Glen Starchman <glenstar2@[...].com> 
>  I am investigating the use of multiple VMs in my language and looking for 
>  examples of languages which use two or more VMs for parallel execution of 
>  bytecode. Anyone have any good references?

When you say "multiple VMs" what exactly do you mean?  Are you (using
OO terminology) referring to having multiple instances of a single
bytecode execution class, or having multple classes that can execute
bytecode?  The former case is what Tcl does[*], and it is (fairly)
easy to get right so long as you don't use global variables.  And
watch out for non-reentrant sys- and stdlib-calls, and other things I
don't remember/know about.  :^)

Donal.
[* If compiled with thread support and with the thread-extension
   loaded to provide script-level access if so desired. ]
-- 
Donal K. Fellows, Department of Computer Science, University of Manchester, UK.
(work) fellowsd@[...].uk     Tel: +44-161-275-6137  (preferred email addr.)
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