Using Zenith TurbosPorts with Windows

Last reviewed: November 21, 1994
Article ID: Q85119

The information in this article applies to:

Microsoft Windows operating system versions 3.0, 3.0a, 3.1, 3.11

SYMPTOMS

If you attempt to run MS-DOS-based applications under Microsoft Windows version 3.0 or 3.1 in standard or 386 enhance mode on a Zenith TurbosPort 386 (CGA), you may receive the following error message:

   386 Display Type Mismatch

WORKAROUND

To work around this problem, you can either obtain a modified version of the CGA virtual display driver (VDDCGA.386) from Zenith, or attempt to use the CGA Plasma video grabber.

MORE INFORMATION

To Obtain an Modified Version of VDDCGA.386

A modified version of the VDDCGA.386 driver is available from the Zenith bulletin board (BBS). After you have downloaded the driver, it should be copied to your WINDOWS\SYSTEM directory.

Using the Windows Plasma CGA Video Display Grabber

If you are not already using the CGA video drivers, run Setup from the WINDOWS directory and change the Display entry to CGA.
Using a text editor, edit the SYSTEM.INI file.
Change the [Boot] section. Change the 386grabber= setting from CGA.GR3 to PLASMA.GR3 for Windows 3.0 or PLASMA.3GR for Windows 3.1, as in the following example:
```
      386grabber=plasma.gr3
```
```
         -or-

      386grabber=plasma.3gr
```
If you are using Windows 3.0, expand the PLASMA.GR3 file from the Windows disks as follows:
```
      expand a:plasma.gr_ c:\WINDOWS\SYSTEM\plasma.gr3
```
The driver is located on Disk 4 for 5.25-inch disks, and Disk 5 for 3.5-inch disks.
If you are using Windows 3.1, the file is called PLASMA.3GR. Expand the PLASMA.GR3 file from the Windows 3.1 disk number 2 as follows:
```
      expand a:plasma.3g_ c:\WINDOWS\SYSTEM\plasma.3gr
```
The driver is located on Disk 2 for both the 5.25-inch disks and 3.5-inch disks.

BIOS Upgrade May Be Required

The TurbosPort 386 (CGA) ships with a BIOS version of 2.4, but requires a BIOS upgrade to 2.4D or later to run Windows properly. However, the BIOS upgrade will not affect the problem described above. The latest version is 2.7B; the chip number is 44465103.

MS-DOS Versions

The TurbosPort computers will run Windows with MS-DOS version 3.1. To run the Zenith version of Windows, you need the Zenith version of MS-DOS 3.3 or later.

KBCategory: kbusage kbdisplay kb3rdparty kbhw
KBSubcategory: win31 win30
Additional reference words: laptop 3.10 3.00 3.00a 3.11 turbo sport vdd

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Last reviewed: November 21, 1994
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