MUSE@XX.LCS.MIT.EDU (Tom Cloney) (12/01/87)
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880716a@aucs.UUCP (Dave Astels) (05/12/89)
Hello. I a budding AI programmer/researcher (Natural Language/Cognition). I am currently using Xlisp for my work. I have used version 1.6 with success. I recently got version 2.0 (which is much better) but it doesn't leave me enough free memory to develope reasonable sized programs. I am using an IBM PC clone with 640K. I am considering buying a LISP system. PC Scheme is in my price range (I'm a student), and I am wondering if anyone has any advice in this matter. I am not familiar with Scheme. How close to Common LISP is it? Whould there be much problem porting from PC Scheme to Common LISP? How does it work on a 640K PC (I am planning to get an EMS memory card in the future). The emacs-like editor sounds nice, what is the developement environment like? Any advice and opinions would be appriciated. Also, is there any reasonable alternatives in the same price range? Thanks in advance. -Dave
tg1e+@andrew.cmu.edu (Timothy R. Gottschalk) (09/02/89)
Anyone:
I know absolutely nothing about Scheme but I want to learn it. I have
an IBM PS/2-50 and I want to install it onto my machine. I'm sure a version
of Scheme for the PC exists -- can anyone tell me where to purchase it
or how to easily get a copy? Also, how portable would it be to cscheme
on Unix? I've seen mentions to XScheme on this bboard but I don't know
how to download it.
Please respond to me personally (tg1e+@andrew.cmu.edu) or the bboard.
Help!!
trg.WONGWF@NUSDISCS.BITNET (06/08/90)
Hello Everyone,
First, my 2 cents worth : SCOOPS comes with PC-Scheme. My experience
with SCOOPS is that it makes debugging a little difficult - with all the
indirections, you hardly know where something fails by using the backtrace
facility.
Now, my problem ... I have been using PC Scheme 3.03 for some time
now and there have been those desperate moment where the interpreter bombs
on me without any valid reasons. The first time it happened, it gave "Timer
already running" or something like that. Well, silly me, I thought to myself,
its probably because I use ENGINES and when my program bombed, it didn't reset
the timer properly.
Some time later, I was satisfied with my program so I started removing
"writeln"s from it. It bombed. The funny thing was that I narrowed it down to
a particular "writeln" which was of no particular significance - when it is in,
the program worked, without it the program bombed. I went around it by removing
some "write-char" statements (which by the way, was important) together with
that particular "writeln". It worked - or so I thought !
Now, my program sometime works perfectly well while at other time,
WITHOUT ANY modifications, failed. It usually gives "VM Error - ()" whatever
that means. I did a backtrace but I have no reason to expect it to fail at the
place where it said it did. I am now at the conclusion that PC Scheme is
unstable ! (although I hardly know why) Or maybe I'm using the wrong version.
Anyone out there have similar experiences ? Perhaps someone could give
me some pointers.
Weng-Fai, WONG,
Dept. of Info. Sys. and Comp. Sc.,
National University of Singapore,
Lower Kent Ridge Road,
Singapore 0511.
Republic of Singapore.
email : wongwf@nusdiscs.bitnetjoberd@FRCIIL71.BITNET (04/22/91)
to be added to the list of PCSCHEME users Jacques OBERDOERFFER Universite de NANCY 1 FRANCE JOberd -at FRCIIL71 (earn)