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IFB(4)		     OpenBSD Programmer's Manual (SPARC64)		IFB(4)

NAME
     ifb - inextricable frame buffer

SYNOPSIS
     ifb* at pci?
     wsdisplay* at ifb?

DESCRIPTION
     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.

DISPLAY RESOLUTION
     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 output-device screen:r1280x1024x76

     to change to a 76Hz 1280x1024 resolution.

     The ifb frame buffer accepts the following resolutions:

     Mode identifier	Resolution    Refresh

				      Rate (Hz)
     r640x480x60	640x480	      60
     r640x480x60i	640x480	      60	 Composite sync
     r768x575x50i	768x575	      50
     r1024x768x60	1024x768      60	 Composite sync
     r1024x768x70	1024x768      70
     r1024x768x75	1024x768      75
     r1024x768x77	1024x768      77
     r1024x800x84	1024x800      84	 Composite sync
     r1152x900x66	1152x900      66	 Composite sync
     r1152x900x76	1152x900      76	 Composite sync
     r1280x800x76	1280x1024     76
     r1280x1024x60	1280x1024     60
     r1280x1024x67	1280x1024     67	 Composite sync
     r1280x1024x75	1280x1024     75
     r1280x1024x76	1280x1024     76	 Composite sync
     r1280x1024x85	1280x1024     85
     r1440x900x76	1440x900      76	 Composite sync
     r1600x1000x66	1600x1000     66
     r1600x1000x76	1600x1000     76	 Composite sync
     r1600x1280x76	1600x1280     76
     r1792x1344x75	1792x1344     75
     r1920x1080x72	1920x1080     72	 Composite sync
     r1920x1200x70	1920x1200     70
     r1920x1200x75	1920x1200     75

     Modes with the suffix letter `i' are interlaced.

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

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

OpenBSD 4.9		       January 21, 2009			   OpenBSD 4.9

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