Ref: 06430021
Title: Using PC Support with 3+Open
Date: 3/29/91

Copyright 3Com Corporation, 1991.  All rights reserved.

A workstation can be configured to use IBM's PC Support program
with 3+Open version 1.1 over Token Ring or Ethernet.  PC Support
is a terminal emulation package used for AS/400 connectivity that
typically uses the IBM Lan Support transport drivers.  PC Support
operates by making direct calls to an 802.2 interface on the workstation.
You can use PC Support with 3+Open version 1.1 and an NDIS-based adapter to
achieve AS/400 connectivity through 802.2 and to achieve NetBIOS connectivity
through a transport protocol such as NBP or XNS for file service support.

To provide the 802.2 interface required by PC Support, the MDLC.DOS driver
must be loaded in CONFIG.SYS and bound to the appropriate NDIS adapter.
MDLC.DOS should coexist with other 3Com stacks such as XNS.  However, only
one stack can use the NetBIOS interface on a DOS workstation, so you cannot
implement the full MDLC/MNETB combination as installed by NETSETUP if you
are using XNS, NBP, or TCP primary protocols.

   Caution:  The following configuration has not been officially tested
   by 3Com and 3Com does not support it.  It is not guaranteed to provide
   a complete solution.

To install MDLC.DOS to coexist with other stacks, use NETSETUP to
install the primary NetBIOS stacks and any secondary stacks other than DLC,
then manually modify the configuration as follows.

1.  Copy the MDLC.DOS driver from the \3OPEN\DOSDRV\PROT\DLC subdirectory
on the server to the \3OPEN\DOSWKSTA\LANMAN\DRIVERS subdirectory on the
workstation.

2.  Modify CONFIG.SYS to include the line

    DEVICE=C:\3OPEN\DOSWKSTA\LANMAN\DRIVERS\MDLC.DOS

3.  Modify the PROTOCOL.INI file created by NETSETUP as follows:

    [DLC]
      bindings=ETHERLINKII

The bindings= statement should reflect the appropriate NDIS driver
designation.  If you are not sure what driver to enter, use the same
bindings= entry NETSETUP added for the primary protocol.

4.  Make sure no Lan Support drivers are being loaded on the workstation.

5.  Reboot the workstation.

You should now be able to execute PC Support, which will make calls directly
to the 802.2 interface provided by MDLC.DOS.  MDLC.DOS is a device driver
loaded in CONFIG.SYS and cannot be loaded on demand through DPA.

