Hi,
I'm not very knowledgeable about systems programming or DPMI, but I
don't think you can (normally) access ports under ring 3 (e.g.
CWSDPMI). Try CWSDPR0.EXE (ring 0) or WDOSX (run "stubit") instead.
Who knows what this was tested under (Win9x? JEMM386?).
On Mon, Oct 2, 2023 at 7:14 PM Paul Dufresne via Freedos-user
<freedos-user@lists.sourceforge.net> wrote:
>
> I discovered that if I comment out the two while (in vga.c):
> void wait_vsync()
> {
> //while (inportb(0x3da) & 8);
> //while (!(inportb(0x3da) & 8));
> }
>
> Then the game under dosbox run just like under VirtualBox.
>
> I have tried all the available options for emulated graphics "card" under
> VirtualBox... no change.
>
> So... I guess what I/we need, is a more emulation friendly wait_vsync()
> function.
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