Content by Helmut P. Einfalt, original HERE. Modified by Major Tom.
The MC1608C/11 is a 2 MB
capable of driving fixed frequency monitors. It is no suprise
Cornerstone monitors of the time (1993/4) are supported, but
also the 6091 series by IBM.
I tested the card with a
monitor is based on a 20" Sony Trinitron tube and supports 60
(Mode 1 and
2) or 67 Hz (Mode 3) refresh rates at 1280x1024. The monitor
has a built-in
signal amplifier that allows attaching a second 6091-19 via
the five BNC
Originally, IBM created the
to be driven by the ImageAdapter /A (and later the 6091-19i
and the Image-I-Adapter,
the latter offering more ISA standard refresh rates). Since
there are no
drivers for the IA/A and IA/I Adapters beyond Win311 and as
yet no driver
hack is known to make them work under Win9x, the 6091-19 (and
19i) suffer from lack of capable graphics cards.
While there are several brands
cards capable of delivering the necessary frequency ranges,
the MCA community
was restricted to the use of the ATI Mach32 or the Matrox MGA
both of which are fairly rare and are said to call for some
To my great surprise,
ImageAccel 1 series has native support for the 6091 series
built in. Selecting
the monitor is done via a set of jumpers in the JP1 position
of the card
(top right corner). Refer to the table below for the
Color 19 1
Color 20/70 2
Color 21/76 3
1 Not supported for ImageAccel 1280 controller
2 ImageAccel 1600/70 and 1600/76 controllers only
3 ImageAccel 1600/76 controller only
Installing the card is a
matter, in fact if you install it onto a working NT system,
you'll be through
the whole procedure in half an hour.
I've installed and tested the
in a 9595-ALF (486DX-2/50) with 64 MB of RAM, but other
do as well.
(A) Hardware installation
Step one: Before installing
in the AVE slot (slot 7 -- the only one it will fit), download
from here or from Peter
Wendt's site .
(or any other source; there is
ADF download at Cornerstone's).
Step two: Adjust the jumper
at JP1 to match your 6091 monitor (see table above).
Step three: Provide a Base
for the ImageAccel in the BVE slot (slot 5). Since one of the
states something about known problems with IBM's XGA and XGA/2
I decided to plug in the short SVGA card that is of no use
Attach a monitor to the SVGA
plug in the the ImageAccel (slot 7!) and attach the 6091-19 to
The 6091-19 sould be set to mode 3 (i.e., to 67 Hz refresh).
(BTW, beware of any attempt to
the ImageAccel as standalone-card. Although I found some
somewhere saying that it *can* provide base VGA, this would
option disk that no one has ever seen. The best I could get
the card to
do was to fill the 6091 screen with a nice huge red square --
pretty, but of somewhat limited use for configuring the
Step four: Fire up the engine.
the 165 error comes up, run automatic configuration, feed in
for the video card(s), reboot and -- presto: you'll have the
of seeing the following message at bootup on *both* the
Settings for the ImageAccel
Primary or Secondary Adapter <Primary><Secondary>
I/O base address: <2000><2010><4000><4010>
Memory base segment address: <0C0000><0CA000><0CC000><0CE000>
Interrupt Selection: <IRQ3><IRQ5><IRQ10><IRQ11>
The settings are not critical
as they don't conflict with other settings. For the IRQ I
chose 5, but
that depends on the rest of the machine's setup. If you select
of <Primary> for the video adapter, you'll see all DOS
on the 6091. <Secondary> means that you use the
ImageAccel only for
HiRes output (which would require another monitor attached
to the BVA).
If everything is ok, the next
brings up the following screen message on
"ImageAccel MC1608C/11" plus a
serial number, and
"MEM: C000, I/O: 2000,
(B) SOFTWARE INSTALLATION:
Unless you've already a
install WinNT 4.0 (workstation in my case).
Keeping the control monitor
to the BVA during installation is a good idea:
There are two weird things you
(1) The DOS (text) based
*not* fill the whole of the 6091's surface, and,
(2) once you've got past the
DOS/text-based installation sequence of NT, i.e., when NT
pulls up the
blue graphic background, you'll see everything blue in RED. My
monitor that was attached to the SVGA did behave properly.
Cure: none for (1), and swap
and B BNC plugs at the monitor for (2).
Once NT is up and running **in
VGA mode** (standard driver for vga-compatible graphics card),
it is time
to feed it the ImageAccel NT 4.0 drivers.
You'll find them here
or at the Cornerstone
Take the ImageAccel 1 NT 4.0
and download **NT40_100.zip** to your HD.
Make a directory called NT40
the files into that one. Format a 1.44 floppy and *copy the
onto it. The reason for this move is that the unzipped driver
contains only 1.2 MB of data, but some 140 files, and that you
into a floppy's root directory. (Don't kick me for this
statement of the
obvious -- it took me over an hour and a couple of formats and
of at least three floppies on three different machines before
I found out
why the heck 1.2 MB won't fit on 1.44 MB of free space --
neither NT nor
Win95 are very helpful with their error messages in this
The next step is easy --
reading the following instructions that I copied from the IA
"If the ImageAccel Windows
display driver is being installed for the first time, you
must first start
Windows NT in VGA (640x480) mode before proceeding. If an
without a display/adapter configuration change is being
performed, it is
not necessary to revert back to VGA before installing the
If the display/adapter configuration is changing and an
is being performed, we recommend that you first uninstall
ImageAccel display driver before proceeding.
1. Right click on the
pick "Properties" to bring up the Display Properties window.
2. Select the "Display
A display type dialog box will appear. Select the
"Change..." button in
the "Adapter Type" section of the box.
3. A "Change Display"
will open. Select the "Have Disk..." button. A box will
the drive where the Manufacturer's information is located.
or change to the drive letter and path where the ImageAccel
4. A list of ImageAccel
picks will appear. Select the appropriate controller with
display or timing
and press the "OK" button. The system will inform you that
it will be changing
its configuration. Click "Yes".
5. The operating system
you the display settings have been changed and that for the
take effect, Windows NT should be restarted. You can restart
at that time or later, depending on your needs.
NOTE: Selecting an
display type may distort the screen or bring up the VGA
instead. If this occurs, simply reinstall the correct
display if the display
can be read, otherwise, select the VGA display from the boot
powering up the system.
6. Restart Windows NT.
NOTE: After restarting
a Windows NT "Invalid Display Settings" dialog box will
appear with the
following information: "A new graphics driver has been
installed. The old
default display resolution has been temporarily used by the
the display option in the Windows NT Control Panel to select
Display Resolution." This message is a misleading message
the operating system. Select OK to ignore the message and
7.Choose your desired
the Windows NT Display Properties "Settings" and
"ImageAccel" Pages. Some
changes to the Control Panel default settings require you to
before the changes take effect.
NOTE: (...) Network NT
is not supported. "
While the machine is
step 7, you'll notice that the screen goes back to normal
again, or, if
you *did* swap the R for the B BNC-plug, it will come up with
startup screen. Simply change the plugs again, and there you
now on, the second monitor attached to the SVGA will stop
soon as the blue start screen comes up -- but then -- who
needs a lowly
15-incher if he can have the 6091-19 ?
One more funny thing: the
driver provides cursor color settings -- don't be scared if
comes up in a bright yellow -- there is nothing wrong with it.
the settings in the Display Properties > ImageAccel menu
(and reboot once
And there we are: As far as
is concerned, installation is as easy as anything. And you end
a wonderful combo of a working NT on a 9595 and a nice huuge
Now, if Cornerstone *just*
an upgrade kit to 4 MB (and true color....)
Thanks to Ulrich Trunk for
the card that revived the 6091-19.