This program will turn on Linear Video and VGA video write combining, and
CPU to PCI bus write posting on Intel 82450 Orion chipset systems.

If you have an A2 level Orion chipset you should not use this utility, since
Intel claims that data corruption can occur if you use Write posting
on an A2 chipset.

This utility has only been tested with matrox Millenium graphics cards.

The linear PCI video space is assumed to be at a fixed address,
there are 3 versions of the device driver, load only the
one for your cards video memory amount (2,4 or 8MB)

USE AT YOUR OWN RISK.

The pgm was originally written for DOS by John Hinkley on Compuserve,
ported to OS/2 form by Roger Uzun (uzun@cts.com)
Copy the appropriate p6fsvdX.sys file into your OS/2 boot
partitions \OS2 directory to start.

To use the pgm you need to load the appropriate device driver by adding the
following line in your config.sys

For 2MB Matrox Millenium cards
DEVICE=\OS2\p6fsvid2.sys

For 4MB Matrox Millenium cards
DEVICE=\OS2\p6fsvid4.sys

For 8MB cards
DEVICE=\OS2\p6fsvid8.sys


Once you have the appropriate .sys file in your \os2
directory, and have loaded it in your config.sys file
and rebooted, you need to run the fstorion.exe program
in order to activate the orion features.  You
can make an icon for it and put it in your startup
folder, or run it from a command line.

You need to run fstorion.exe from an OS/2 shell
or an icon before the speedup will be activated!

To test the speed-up you can open a FULL SCREEN
DOS session and run the program profile.exe 
provided.  If you run Profile 101 it will
test the video memory in the VGA address
space.  Running Profile 4101 tests the video
speed in the PCI address space.  On my machine
the results before running fstorion.exe are
about 18MB/sec on each.  The mode 101
goes up to 69MB/sec and the 4101 goes up
to 89mb/sec once I have loaded the driver
and run fstorion.exe

In all my tests it does not seem to speed
up native OS/2 gfx operations, I am not
sure why. (Well it will speed them up
a lot if you did not have write posting
enabled before, but the write combining does
not speed things up over the write posting)


-Roger