Path: utzoo!attcan!uunet!zephyr.ens.tek.com!uw-beaver!mit-eddie!bloom-beacon!eru!luth!sunic!mcsun!ukc!reading!cf-cm!andrew
From: andrew@computing-maths.cardiff.ac.uk (Andrew Jones)
Newsgroups: comp.lang.prolog
Subject: Re: Turbo Prolog Versions
Message-ID: <1168@cf-cm.UUCP>
Date: 20 Feb 90 15:18:00 GMT
References: <1641@skye.ed.ac.uk> <1021@trlluna.trl.oz> <1592@gould.doc.ic.ac.uk> <1763@skye.ed.ac.uk> <1601@gould.doc.ic.ac.uk>
Reply-To: andrew@computing-maths.cardiff.ac.uk (Andrew Jones)
Organization: University of Wales College of Cardiff, Cardiff, WALES, UK.
Lines: 25

In article <1601@gould.doc.ic.ac.uk> cdsm@doc.ic.ac.uk (Chris Moss) writes:
[ ... ]
>It strikes me that it's the application that's probably out of date. MS-DOS
>hasn't used .OVL files for years has it?

TURBO-Prolog version 2.0 (the current version) uses a file PROLOG.OVL.
The original TURBO-Prolog manual does not mention this file. I don't
know at what stage the .OVL file was introduced. This file is distinct from
the PROLOG.SYS file which stores setup information such as window sizes
and default directories. If your TURBO-Prolog system works and doesn't
have a PROLOG.OVL file, then a PROLOG.OVL file is not needed.

Having said that, the problem could be that the application in
question may use features not provided in TURBO-Prolog version 1.

I should have thought that the best thing to do is just to try running the
application. If it doesn't work then it needs a later version of TURBO-Prolog.
I don't know what Borland offer in the way of upgrades, but if it proves
impossible to get a free or cheap upgrade, I believe there is a scheme
run by Borland by which educational users can get a significant discount.
Ask Borland for details.

I hope this information is of use.

Andrew.