DOS ain't dead - DOS for 64 bits?

DOS for 64 bits? (Users)

posted by kerravon , Ligao, Free World North, 18.10.2025, 10:34

> Hi all,
>
> Maybe because I'm older now, I realize that focus is important. As is a
> distraction-free setup, as is speed of execution, as is simplicity.
>
> DOS has all of this.
> But everything I read about DOS is about the past.
> 16bit, 32bit, little RAM...
>
> I don't know how to program in C or assembly, so I cannot help.
> But could help in testing or in propaganda.
>
> Would there be space for a DOS (like) for the present and for the future,
> that could use all the 64bit CPU, GBs (or even TBs) of RAM, with direct
> access to the hardware, that could beat all Windows and Linux in speed,
> simplicity and focus for the user?

I believe UCX64 has all of that.

Available from https://pdos.org

Why do you want to directly access the hardware instead of doing
a UEFI call though? MSDOS did the same thing - a BIOS call.

Regardless, you can do either - even as an application.

But - like with MSDOS - you're officially supposed to do an INT 21H
call to access MSDOS services - but in UCX64 the INT 21H has been
replaced by a callback function instead. It probably could be done
via INT 21H though - if that served some purpose.

BFN. Paul.

Post reply

Complete thread:

DOS for 64 bits? - libz, 17.10.2025, 23:37 (Users)
- 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