DOS ain't dead - DOS for 64 bits?

DOS for 64 bits? (Users)

posted by libz, 22.10.2025, 22:00

Hello kerravon,

Yes, I've been at https://www.pdos.org/ before.
I've read all of it, including some other texts by you and we have some common thoughts in several themes.

But I'm not a system programmer and I'm not at a level of knowledge that I can take what I read at the website and conclude that pdos is a DOS like system where I could run x86_64 applications.
I didn't get that idea before, and I hardly get it now.
The programming I do is about business data and associated areas. No C, or assembly.

The most relevant section for this seems to be 'University Challenge x64'
So, what I miss is a tutorial where it could be shown step by step what to do to have pdos booting in a x86_64 hardware (and in other ones as well).
I'm unaware of what could be done using EFI. It seems that you've programmed pdos to run as a UEFI module, is that correct?
Can pdos run 64 bit programs and use GBs of RAM and big files?
Can pdos run all ancient MSDOS programs, like Turbo Pascal, Norton Commander, etc?

Some howtos and some videos would be of great help for me and for others like me that don't have your level of expertise in the subject.
I know, I know, it's a lot of work that I'm asking.

Thank you,
All the best.

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Complete thread:

DOS for 64 bits? - libz, 17.10.2025, 23:37
- DOS for 64 bits? - kerravon, 18.10.2025, 10:34
  - DOS for 64 bits? - kerravon, 18.10.2025, 10:38
    - DOS for 64 bits? - kerravon, 18.10.2025, 11:03
      - DOS for 64 bits? - libz, 22.10.2025, 22:00
        DOS for 64 bits? - kerravon, 23.10.2025, 04:16
        DOS for 64 bits? - kerravon, 23.10.2025, 04:29
        DOS for 64 bits? - kerravon, 23.10.2025, 05:59