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	Resolution	Refresh
Identifier		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.