> 	Attempting to enter Play With Me 3 (16 bits) hangs the VM and ALT .
> cannot interrupt.

This happened to me trying to compile the VM for HP-UX.  The problem was
that the pluggable primitives were not working.  A flag was needed for
the linker to specify that all symbols should be exported to shared
libraries (in my case, -Wl,-E  -- thanks to Georg Gollmann and Bruce
O'Neel).  

Saludos, Juan.