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- File:TRIDENT.FAX
-
- TRIDENT VIDEO CARDS
-
- TRIDENT high resolution video adapters based on 8900B and 8900C chipsets.
-
- If video synch problems exist in an OS/2 full screen session or desktop
- but go away temporarily after a DOS full screen session is entered, make
- sure that you have executed SVGA ON from a DOS full screen session and
- performed a shutdown. Prior to executing g this command, search for a file
- \OS2\SVGDATA.PMI. If the file exists, delete it and regenerate it by
- executing SVGA ON from a DOS command prompt. Some monitors cannot sync
- under default video parameter settings. Some can sync but the picture s
- shifted to one side of the screen. Other monitors support high refresh
- rates, that reduces flickering (like 70 Hz vertical frequency). To get
- the best display result, you may want to go through the following
- procedures to adjust video parameters.
-
- . Boot OS/2 with the default DISPLAY.DLL (640x480-16).
- . Use the TVGACRTC.EXE utility (on TVGA Driver/Utility Diskettes, also
- available from Trident BBS) under OS/2 DOS FULL SCREEN.. It will
- generate TVGACRTC.SYS file and insert a line
- DEVICE=path\TVGACRTC.SYS in the CONFIG.SYS.
- . Shutdown OS/2 and reboot the system.
- . Remove \OS2\SVGADATA.PMI file if it exists.
- . Open a DOS full screen and run SVGA ON. This will generate a
- "corrected" .PMI file.
- . Remove DEVICE=TVGACRTC.SYS statement from CONFIG.SYS
- . Shutdown OS/2 and boot again.
-
- SVGDATA.PMI file contains the register information for video modes
- supported by your adapter and is used by two drivers: BSVHSVGA.DLL in
- OS/2 full screen and by VSVGA.SYS in DOS full screen. Correct video
- driver statements in the CONFIG.SYS for SVGA support should be as
- follows:
-
- SET VIO_VGA=DEVICE(BVHVGA, BVHSVGA)
- DEVICE=x:\OS2\MDOS\VSVGA.SYS where x is your OS/2 system drive letter.
-
- If you have a problem with 8900B when opening a DOS full screen, try the
- Trident fix 8900BFIX. This is a temporary solution and might not fix your
- specific problem. Trident is working on newer VSVGA.SYS to fix it. You
- may obtain this fix from Trident's BBS.
-
- If you have intermittent video problems using DOS full screen session or
- get error SYS3176 when opening DOS session, set DOS settings for that
- icon as follows:
-
- HW_ROM_TO_RAM to ON,
- DOS_RMSIZE to 624.
-
- Settings screen can be reached by clicking with the right mouse button
- over the icon, selecting "Open settings" and going to the "Session" page
- in the notebook.
-
- General considerations
- Our PM desktop device driver supports only 640x480x16 mode (pure VGA).
- SVGA support is intended to provide higher resolution modes for DOS and
- VIO applications only! Trident has developed a number of different
- high-resolution PM display drivers. They are available from Trident's
- BBS. If you have installed one and are experiencing problems with the
- video, please contact Trident for technical support. You can obtain more
- information on SVGA support from the README file ( in INFORMATION folder)
- . In case that you are not interested in running high-resolution, you may
- specify VGA support in your CONFIG.SYS. Basic VGA OS/2 support statements
- in CONFIG.SYS VGA should be as follows:
-
- SET VIO_VGA=DEVICE(BVHVGA)
- DEVICE=x:\OS2\MDOS\VVGA.SYS where x is your OS/2 system drive letter.
-
- If your desktop video is corrupted intermittently, run CHKDSK from an OS/2
- command prompt to determine if any hard disk problems exist. If so, boot
- OS/2 from the installation disk and press ESC when the first instruction
- screen is displayed (you'll see this screen shortly after disk 1 has been
- inserted). This will return you to an OS/2 A: command prompt. Run
- CHKDSK C: /F to repair any inconsistencies on your drive. Replace C:
- with your boot drive letter if yours is different.
-
- Using HPFS on systems with less than 6MB RAM sometimes causes problems
- that seem to be video related but are not (blank screen, missing icons,
- etc...). You may want to consider a FAT file system for your hard drive
- if you experience problems.
-
- You should also check your motherboard BIOS date to determine if you will
- need an update. AMI BIOS should be dated no earlier than 4/9/90 although
- we recommend using AMI BIOS dated 5/9/91 or later. Phoenix BIOS should be
- dated no earlier than 5/11/92 (t hey recently corrected a bug that was
- causing problems with OS/2).
-
- If your DOS application is using a video mode which is not supported by
- our DOS full screen drivers, you may install all DOS video related drivers
- and mode utilities in OS/2 CONFIG.SYS and AUTOEXEC.BAT. You may also
- specify DOS video driver DEVICE statement in DOS_DEVICE setting in the
- DOS SETTINGS for the desired DOS session.
-
- Important numbers
- AMI BIOS update: Washburn and Co. 1-800-836-8026
- Phoenix BIOS update: 1-405-321-8333
- Trident:1-415-691-9211
- Trident's BBS: 1-415-691-1016
-