i've the executable unpacked /unencrypted in case anyone wants it, i couldn't rip the tune neither.

Well what did you try so far? Like changing the mem options, using the
prefetch core, trying loadfix etc.

I only did try diffferent cpus. Will try the rest asap!

Be sure you create a NEW dosbox.conf file when using some cvs builds,
and thoroughfully check the options.

yuo I did that and tested that few options with no success 😒

port 64h is polled, waiting for "input buffer full" bit to be set, but it never happens in DOSBox. I haven't check the source yet to know if it's simply not supported or some other reason is the cause. Anyway, it will need a patch to run in the current version. Let me see about that.
I think I remember this demo - bouncing cube in a vector landscape that becomes a tunnel... not great, but decent.

k thanks, yes its that demo.

okay, there's a patch on my website (pferrie.tripod.com) that seems to work.
DOSBox does not support port 64h behaviour.

thanks a lot 😮