Tech Source GFX 400 Series - Manual (Page 21)

Chapter 3 – Software Installation
3-9
To set the resolution to 1024x768x60 with a single TrueColor
visual (no 8-bit PseudoColor visual):
prompt# mkoconfig -res 1024x768x60 \
-24only TRUE
To display the current settings for /dev/fbs/mko0:
prompt# mkoconfig -dev /dev/fbs/mko0 -propt
3.5 Dual-Screen Mode (GFX 450 only)
The GFX 450 has the ability to support two displays - either two
analog displays or one analog and the other DVI (digital). In
either case, the card can be configured so that the two displays
appear as one unified screen to the X Window display. In other
words, windows can be easily moved between the two displays
(without the need for a special "xinerama" mode). This
"unified screen" mode is also called the “Dual Screen”
mode. This is in contrast to what is available on the GFX 420
and GFX 440, where each head serves as an independent X
Window screen and windows cannot be moved between screens
unless the X Server is started up with "Xinerama" enabled.
For the GFX 420 and GFX 440, each of the heads is driven by
an individual graphics processor (GPU) and DAC. However, the
GFX 450 card has only one graphic processor and two DACs.
The drawing engine is capable of driving both DACs. See section
3.5.2 for more details.
3.5.1 GFX 450 Console Display Configuration
In console mode (i.e. prior to starting X Windows ), only one head
will be used. The firmware will determine which head to use
according to the following rules: