Mail Archives: djgpp/1999/10/18/06:52:58
On Sun, 17 Oct 1999, Dave Dribin wrote:
> This particular game is Callus. You are correct that it is a
> protected-mode program. This is what it displays at startup:
>
> PMODE/W DOS Extender v1.33
Sigh... This is a known problem with (at least some versions of)
PMODE/W: it doesn't seem to unhook Int 31h on exit, leaving it to
point to void.
> Finding a replacement is difficult.
Try to find a different (newer?) version of PMODE/W. If PMODE/W is
actively supported by its vendor, try mailing them or looking at their
Web site.
> Is there anything the launching program can do to save and restore
> Int 31h?
Sadly, no. Since restoring an interrupt vector requires a call to
another function of Int 31h, this is a catch-22.
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