On Sat, 2012-12-15 at 20:02 -0500, Richard Hennessy wrote:
> The TI-89 has a CAS. I have one, which is how I know. It is limited and
> also much slower than an Maxima on an i7 or any PC. It can be programmed in
> C however to improve performance, which I have done for a few cases. I don't
> know if it can be programmed in Lisp. I think the chip is faster than a
> TI-84, it's a Motorola 68000.
I believe that the CAS in the TI-89 is a port of, or is at least based
on, the DERIVE CAS which TI bought from its original owners (IIRC SOFT
WAREHOUSE). I had DERIVE for PC many years ago; it was pretty good for
the price but still limited. It was marketed toward the education
community, which may have helped the TI 89 succeed there. I *think*
that DERIVE was at least partly written in a custom-developed version
of lisp which the company sold under the name MU-LISP. It differed
quite a bit from conventional lisps.
--
Bill Wood