scheme on unix

[SULLIVAN%suny-bing.csnet at RELAY.CS.NET]

I have MIT scheme Unix version 6.1.  Is there a newer Unix version?
One with a reliable compiler?  (even a commercial scheme would interest me).

I am running GNU emacs, which has a Scheme mode built-in.  There is a provision
for transferring control back and forth between scheme and emacs, but it doesn'treally work.  In scheme, the (emacs) call starts a new emacs process (very slow)Is there any way to conveniently go back and forth, a la Ledit and Franz lisp?

	Fred Sullivan
 	Dept. Math. Sci.
	sullivan at suny-bing.csnet

At last I'm a person rather than a number!