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- OS/2 EGA SUPPORT CONSIDERATIONS
- OS/2 supports pure EGA only (640x350x16 colors). Many OEM EGA adapters on
- the market have a number of EGA enhanced modes (AT&T has a 640x400x16
- colors, Paradise has an EGA 480 adapter). Our drivers do not support any
- of the enhanced modes. Therefore, you should check the boards user manual
- for the hardware/software setting of the adapters video mode. If you
- manage to install OS/2 but get blank areas on the screen, a skewed screen
- or color blotches, this almost certainly indicates that your adapter is no
- t running as pure EGA. If you have made sure that the mode is EGA and the
- problems persist, try disabling VIDEO_BIOS_SHADOW_ENABLE in your
- motherboard BIOS setup. In case that you have trouble installing OS/2,
- please verify that there is no contention for the memory address range
- between the EGA controller and other adapters you may have. If you can't
- detect any contention and the board is not an 8 bit board, try p utting it
- in an 8 bit slot on the bus. When doing that, check the manual for a
- dip-switch setting for 8 bit mode on the board as well. In most cases,
- EGA adapters are 8 bit only. If you did have to install in 8 bit mode,
- you should still be able to put the board back into 16 bit mode after the
- OS/2 installation. Some boards have an auto-switching capability, enabled
- by a hardware switch (or a jumper). This capability MUST be disabled when
- installing and running OS/2. If you're installing on a laptop or a
- notebook computer, please consider calling the technical support
- representative of the laptop manufacturer as laptops are usually not
- equipped nor configured in a standard way. A hardware technician should
- be able to instruct you about the adapter and BIOS configurations and
- different monitor setups. If your DOS application is attempting to set a
- video mode in DOS full screen session and failing to do so, install all
- video related drivers/utilities from your native DOS CONFIG.SYS and
- AUTOEXEC.BAT. You may do that either in CONFIG.SYS and AUTOEXEC.BAT of
- the OS/2v2, or by specifying the DEVICE statements in the DOS_DEVICE entry
- box in the DOS SETTINGS for all of the DOS session icons you are currently
- using. These settings can be invoked by clicking with the right mouse
- button over the DOS session icon in question, stepping on the arrow next
- to the OPEN in the pop-up menu and selecting the SESSION page in the
- notebook. If you are experiencing video loss or crashes when attempting
- to issue DOS MODE command or have problems using your DOS session, please
- call the video board manufacturer and find out whether your video BIOS
- needs an upgrade.
-
- General considerations
- 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 will see this screen shortly after disk 1 has
- been inserted). This will return you to an OS/2 A: command prompt.
- Insert disk 2 in A drive and run A:CHKDSK /F at the C: prompt to repair
- any damages on your drive. Replace C: with your boot drive letter if you
- rs is different.
-
- You should also check your motherboard BIOS date/revision to determine if
- you 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 (they recently corrected a bug
- that was causing problems with OS/2).
-
- Important numbers
- AMI BIOS update: Washburn and Co. 1-800-836-8026
- Phoenix BIOS update: 1-405-321-8333
-
-