.\"	$OpenBSD: ifb.4,v 1.6 2009/01/21 17:03:13 miod Exp $
.\"
.\" Copyright (c) 2008 Miodrag Vallat.
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies. And
.\" I won't mind if you keep the disclaimer below.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: January 21 2009 $
.Dt IFB 4 sparc64
.Os
.Sh NAME
.Nm ifb
.Nd inextricable frame buffer
.Sh SYNOPSIS
.Cd "ifb* at pci?"
.Cd "wsdisplay* at ifb?"
.Sh DESCRIPTION
The
.Nm
driver attempts to support various frame buffer cards based on the
3DLabs
.Sq 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
.Xr wsdisplay 4
interface.
.Sh DISPLAY RESOLUTION
If the
.Nm
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:
.Pp
.Em \   ok
setenv
.Em output-device
screen:r1280x1024x76
.Pp
to change to a 76Hz 1280x1024 resolution.
.Pp
The
.Nm
frame buffer accepts the following resolutions:
.Bl -column "Mode identifier" "Resolution" "Refresh" ""
.It Li Mode identifier Ta Resolution Ta Refresh
.It Li "" Ta "" Ta "Rate (Hz)"
.It Li r640x480x60 Ta 640x480 Ta 60
.It Li r640x480x60i Ta 640x480 Ta 60 Ta Composite sync
.It Li r768x575x50i Ta 768x575 Ta 50
.It Li r1024x768x60 Ta 1024x768 Ta 60 Ta Composite sync
.It Li r1024x768x70 Ta 1024x768 Ta 70
.It Li r1024x768x75 Ta 1024x768 Ta 75
.It Li r1024x768x77 Ta 1024x768 Ta 77
.It Li r1024x800x84 Ta 1024x800 Ta 84 Ta Composite sync
.It Li r1152x900x66 Ta 1152x900 Ta 66 Ta Composite sync
.It Li r1152x900x76 Ta 1152x900 Ta 76 Ta Composite sync
.\" .It Li r1280x768x56 Ta 1280x768 Ta 56
.It Li r1280x800x76 Ta 1280x1024 Ta 76
.It Li r1280x1024x60 Ta 1280x1024 Ta 60
.It Li r1280x1024x67 Ta 1280x1024 Ta 67 Ta Composite sync
.It Li r1280x1024x75 Ta 1280x1024 Ta 75
.It Li r1280x1024x76 Ta 1280x1024 Ta 76 Ta Composite sync
.It Li r1280x1024x85 Ta 1280x1024 Ta 85
.It Li r1440x900x76 Ta 1440x900 Ta 76 Ta Composite sync
.It Li r1600x1000x66 Ta 1600x1000 Ta 66
.It Li r1600x1000x76 Ta 1600x1000 Ta 76 Ta Composite sync
.It Li r1600x1280x76 Ta 1600x1280 Ta 76
.It Li r1792x1344x75 Ta 1792x1344 Ta 75
.It Li r1920x1080x72 Ta 1920x1080 Ta 72 Ta Composite sync
.It Li r1920x1200x70 Ta 1920x1200 Ta 70
.It Li r1920x1200x75 Ta 1920x1200 Ta 75
.El
.Pp
Modes with the suffix letter
.Sq i
are interlaced.
.Sh SEE ALSO
.Xr intro 4 ,
.Xr pci 4 ,
.Xr wscons 4 ,
.Xr wsdisplay 4
.Sh BUGS
The second head of XVR-1200 cards is not supported.