In what language was MSDOS originally written?

Posted by nebukadnezzar on Stack Overflow See other posts from Stack Overflow or by nebukadnezzar
Published on 2010-05-26T10:54:43Z Indexed on 2010/05/26 12:21 UTC
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ms-dos

In what language was MSDOS originally written in?

The Wikipedia Article implies either C, QBasic or Pascal, but:

C was invented to write UNIX, so I don't believe it was used to write MSDOS
Pascal seems popular to teach programming, but not really popular to write Operating systems in
QBasic didn't seem to be very popular for Operating Systems at the time MSDOS was developed (or was *BASIC ever very popular to write Operating Systems in it?)

Except these three languages there is also Assembly, but I assume that Microsoft already switched from Assembly to a "higher" level language?

Since C was originally invented for UNIX, I still wouldn't think Microsoft is using C... although the Microsoft API is written in C (I find this kind-of oxymoronic, actually).

Can anyone enlighten me on this topic?

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In what language was MSDOS originally written? - Developer IT

In what language was MSDOS originally written?

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ms-dos

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