DOS ain't dead

OS/2 extender (Developers)

posted by Ringding, 11.09.2025, 17:44

> In the same way that we have 32-bit DOS extenders to allow access to memory
> above 1 MiB - is it technically feasible to have a 64-bit OS/2 extender to
> allow access to memory above 4 GiB?
>
> What would that look like?

It would be very difficult, as the kernel would need to be made aware of it. In DOS, the extender itself (or the DPMI host, which might be the same thing) is the kernel, which can do whatever it wants to. Under OS/2, user programs are not allowed to exert this kind of control over the machine.

Complete thread:

• OS/2 extender - kerravon, 10.09.2025, 21:05 (Developers)
  • OS/2 extender - Rugxulo, 10.09.2025, 21:30
  • OS/2 extender - Ringding, 11.09.2025, 17:44
    • OS/2 extender - kerravon, 11.09.2025, 17:57
      • OS/2 extender - Ringding, 11.09.2025, 20:41
        • OS/2 extender - kerravon, 12.09.2025, 00:08
          • OS/2 extender - Rugxulo, 12.09.2025, 04:07
            • OS/2 extender - kerravon, 12.09.2025, 16:55
          • OS/2 extender - Ringding, 12.09.2025, 17:20
            • OS/2 extender - kerravon, 12.09.2025, 18:03