DOCUMENT:Q85910  17-DEC-2000  [msdos]
TITLE   :IBM LSP Drivers Err Msg: Invalid Shared RAM Address
PRODUCT :Microsoft Disk Operating System
PROD/VER:MS-DOS:5.x,6.0,6.2,6.21,6.22
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft MS-DOS operating system versions 5.0, 5.0a, 6.0, 6.2, 6.21, 6.22 
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SYMPTOMS
========

If you load the IBM LAN Support Program (LSP) drivers for the IBM Token Ring
adapter into upper memory blocks (UMB) using DEVICEHIGH with MS-DOS, you may
receive the following error message:

   Invalid shared RAM address

WORKAROUND
==========

To work around this problem, load the LSP drivers into low memory, or load the
drivers high, adding a comma (,) to the end of the DEVICEHIGH line in the
CONFIG.SYS file as follows:

   DEVICEHIGH=C:\DXMC0MOD.SYS 400000000001,


MORE INFORMATION
================

IBM LAN Support Program (LSP) is essentially the IBM network adapter software.
Typically, there are three files loaded in the CONFIG.SYS file for these
drivers, each providing various levels of driver support, much PROTMAN, NDIS
driver, and 802.2 support in Microsoft LAN Manager.

The following shows the syntax for the IBM LSP drivers:

device=DXMCnMOD.SYS  addr0, mem0, etr0, addr1, mem1, etr1

where:

addr0 = Replace with locally administered MAC address for the primary adapter or
first.

mem0 = Replace with RAM location for the primary adapter or first. See your IBM
technical reference, Token Ring configuration guide, or PS/2 reference disk to
determine or change this address.

etr0 = Early token release functionality is provided if etr0=1 and the data rate
for adapter is greater than 4 megabits per second; otherwise, this argument is
ignored.

The file will be DXMC1MOD.SYS IBM 3270 for Workstation Program support, or
DXMC0MOD.SYS if Workstation Program support is not being used.

Additional query words: 6.22 3.10 EARLY TOKEN RELEASE PS/2 memmaker

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Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600 kbMSDOS500 kbMSDOS500a
Version           : MS-DOS:5.x,6.0,6.2,6.21,6.22

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