IFB(4) Device Drivers Manual (sparc64) IFB(4)

ifbinextricable frame buffer

ifb* at pci?
wsdisplay* at ifb?

The ifb driver attempts to support various frame buffer cards based on the 3DLabs ‘Wildcat’ chips, such as the Sun Expert3D-Lite, Expert3D, XVR-500, XVR-600 and XVR-1200 boards. It does not provide direct device driver entry points but makes its functions available via the internal wsdisplay(4) interface.

If the ifb frame buffer is used as the console display, a different resolution than the default 1152x900 can be selected by changing the OpenPROM environment. To change the default resolution, type the following:

  ok setenv screen:r1280x1024x76

to change to a 76Hz 1280x1024 resolution.

The ifb frame buffer accepts the following resolutions:

640x480 60
640x480 60 Composite sync
768x575 50
1024x768 60 Composite sync
1024x768 70
1024x768 75
1024x768 77
1024x800 84 Composite sync
1152x900 66 Composite sync
1152x900 76 Composite sync
1280x1024 76
1280x1024 60
1280x1024 67 Composite sync
1280x1024 75
1280x1024 76 Composite sync
1280x1024 85
1440x900 76 Composite sync
1600x1000 66
1600x1000 76 Composite sync
1600x1280 76
1792x1344 75
1920x1080 72 Composite sync
1920x1200 70
1920x1200 75

Modes with the suffix letter ‘i’ are interlaced.

intro(4), pci(4), wscons(4), wsdisplay(4)

The second head of XVR-1200 cards is not supported.

September 3, 2011 OpenBSD 7.5