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Initial commit (a clone of the jsmachines project as of v1.15.3)

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jeffpar 2014-09-27 14:52:57 -07:00
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"Multitasking" MS-DOS 4.00
---
This simulation demonstrates the first unearthed copy of Microsoft's "multitasking" version of MS-DOS. The
[original images](/disks/pc/dos/microsoft/4.0M/) were released on [jsmachines.net](http://jsmachines.net/)
in March, 2013, and have since been copied to other web sites. This version of MS-DOS was never officially released
in North America. More information is available at [Wikipedia](http://en.wikipedia.org/wiki/Multi-tasking_MS-DOS_4.0)
and [OS/2 Museum](http://www.os2museum.com/wp/?p=1769).
Note: The designation "4.0M" is not an official version number; it's an internal version number used only to
differentiate these disk images from those of the official MS-DOS 4.00, released in June, 1988.
The PCjs machine configuration below boots MS-DOS 4.0M. To access the MS-DOS "Session Manager" after it's booted,
tap the **Alt** key.
[IBM Model 5160](machine.xml "PCjs:ibm5160:::debugger")