$NetBSD: bochsfb.4,v 1.1 2026/01/31 12:12:58 nia Exp $
Copyright (c) 2025
The NetBSD Foundation, Inc. All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Jiaxun Yang.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
.Dd March 2, 2025 .Dt BOCHSFB 4 .Os .Sh NAME .Nm bochsfb .Nd Bochs Display Interface framebuffer .Sh SYNOPSIS .Cd "bochsfb* at pci?" .Cd "wsdisplay* at bochsfb?" .Ss Options .Cd "options BOCHSFB_DEFAULT_WIDTH=integer" .Cd "options BOCHSFB_DEFAULT_HEIGHT=integer" .Sh DESCRIPTION The .Nm driver provides support for graphics devices implementing the Bochs VBE DISPI interface, including the Bochs reference VGA implementation, and the QEMU StdVGA device. It programs the linear framebuffer through the DISPI registers and makes it available through .Xr wsdisplay 4 as a console or .Xr wsfb 4 compatible framebuffer.
Copyright (c) 2025
The NetBSD Foundation, Inc. All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Jiaxun Yang.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
.Dd March 2, 2025 .Dt BOCHSFB 4 .Os .Sh NAME .Nm bochsfb .Nd Bochs Display Interface framebuffer .Sh SYNOPSIS .Cd "bochsfb* at pci?" .Cd "wsdisplay* at bochsfb?" .Ss Options .Cd "options BOCHSFB_DEFAULT_WIDTH=integer" .Cd "options BOCHSFB_DEFAULT_HEIGHT=integer" .Sh DESCRIPTION The .Nm driver provides support for graphics devices implementing the Bochs VBE DISPI interface, including the Bochs reference VGA implementation, and the QEMU StdVGA device. It programs the linear framebuffer through the DISPI registers and makes it available through .Xr wsdisplay 4 as a console or .Xr wsfb 4 compatible framebuffer.
p When a memory-mapped DISPI bar with an EDID block is present, .Nm uses the preferred mode reported by the display. Devices without EDID support (such as virtio-vga) fall back to a 1024x768 32-bit mode. If no MMIO bar is available, the driver accesses the DISPI registers via the legacy VGA I/O ports. .Sh SEE ALSO .Xr intro 4 , .Xr pci 4 , .Xr vga 4 , .Xr wscons 4 , .Xr wsdisplay 4 .Sh HISTORY The .Nm driver first appeared in .Nx 12.0 . .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Jiaxun Yang Aq Mt jiaxun.yang@flygoat.com .