|VGA(4)||Device Drivers Manual||VGA(4)|
vga — VGA graphics
driver for wscons
vga0 at isa?
vga* at pci?
wsdisplay* at vga?
agp* at vga?
This driver handles VGA graphics hardware within the wscons(4) console framework. It doesn't provide direct device driver entry points but makes its functions available via the internal wsdisplay(4) interface.
vga driver supports multiple virtual
screens on one physical display. The screens allocated on one display can be
of different “types”, where a type refers to various display
properties. The type is determined at the time the virtual screen is created
and can't be changed later. Screens are either created at kernel startup
(then the default type is used) or later with help of the
Currently, the following screen types are supported:
vga driver can display fonts of the
original IBM type and ISO-8859-1 encoded fonts. As an experimental feature,
the “higher half” fonts of the former
OpenBSD/i386 pcvt driver distribution can be used
option WSCONS_SUPPORT_PCVTFONTS was set at
kernel compile time. This is only useful with the “*bf” screen
types; a font containing the ASCII range of characters must be available too
on this screen.
Only a subset of the possible text modes is supported.
VGA cards are supposed to emulate an MDA if a monochrome display is connected. In this case, the device will naturally not support colors at all, but offer the capability to display underlined characters instead. The “80x25bf”, “80x40bf”, “80x50bf”, and “80x24bf” screen types will not be available. This mode of operation is not tested.
|March 16, 2008||OpenBSD-5.1|