utils VS winevdm

I didn't use any inline asm, instead I wrote the simplest if statement possible, which I confirmed on x86_64, x86, and aarch64 compiles down to use the platform's supported conditional move instructions. If this changes in the future and there's a need to write inline asm, you can do so in a portable way, e.g. the cmov crate.

There's also cpufeatures which might suit your use case better (depending on exactly how you want to do it).

I have seen that RustCrypto also offers a create for securely zeroing memory with: zeroize

The zeroing routine itself looks fine to me. You might want to compare your code with the (already mentioned) zeroize crate, which does something similar (or maybe identical?).

To save a few clicks, this was found to be, indeed, a Y2K issue, and der v0.4.1 has just been released to fix it. Citing the comment added to the issue after the fact:

I opened a tracking issue for that.

https://github.com/RustCrypto/utils/pull/325#issuecomment-791503136

Not exactly what you were asking, but winevdm [0] does use code from Wine to run 16-bit Windows applications on 64-bit Windows installs that don't support it natively (via ntvdm).

[0] - https://github.com/otya128/winevdm

https://github.com/otya128/winevdm run 16 bit apps on 64 windows

This, along with Windows's own compatibility mode tweaks, should run almost any game that has ever been released on Windows.

WineVDM: https://github.com/otya128/winevdm/releases

It could work with the help with otvdm: https://github.com/otya128/winevdm

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winevdm enables you to keep old Windows programs on life support by running 16-bit Windows (1.x, 2.x, 3.0, 3.1, etc.) on a 64-bit Windows system. Ojakobe explains, "Had a special case of a user who clung to their Windows 7 PC because their work was reliant on a 16-bit program from 1997 (and even on 7 it didn't run properly). Used the program above to make it run reliably on 10."

After that you should now be able to install software. One final sticking point is that some older programs are wrapped up in 16-bit installers, however these can be installed by running the installer with something like otvdm.

Try WineVDM because NTvdm never got a port to 64-bit since the CPU mode it relied on for fast 16-bit code execution gets disabled when a x86 processor is switched into long mode. WineVDM is likely translating 16-bit instruction calls to 32-bit and then passing that off to Windows