Using IBM DLC with Windows for Workgroups 3.10

• Microsoft Windows for Workgroups version 3.1

The following article contains information on the use of Windows for Workgroups with third-party products or configurations that have not been tested and are not supported by Microsoft.

If the steps or procedures described in this article do not function properly, contact the manufacturer of the third-party product for more information or use a supported configuration.

SUMMARY

Windows for Workgroups was not designed to support the use of IBM LAN Support drivers. These drivers provide a data link control interface and perform many of the same functions as Windows for Workgroups real-mode components.

MORE INFORMATION

IBM LAN Support drivers DXMAxMOD.SYS and DXMCxMOD.SYS form a monolithic stack and perform a similar function to the Windows for Workgroups real- mode protocol manager and NDIS driver. Since these drivers do provide NetBIOS services, the Windows for Workgroups network, including peer-to- peer functionality, can be made to work with them.

The drivers cannot be used with Windows for Workgroups unless the protocol manager (PROTMAN.DOS) and Network Driver Interface Specification (NDIS) driver (for example, IBMTOK.DOS) have been removed from the CONFIG.SYS file. By making the modifications below, you can configure your Windows for Workgroups network to run with the IBM LAN Support drivers.

WARNING: Once these changes have been made, you will undo them if you make any changes through Control Panel, Networks, Adapters. This writes the removed files back into the CONFIG.SYS and AUTOEXEC.BAT files.

Installing IBM LAN Support Drivers (Data Link Control)

1. Edit the CONFIG.SYS file and remove the following lines:

         Device=c:\windows\protman.dos /i:c:\windows  <-- the protocol
                                                           manager
         Device=c:\windows\IBMTOK.DOS                 <-- the NDIS
                                                          driver
   
   

2. Add the following IBM LAN Support driver lines:

         Device=c:\lansup\DXMA0MOD.SYS
         Device=c:\lansup\DXMC0MOD.SYS
         Device=c:\windows\workgrp.sys /n
         Device=c:\lansup\DXMT0MOD.sys O=N ST=10 S=25 C=22 ES=2 EST=2
   

   In the above syntax, ST=stations, S=sessions, C=commands, ES=extra.saps and EST=extra.stations.

3. Edit the AUTOEXEC.BAT file and remove the following line:

         Net Start
   

4. Restart the computer and Windows for Workgroups.

For help with data link control IBM LAN support drivers, call IBM product support services.

For additional information on integrating Microsoft data link control with Windows for Workgroups, consult the Windows for Workgroups Resource Kit, Appendix E.

Support provided by Microsoft Product Support Services for LAN Manager is available on a fee-basis. For additional information about Microsoft support options, call the Microsoft Sales Information Center at (800) 426-9400, Monday through Friday, 6:30 A.M. to 5:30 P.M., Pacific time, excluding holidays.