[an error occurred while processing this directive]
Node:<a name="GRX%20driver">GRX driver</a>,
Next:<a rel=next href="faq10_2.html">Direct access</a>,
Previous:<a rel=previous href="faq10.html">Graphics</a>,
Up:<a rel=up href="faq10.html">Graphics</a>
<br>

<h2>10.1 What GRX driver to use with your SVGA</h2>

<p><em><strong>Q</strong>: Why won't GRX work with my SVGA adapter in any resolution but the
standard VGA?</em>

<br><p>
<p><em><strong>Q</strong>: How do I tell GRX which driver to use with my SVGA?</em>

<br><p>
<p><strong>A</strong>:  In order for GRX to work with your SVGA, you should set the
<code>GRX20DRV</code> environment variable, like this:

<pre>  set GRX20DRV=et4000 gw 1024 gh 768 nc 256
</pre>

<p>To set that variable, you need to know the chip-set on your adapter;
refer to your SVGA documentation.  Currently, GRX supports the
following chip-sets:

<dl>
<dt><code>ati28800</code>
<dd>The ATI 28800 chip-set.

<br><dt><code>cl5426</code>
<dd>Cirrus Logic CL-GD5426 or higher (like CL-GD5428) chip-set.

<br><dt><code>et4000</code>
<dd>Tseng Labs ET4000 chip-set.

<br><dt><code>mach64</code>
<dd>The ATI Mach-64 SVGA.

<br><dt><code>stdega</code>
<dd>The standard EGA adapter.

<br><dt><code>stdvga</code>
<dd>The standard VGA adapter.

<br><dt><code>VESA</code>
<dd>For any VESA-compatible adapter. 
</dl>

<p>After you set the <code>GRX20DRV</code> variable, run <code>modetest.exe</code> to see
what modes you have available.

<p>If your chip-set is not one of the above, try the <code>VESA</code> driver
because many adapters support the VESA BIOS extensions.  If yours
doesn't, try installing a VESA BIOS emulator, like <a href="ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/univbe51.zip">UNIVBE</a>.  The latest
version of UNIVBE and related software is always available <a href="http://www.scitechsoft.com/">from SciTech Web site</a>.

<p><hr>
[an error occurred while processing this directive]