C8FDB.ADF - Init file for @8FDB.ADF
190-182 IBM PS/2 XGA Display Adapter/A
XGAUTIL.exe For use by P70/P75 display adapter.
XGAOPT.exe Installs updated (as of '92) SC.EXE, XGA/2, and SCSI, SCSI w/cache ADFs, plus updated *.dgs. For 5565, 5657, 70486, 7080, 7677, 90, 95, P70, P75. For any system with refdisks after 92/93, these files are probably redundant.
xga212.exe XGA/XGA-2 Win3.1/ACAD/DQMS/DOS AI
MSM514262 256Kx4 ZIP
Intro to XGA (INMOS)
INMOS XGA Software Programmer's Guide, Sep 91
INMOS Graphics Databook 2nd Ed, 1990
G190 XGA Serializer Palette DAC
INMOS G200 XGA Display Controller
XGA Adapter /A 75X5887
TC524256BZ-10 or NEC D42274V-10
Different Display Controllers
J5 Function Solder pads for header to supply a base video. This function is performed by the Base Video Extension (BVE) riht below the outline.
W98SE Supports 64K Colors
Yes, folks, I have been to the mountaintop, and it is good. W98SE has built-in support for 640x480 at 16/256/64K colors (finally!) and 1,024x768 at 16/256 colors.
Instance 6 (Address from Video Instance)
IObase 0x2160 (Address from Video Instance)
DACspeed 45 (fixed)
Videoram 1024 (Easy, it's either 512 or 1024)
Clocks 28.322 25.175 41.539 44.9
The XGA card is an entire graphics subsystem that does not have to rely on a video subsystem on the motherboard of the machine where it is installed. The XGA card is a Bus Master, which means it can do its own processing and memory accesses without having to use the main system processor, providing faster video processing and freeing up the main processor for other tasks.
The drivers and the card itself have been optimized to work with the 386 32-bit instruction set. The XGA card comes standard with 512KB of VRAM which provides a maximum resolution of 1024 x 768 with 16 colors. If the memory is upgraded to a full 1MB the maximum increases to 1024 x 768 with 256 colors. The XGA Adapter is upgradeable to 640 x 480 with 65,536 colors (!) and 1024 x 768 with 256 colors by means of the PS/2 Video Memory Expansion Option.
Invalid Aperture on NT
On IBM PS/2 computers with a 16-bit bus, and XGA, the following error message may appear after installing the XGA drivers in Microsoft Windows NT:
"The aperture enabled for the xga device is invalid, please enable the 4MB aperture (preferred) or 1MB aperture using the xga reference disk."
This error occurs on 16 MB 16-bit bus PS/2 computers that support a maximum of 16 MB of RAM, such as the model 9556 or 9557.
XGA Display Adapter/A - Installation instructions
Installation of the XGA card is much like the installation of any other Micro Channel adapter.
First, simply place the card in a Micro Channel expansion slot. A 32-bit slot is preferred, due to the speed advantage. There is however one slot the XGA card will not fit, and that is the slot with the AVE. The XGA card does have an extension that looks much like the 8514/A extension; however, upon closer inspection you will see the extension on this card is positioned differently. The positioning of the XGA extension tab will prevent it from being inserted into the slot with the auxiliary video extension.
The XGA card only occupies 8KB of memory between 640KB and 1MB. Since the XGA card is a Bus Master, it can occupy any 8KB in the "C" or "D" range. To see which part of memory is being used by the XGA card, choose the menu option "Display Memory Map" from the Reference Diskette. Another great feature of the XGA card is that you can have up to six XGA cards installed in one machine (five if the system has XGA already on the motherboard, like the Model 90). To take advantage of multiple adapters, software must be specifically written to do so. If you have an XGA card in a system that has VGA on the system board and a display attached just to the XGA card, the XGA card will function in VGA and high resolution modes. Now, if you have the same setup as before but a display is attached to the motherboard VGA port and another to the XGA card, all VGA (and lower modes) will be displayed on the display attached to the motherboard port. The XGA card will only be used when high resolution is required. You will not get an echo of a VGA image onto the display attached to the XGA port as you would using the 8514/A.
Once the card is installed,
the appropriate device driver must be installed before
the high resolution can be accessed. There are two
device driver diskettes that come with the XGA card. The
first diskette contains all of the device drivers for
DOS, Microsoft Windows 3.0, Microsoft Windows 286 2.1,
and AutoCAD Release 10. The second diskette contains
support for OS/2 1.2 (OS/2 1.3 ships with an XGA
AdapterId 8FDB XGA Display Adapter/A
Video I/O Address
1 MB VRAM Aperture Base
Video Arbitration Level
ADPItem 1 ROM Address Range