16 lines
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956 B
Markdown
16 lines
No EOL
956 B
Markdown
"Multitasking" MS-DOS 4.00
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This was first unearthed copy of Microsoft's "multitasking" version of MS-DOS. It's since been copied
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to other web sites, but these are the original images, released on [jsmachines.net](http://jsmachines.net/)
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in March, 2013. This version of MS-DOS was never officially released in North America. More information
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is available at [Wikipedia](http://en.wikipedia.org/wiki/Multi-tasking_MS-DOS_4.0) and
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[OS/2 Museum](http://www.os2museum.com/wp/?p=1769).
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Note: The designation "4.0M" is not an official version number; it's an internal version number used only to
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differentiate these disk images from those of the official MS-DOS 4.00, released in June, 1988.
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The [IBM Model 5160](/configs/pc/machines/) machine configuration below boots MS-DOS 4.0M. To access the MS-DOS
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"Session Manager" after it's booted, tap the **Alt** key.
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[IBM Model 5160](/configs/pc/machines/5160/cga/640kb/dos400m/ "PCjs:ibm5160:::debugger") |