                             READ.ME

                    Updated September 5, 1990



This file contains supplemental information for release 2.1 of IBM
X-Windows for IBM DOS (DOS X-Server).


Additional READ.ME files
------------------------

As we add new network interfaces and fonts, the Supplemental Fonts Disk
and Network Interface Options Disk may be updated independently of the
main DOS X-Server disks.  These disks may contain READ.ME files with
information about new additions.


Memory Availability Under VCPI
------------------------------

The DOS X-Server uses extended memory.  It does not use expanded
(LIM/EMS) memory.  However, when you are running the DOS X-Server on a
386 and using a 386 memory manager, such as 386-to-the-Max, then the
memory available to the DOS X-Server is the memory that has been
allocated to the expanded memory pool for the 386 memory manager.  In
the case of 386-to-the-Max, this is the value for the EMS option on the
386MAX device command in your CONFIG.SYS file.

Please refer to the documentation for your 386 memory manager for more
information on the Virtual Control Program Interface (VCPI).  The DOS
X-Server automatically detects the presence of a 386 memory manager
that supports VCPI.


1024x768 VGA Modes
------------------

Some 1024x768 VGA cards that use the Tseng Labs VGA chip will display a
colored border around the root window in the 1024x768 16 color mode.
If you experience this problem, a BIOS upgrade from the manufacturer of
your VGA card may fix it.


BIOS System Keyboard Intercept
------------------------------

Some keyboard handling improvements require that your BIOS support the
system keyboard intercept function.  The HOOKTEST program will verify
whether or not your BIOS supports this function.  If HOOKTEST indicates
that your BIOS does not support this function, you should obtain a BIOS
upgrade from your dealer or computer manufacturer.


Silent Installation Failure
---------------------------

The installation process can fail without warning, notably by not
creating the XSIGHT.CFG file, if there is not enough available memory.
This is very likely to occur if you have the FTP Software PC/TCP loaded
into memory with a large number of packet buffers.  If, when you try to
run the DOS X-Server, the server aborts because it cannot find the
configuration file, try reinstalling with no TSR programs loaded.


Sun PC-NFS and XRSH/XREXEC
--------------------------

The XRSH and XREXEC features are not currently supported by the Sun
PC-NFS network interface.  We expect to make these functions available
in the near future.  If you need to use XRSH or XREXEC with PC-NFS,
please check for a READ.ME file on the Network Interface Options disk
to see if it has been upgraded to include this support.  If not,
contact your authorized IBM representative.

