For: 			ICA DOS Client 
Replaces:		All versions prior to January 2001
Date:			January 2001
Language supported: 	English (US)


Description
-----------
This 32-bit version of the Citrix ICA Client for DOS provides all the
capabilities of the original 16-bit ICA Client for DOS, while 
requiring less conventional memory.

The client program uses 32-bit code working with extended memory
through the use of DOS Protected Mode Interface (DPMI) technology.
DPMI support is provided by the Rational Systems, Inc. DOS/4GW
DOS Extender, Run-time Version 1.97.

Where to Find Documentation
----------------------------
This document contains last-minute information about the ICA
DOS Client. For more information about the ICA DOS Client,
see the Citrix ICA Client Administrator's Guide for the ICA
DOS Client, available in an Adobe Portable Document format
(PDF) file (icados.pdf).

The Administrator's Guide is in the \DOC directory on the Citrix
ICA Client CD. Use the Adobe Acrobat Reader or Exchange program
to view PDF files. You can download Acrobat Reader for free
from Adobe's Web site at http:/www.adobe.com. 

Installation Instructions for the ICA DOS Client
-------------------------------------------------
To install the ICA DOS Client, follow the instructions
in the Citrix ICA DOS Client Administrator's Guide.

System Requirements
-------------------
This version of the Citrix ICA Client for DOS requires:

   -  An Intel 386 or later processor (or compatible processor from
      another vendor) to support the DPMI technology

   -  At least 2MB RAM (sufficient memory for the normal
      requirements of a minimally configured DOS system and the
      client with extended memory)

File Names
------------
The file names are identical to those of the 16-bit version of the
ICA DOS Client, with the following exceptions:

   -  WFENG.DDL is embedded in wfclient.exe

   -  DOS4GW.EXE, the DOS extender executable, is a new file.

Limitations and Known Issues
----------------------------
The client is functionally equivalent to the 16-bit version of the DOS
Client (Build 581) with the following differences and restrictions:

1. Support for the Microsoft LAN Manager 2.1 DOS TCP/IP Stack and the
   Novell LAN Workplace for DOS TCP/IP Stack is now provided by a
   Virtual Socket Library TSR. The 32-bit DOS Client automatically
   loads the appropriate VSL component prior to starting the
   network connection.

2. The DOS conventional memory requirements are greatly relaxed.
   Approximately 100K of conventional memory is required to run
   wfclient.exe. Additional memory in the form of extended memory is
   also required.

3. The VSL implementation now enumerates servers and resolves server
   names.

4. The client displays an ICA splash screen when establishing
   connections.

5. Direct asynchronous serial connections from client to server may
   not work reliably at high baud rates on slower 386 and 486 machines
   with 8250 communications controller chips. For optimum performance,
   run the client on a machine configured without himem.sys and 
   emm386.exe in config.sys.  
   
   For direct asynchronous serial connections, Citrix recommends a
   16550 chip, such as the 16550AFN.

6. Commonly-used graphical objects such as icons are stored in a local
   disk cache on the client computer, increasing performance for
   bandwidth-limited connections.