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OS/2

OS/2. Kyu Oh Kevin Koo Matt Liberati Stephanie Engel. History of OS/2. Version 1 Version 2 Warp 3 Warp 4. Version 1. Version 1.0 was released in 1987 IBM and Microsoft produced OS/2 version 1.0 Processor 286 Version 1.1 was released in 1988 Presentation Manager (PM)

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OS/2

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  1. OS/2 Kyu Oh Kevin Koo Matt Liberati Stephanie Engel

  2. History of OS/2 • Version 1 • Version 2 • Warp 3 • Warp 4

  3. Version 1 • Version 1.0 was released in 1987 • IBM and Microsoft produced OS/2 version 1.0 • Processor 286 • Version 1.1 was released in 1988 • Presentation Manager (PM) • Version 1.2 was released in 1989 • Improved PM • Version 1.3 was released in 1991 rectangle • smaller, faster, and more stable than previous versions.

  4. Version 2 • Version 2.0 was released in 1992 • first 32 bit operating system for personal computers • used Virtual DOS Machines (VDMs) • Workplace Shell (WPS) • Version 2.1 was released in 1993 • more CD-ROM and SCSI drivers

  5. Warp 3 • Warp 3 was release in 1995 • Required 4 MB of RAM • Improved Workplace Shell in performance and functionality • TCP/IP and Internet communications

  6. Warp 4 • Warp 4 was released in 1996 • new features • Java • VoiceType Navigation • Dictation • “Universal Client” because of its unparalleled network connectivity.

  7. Today OS/2 Server • Current version 4.51 • IBM product • Runs on Intel, Cyrix, AMD pentium, and Intel • Cost $250

  8. Semaphore • What is it • 3 Types

  9. Scheduling • Multitasking • Priority Based

  10. Deadlock • Definition • Situation • Result

  11. Graphical User Interface • The Beginnings of OS/2 • OS/2 Warp 4

  12. The Beginnings of OS/2 • OS/2 was originally written for the 286 • The first version of OS/2 was released in late 1987 • The command line interface of OS/2 1.0 looked a • lot like DOS

  13. OS/2 1.0 had a number of important features that DOS did not have - and which many other operating systems began to support only many years later. • Preemptive multitasking • Multithreading • Interprocess communication (IPC) • Virtual memory support (swapping) • Fully protected operation • Dynamic linking (DLLs) • Support for 16MB physical memory

  14. In OS/2 1.0 there wasn't really much to look at. The interface was text only screenshots from the OS/2 1.0 tutorial program

  15. The worst obstacle that OS/2 faced was DOS support. This was caused by a combination of several factors: • No support for virtualization of real mode on the 286 • processor. • Seriously incomplete DOS API forcing applications to • access hardware directly. • Memory constraints of real mode.

  16. OS/2 Warp 4 • Released in August, 1996 • Its new features included a "beautified" GUI; an ex-Apple • programmer designed the new graphical icons • A full Java Development Kit, which included • a Java Virtual Machine • OS/2 Warp 4 is fully Object Oriented via SOM • Pre-emptively multitasks all sessions (including DOS/Win) • Faster than WinNT, more stable than Win95, easier to • use than both WinNT and Win95, it is safe proven • technology, it runs practically all of your DOS and • Windows 3.1 programs

  17. OS/2 Warp 4desktop with the WarpCenter and some Object Desktop's component

  18. In OS/2 Warp 4, you can run practically all OS/2, Java, DOS, and Win 3.1 programs all at the same time with no problem!

  19. Characteristics • OS/2 is a single-user operating system • Uses pre-emptive multi-tasking to schedule CPU time • OS/2 was the first Personal Computer to provide intrinsic multi-tasking

  20. Multi-Threading • Native applications can utilize multi-threading capability • Not legacy applications from DOS or Windows 3.1

  21. Differences • OS/2 allows for different AUTOEXEC.BAT files to be set for different DOS applications • Lower end versions of OS/2 either: • require for Windows 3.1 to already be installed on the computer • includes a re-compiled version of Win 3.1.

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