
           Orchid Fahrenheit Display Driver Installation Instructions
                               for IBM OS/2 2.1

                              13 September 1993




OS/2 versions supported
-----------------------

This driver release is intended for use with IBM OS/2 2.1 GA (General
Availability). This driver release will not work with any other versions of
OS/2 prior to OS/2 2.1 GA. 



Adapters supported
------------------

This driver release is intended for use with all Orchid Fahrenheit adapters
(ISA & local bus) using the S3 86C911A, 86C911B, 86C924, 86C801 and 86C805
graphics accelerators chipsets. Adapters with 512Kb memory are limited to 640
x 480 x 256 resolution. Memory upgrade kits are available from Orchid
Technology Customer Service Department (510 683 0394).

Use of this driver release with non-Orchid adapters is not supported. Due to
differences between Orchid adapters and non-Orchid adapters, the possibility
exists for hardware damage and system damage if these drivers are used with
any adapters other than the Orchid Fahrenheit 1280, 1280-D, Fahrenheit VA,
1280 Plus, VA/VLB, or the VLB/1280 Plus adapters.



Video Resolutions supported
---------------------------

        1024 x 768 256 colors

         800 x 600 256 colors

         640 x 480 256 colors



Refresh Rates supported
-----------------------

Resolutions     45Hz (interlaced)       56Hz    60Hz    70Hz    72Hz
--------------------------------------------------------------------
1024x768x256     X                               X       X

 800x600x256                             X       X               X

 640x480x256                                     X               X



Orchid Fahrenheit Adapter configuration
---------------------------------------

No special configuration settings are needed.



System configuration
--------------------

Some I/O devices (FAX boards, internal modems, scanner cards, etc.,) use I/O
addresses starting at 2E8 (hexdecimal). If these devices do not properly
decode the full I/O address they can interfere with the function of the
Orchid Fahrenheit adapters and drivers. Reconfigure, disable, or remove any
adapter using I/O addresses starting at 2E8 (hexidecimal).

If the system bus speed has been increased above the 8Mhz standard, reset it
to 8Mhz. (After a successfull installation, the bus speed can be increased
but be prepared, if anomalous behaviour occurs, to lower the bus speed.)



Installation Procedure
----------------------

Before installing new drivers, it is recommended that a full back up of the
OS/2 system partition be performed.

If something should go wrong with the driver installation, instructions for
restoring the video to VGA are to be found in the file README.S3 on the S3
DRVS diskette. 

If the system is not currently configured for VGA, run selective install and
restore the system to VGA, or use the SETVGA.CMD. 



Automatic Installation
----------------------

Please refer to the README.S3 file for the installation instructions.



Enhancements and fixes from prior releases
------------------------------------------

These drivers are derivatives of the IBM/S3 OS/2 2.1 drivers and incorporate
all the features offered by those drivers. These include conformance to the
IBM OS/2 2.1 32-bit architecture, palette management, and automated
installation.



Known Shortcomings or Problems
------------------------------

You need to have the latest BIOS version for the 911 and the 924 chips for the
WINOS2 seamless support. 


Problem Report
--------------

Driver problem reports can be addressed to the Orchid Technical Support
Department by voice phone: 510 683 0323; by FAX (510 683 0379 or 510 683
0355).

If submitting a problem report by voice phone, please have ready a complete
system hardware description along with detailed steps to re-create the
symptoms. If submitting problem report electronically by FAX, please include
a daytime phone number and a best time to call in case Orchid Technical
Support needs more information. 



Warranty Disclaimer
-------------------

The software and documentation may be modified in subsequent releases.
Performance and reliability of this software release may not be at the level
usually associated with Orchid display drivers.
