Xref: utzoo comp.sys.ibm.pc:26607 comp.lang.prolog:1619
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-winken!uunet!mcvax!hp4nl!rivm!ccenol
From: ccenol@rivm.UUCP (Arnold Reinders)
Newsgroups: comp.sys.ibm.pc,comp.lang.prolog
Subject: Memory bug in LPA prolog
Keywords: LPA-Prolog, Memory bug, MS-DOS, COM1 port
Message-ID: <1281@rivm05.UUCP>
Date: 26 Mar 89 13:12:51 GMT
Reply-To: ccenol@rivm05.UUCP (Arnold Reinders)
Organization: RIVM, Bilthoven, The Netherlands
Lines: 18

I have a problem using LPA prolog. My application is quite big and I
have a lot of trouble of getting it right into memory. At last I
succeeded, but I encountered an annoying bug: LPA prolog throws out the 
serial port interface (set with  MODE COM1...) so that I can't address
my video disk any more. Sometimes I think it throws even the memory resident
part of COMMAND.COM. Is there any way to get around this? I have thought of
two ways, but both ways have their problems:

1. Is it possible to setup my environment, and after having done so, to
   tell DOS that is has less memory (i.e. 512 Kb). If so, how do I tell
   DOS that it has fewer memory than fysically available.
2. Can I communicate directly with my COM-port, but how do I address it,
   and how does a 2400/4800/9600 bps protocol look like?

Maybe there are possibilities I overlooked.
Any help will be appreciated. Thanks in advance.

Arnold Reinders