1.1 KiB
1.1 KiB
| layout | title | permalink | redirect_from | machines | |||||||
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| page | IBM PC XT (Model 5160, 640Kb) with Multitasking MS-DOS 4.00 | /devices/pc/machine/5160/cga/640kb/dos400m/ |
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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 were discovered by the PCjs Project in March 2013. This version of MS-DOS was never officially released in North America. More information is available at Wikipedia and OS/2 Museum.
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 release in July 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.
{% include machine.html id="ibm5160" %}