DOS ain't dead

hot dos (Developers)

posted by kerravon , Sydney, Free World South, 13.05.2025, 09:04

> > > For instance, idling with sti and hlt, if it
> > > works,
> >
> > What is the reason this might not work?
>
> Virtual Machines or Virtual 86 Mode Monitors may either support idling with
> HLT, ignore the HLT silently, or even treat it as a fault exception.
> Likewise in DPMI Protected Mode, a HLT may not be supported by the DPMI
> host.
>
> On dosemu2's (native mode, no KVM) DPMI host HLT leads to a GPF.

I'm interested in this.

Was MSDOS modified in order to "be nice" to V86 machines?

If so, when was it modified, and is DOS 4.0 "nice"?

Complete thread:

• hot dos - kerravon, 08.05.2025, 00:24
  • hot dos - ecm, 08.05.2025, 00:36
    • hot dos - kerravon, 08.05.2025, 01:25
      • hot dos - ecm, 08.05.2025, 10:42
        • hot dos - kerravon, 08.05.2025, 12:55
          • hot dos - ecm, 08.05.2025, 20:07
            • hot dos - kerravon, 08.05.2025, 23:21
              • hot dos - ecm, 09.05.2025, 01:16
                • hot dos - kerravon, 09.05.2025, 02:01
                  • hot dos - Ringding, 09.05.2025, 14:33
                    • hot dos - kerravon, 09.05.2025, 15:22
                      • hot dos - Ringding, 09.05.2025, 16:13
                        • hot dos - kerravon, 10.05.2025, 01:32
            • hot dos - kerravon, 13.05.2025, 09:04
          • hot dos - Ringding, 10.05.2025, 09:21
            • hot dos - kerravon, 10.05.2025, 14:40
              • hot dos - RayeR, 12.05.2025, 19:51
                • hot dos - kerravon, 12.05.2025, 23:02
  • hot dos - Rugxulo, 08.05.2025, 03:22
    • hot dos - kerravon, 08.05.2025, 07:24
  • hot dos - rmcconne, 11.05.2025, 15:15