It depends. Slime, the backend, works for abcl. However, perhaps not
cusp.
First, abcl must support unicode because cusp uses that as the
character encoding.
Second, i have noticed that even with lisps that do support it, like
ecl, it becomes flaky when trying to load a library that has some
errors in it.
You should just try it and see how it works.
You should first try to install the updated version.
http://wiki.github.com/Eyaro/ejasko.tim.lisp/getting
Then, under lisp preferences and the Implementations tab, you will
find the following:
Lisp Executable Arguments
Lisp Executable Environment
Lisp Executable .
You should look under the using section to get an idea of what each
one is for. Then tell us if abcl connects. If not, i do have some code
that should expand the lisp versions that cusp can be used with,
including non-unicode versions. However, it hasn't been integrated and
no-one has needed it yet, including me. Until now, perhaps...