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Why can't a 64 bit OS run a 16 bit application?
Fresh5 days ago
Mar 15, 202650116 viewsConfidence Score0%
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Why is it that: a 32-bit OS, when installed on a 64-bit CPU, can run old 16-bit applications, but if you install a 64-bit OS it can't run those applications directly and need some sort of emulation (that doesn't always work perfectly)? To be more specific, I have an 64-bit processor (Intel Core 2 D…
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Fix for: Why can't a 64 bit OS run a 16 bit application?
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From my understanding, it's because when running in Long Mode (x64 native), the CPU itself doesn't support going into 16 bit mode. See Wikipedia. So, in order to support 16 bit mode, the NTVDM (the 16 bit layer in Windows) would have to fully emulat…
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