From: GPRADA@ITECCOL.BITNET
Subject: Using cdrom software on a netware lan
Reply-To: GPRADA@ITECCOL.bitnet
Organization: FUNET-NGW
Distribution: alt
Date: Wed, 22 Jul 1992 15:21:00 GMT

                       PROBLEM DESCRIPTION

We are trying to run a stand alone database program, with
information in CDROM discs, over a Netware supported LAN, but it
seems to exist a conflict between NET3, the Netware program, and
the CAROUSEL task switcher which the database software uses.

When a user wants to access the CDROM database, he turns on the
workstation and boots from the hard disc, then he loads IPX (the
ethernet transport protocol) and CDNET (to gain access to the
server CDROM discs), and finally he runs the database program which
is installed on his hard disc. In this case he can normally use the
program, accesing both index and full page images.

The problem arises when the database program is not installed on
the workstation hard disc, but on the LAN server. In this case, the
user must load IPX and NET3 so he can log in the netware server,
and then he can run the CDNET and the database programs. When the
database program starts loading, the screen goes crazy and the
computer gets blocked.

We have tried to load NET3 in the High Memory Area, in extended
memory and in expanded memory. We also tried to load NET3 after and
before loading CDNET, all without success. Other attempts include
using different screens and adapters (VGA,EGA), different LAN
boards (EXOS 205T, NE1000, ACER 5220A) and a 80286 mainboard.

Using Manifest, the QEMM386 utility, we found that both CAROUSEL
and NET3 use the 10H and 21H machine interrupts. We think that this
is the cause of the problem, but we don't know how to override it.

Below there is a description of our hardware and software
facilities.

          Juan Pereira
          GPRADA@ITECCOL.BITNET
          Telecommunications Technical Information Center
          Research Department - National Telecommunications Agency
          ITEC - TELECOM




                HARDWARE AND SOFTWARE DESCRIPTION

CDROM DATABASE:
     UMI IEEE/IEE Publications Ondisc.
     Links an abstract-and-index database to a full-page image
     database of complete articles.
     Includes 1 index disc and about 90 image discs.
     The access software needs MS-DOS 3.1 or 3.3.
     Developed using the CAROUSEL task switcher and the TMSFAX
     image manager programs.

CDROM DISC SERVER:
     MERIDIAN DATA, model 314-14.
     80386/25 mainboard with 4 megabytes of RAM.
     3.5" floppy disc drive.
     2 ADAPTEC AHA1540/1542B Intelligent SCSI boards.
     14 TOSHIBA CDROM drives.
     200E ethernet board.
     Software: CD-NET version 4.2.

WORKSTATION:
     DAEWOO TELECOM.
     80386 mainboard.
     640K of conventional RAM and 3456K of extended RAM.
     5.25" and 3.5" floppy disc drives.
     116 Megabytes Hard Disc.
     VGA screen and EGA/VGA board.
     ACER 5220A ethernet board.
     Software: MS-DOS 3.3 operating system and QEMM386 version 5.12
     memory manager.
     CDNET installs MSCDEX version 2.10

LOCAL AREA NETWORK:
     Thin cable.
     Server Software: NETWARE version 2.2.
     Woskstation Software: IPX version 3.02 and NET3 version 3.01.
Newsgroups: alt.cd-rom