnough)
- Subject: Re: Swich It and Multitasking
- Message-ID: <1992Aug21.165140.26700@utstat.uucp>
- Organization: University of Toronto, Dept. of Statistics
- References: <01GNSVA1VMW00008SC@MSUS1.MSUS.EDU>
- Date: Fri, 21 Aug 1992 16:51:40 GMT
- Lines: 19
-
- In article <01GNSVA1VMW00008SC@MSUS1.MSUS.EDU> PKBRANDON@MSUS1.MSUS.EDU writes:
- >The difference between program switching and true multitasking is that
- >the latter (also referred to as time sharing) continues the operations of
- >two (or more) programs _simultaneously_.
-
- Unless you are talking about parallel processing this is not the case.
- Preemptive multitasking is what is called true maultitasking, and it
- does not run several programs simulataneously. The OS's program
- scheduler mangaes the time allocated to each task. You never have both
- tasks working at once.
-
- Preemptive multitasking does not demand a powerful cpu. Unix was developed
- on a fairly weak one, and my first computer was the HP Integral which was
- an 8MHz 68000 System V transportable with Unix in ROM (single user).
-
- [ ]
-
- Philip McDunnough
- philip@utstat.toronto.edu
-