Cornerstone ImageAccel

@80A5.ADF High Resolution Display
@80A5.ADF DualPage Display (similar, rename to @80A5.ADF)
@80A6.ADF ImageAccel Display

Unofficial Cornerstone ImageAccel site (by Ulrich Trunk, original archived here)

ImageAccel MC161i
ImageAccel MC164
ImageAccel MC1608C/11
Cornerstone Monitors
ADF Sections (80A6)


ImageAccel 1
Win95 and Win3.1x
Win NT 4.0
Win NT 3.51
OS/2 Warp 3.0 and 2.1x

CVC (Whazzat?)
MCA Windows 3.x (Not available)

MC164 (thanks, Brad!)

Don't expect too much, the W95 drivers were just warmed over W3.XX and caused my model 95 to run in DOS mode. Maybe the NT drivers are better, I don't know as I have never tried them. The W95 drivers do support the 6091-19 as a menu option, which is kind of nice. LINK (DEAD)

ImageAccel MC161i

JP1 Monitor Selection
JP30,71 Solder pads
L80 LED (for what?)
P2 DB15 port
U1 50.000 MHz osc
U2 Cornerstone 1212288-200
U12 Motorola 7905CT
U32 MC161i BIOS
U40 Cypress CY7C128A-15VC
U43,44 BI 8A330
U50-55 Solder pads for VRAM
U56,57 TC524256BZ-10
U70 Unknown (under heatsink)
U72,73 Motorola 10H116
U110 CTI 2012371-100
U150-153 Empty
X110 EC2-143 xtal

ImageAccel MC164

1A-1H NEC D42273V-10
3J 131.00 MHz
4J ?
5A L1A4678
8A L1A4220
10J Altera EPB2001LC
11A 438-04ME
13E,13F Motorola 10H116
VR1 Motorola 7905.2CT

This card has 8 NEC D42273V-10 VRAM chips.

ImageAccel MC1608C/11

JP1 monitor type selection
JP12 jumper solder pads
JP30 jumper solder pads (shorted)
LED Green LED (?)
P90 15 pin VGA connector
TP1 MC1608C/11 12660-003 (BIOS)
U1 50 MHz TTL osc
U2 Cornerstone 1212288-200
U50-53,80-83 TC528257J-80
U111 ICS1562AM PLL (pixel clock)
U151,152,155,156 socket artifacts

The MC1608C/11 is a 2 MB graphics card capable of driving fixed frequency monitors. It is no surprise that the Cornerstone monitors of the time (1993/4) are supported, but – pretty surprisingly – also the whole of the 6091 series by IBM.
   Selecting the monitor is done via a set of jumpers in the JP1 position of the card (top right corner).

JP1 Settings

Display Type JP1 Position
1 2 3 4
Autosync on on on on
Cornerstone Color 19 (1) off on off on
IBM 6091-16 and -19i on on off on
IBM 6091-19 on off on on
IBM 6091-23 on off off on
Cornerstone Color 20/70 (2) off off on on
Cornerstone Color 21/76 (3) off on on on

(1) Not supported for ImageAccel 1280 controller
(2) ImageAccel 1600/70 and 1600/76 controllers only
(3) ImageAccel 1600/76 controller only

More info about setup under NT 4.0 at Ulrich Trunk's Unofficial ImageAccel site.

Cornerstone Monitors

CS Fixed Frequency Color Monitors with ImageAccel Video Controllers.
Monitor - Color 21/76, Color 20/70, Color 19

The Color 21/76, Color 20/70 and Color 19) are fixed frequency color monitors. These monitors are not compatible with standard VGA video controllers. Standard VGA video cards require a monitor that operates at 31.5KHz horizontal scan frequency with a 60Hz vertical refresh rate. These monitors have only been tested using the following ImageAccel video controllers.

Color 21/76  ImageAccel 1 - MC 1608C/11 
Color 20/70  ImageAccel 1 - MC 1608C/11, 1608C/12 
Color 19     ImageAccel 1 - MC 1608C/10, 1608C/11, 1608C/12 

AdapterId 80A6 ImageAccel Display

Primary or Secondary Video Adapter
   Choose primary if ImageAccel is the primary display, otherwise choose secondary if VGA is the primary display. (Note: If you select the standard of <Primary> for the video adapter, you’ll see all DOS based messages on the monitor attached to the ImageAccel. <Secondary> means that you use the ImageAccel only for HiRes output (which would require another monitor attached permanently to the BVA).
    <"Primary">, Secondary

I/O base address
   Choose a 2 byte I/O block with no conflicts
    <"2000" (2000-2001)>, 2010 (2010-2011), 4000 (4000-4001), 4010 (4010-4011)

Memory base segment address
   Choose a 8K memory block with no conflicts.
    <"0DE000" (DE00-DFFF)>, 0DC000 (DC00-DDFF), 0DA000 (DA00-DBFF), 0D0000 (D000-D1FF), 0CE000 (CE00-CFFF), 0CC000 (CC00-CDFF), 0CA000 (CA00-CBFF), 0C0000 (C000-C1FF)

Interrupt Selection
   Choose an interrupt with no conflicts.
     <"IRQ 10">, 11, 5, 3

The settings are not critical as long as they don’t conflict with other settings.

Content created and/or collected by:
Louis Ohland, Peter Wendt, David Beem, William Walsh, Tatsuo Sunagawa, Jim Shorney, Tim Clarke, Kevin Bowling, Tomáš Slavotínek, and many others.

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 12 Aug 2022 - Changes & Credits | Legal Info & Contact