Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!bradley
From: bradley@cs.utexas.edu (Bradley L. Richards)
Newsgroups: comp.lang.prolog
Subject: Re: IBM PC/AT Prolog products
Message-ID: <13298@cs.utexas.edu>
Date: 7 Oct 90 16:57:01 GMT
References: <16556@thorin.cs.unc.edu>
Organization: U. Texas CS Dept., Austin, Texas
Lines: 25

In article <16556@thorin.cs.unc.edu> chu@church.cs.unc.edu (Heng Chu) writes:
>Can anyone recommend any
>decent commercial Prolog product (besides Turbo Prolog which we have and don't 
>like) on IBM PC/286 which can easily accomplish the followings...

I moved from Turbo Prolog to Arity Prolog, and am fairly happy with it.  Arity
was substantially less expensive than the PC Prolog marketed by Quintus, and
has all of the features you mention in your list.

>It would be better if it also provides facility to use memory above 640K.

On the other hand, Arity and as far as I know every other major PC prolog
except Turbo limits you to 64k of stack space.  It's possible to get useful
work done in spite of this, as long as you are willing to use side-effects
(and if you don't need to backtrack through a really large search space).

I keep hoping they'll get embarrassed by this silly limitation and fix it--
in most other respects they have a top-notch product.

Bradley

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