mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
70 lines
2.4 KiB
Plaintext
70 lines
2.4 KiB
Plaintext
|
$Id: tgafb.txt,v 1.1.2.2 2000/04/04 06:50:18 mato Exp $
|
||
|
|
|
||
|
|
What is tgafb?
|
||
|
|
===============
|
||
|
|
|
||
|
|
This is a driver for DECChip 21030 based graphics framebuffers, a.k.a. TGA
|
||
|
|
cards, which are usually found in older Digital Alpha systems. The
|
||
|
|
following models are supported:
|
||
|
|
|
||
|
|
ZLxP-E1 (8bpp, 2 MB VRAM)
|
||
|
|
ZLxP-E2 (32bpp, 8 MB VRAM)
|
||
|
|
ZLxP-E3 (32bpp, 16 MB VRAM, Zbuffer)
|
||
|
|
|
||
|
|
This version is an almost complete rewrite of the code written by Geert
|
||
|
|
Uytterhoeven, which was based on the original TGA console code written by
|
||
|
|
Jay Estabrook.
|
||
|
|
|
||
|
|
Major new features since Linux 2.0.x:
|
||
|
|
|
||
|
|
* Support for multiple resolutions
|
||
|
|
* Support for fixed-frequency and other oddball monitors
|
||
|
|
(by allowing the video mode to be set at boot time)
|
||
|
|
|
||
|
|
User-visible changes since Linux 2.2.x:
|
||
|
|
|
||
|
|
* Sync-on-green is now handled properly
|
||
|
|
* More useful information is printed on bootup
|
||
|
|
(this helps if people run into problems)
|
||
|
|
|
||
|
|
This driver does not (yet) support the TGA2 family of framebuffers, so the
|
||
|
|
PowerStorm 3D30/4D20 (also known as PBXGB) cards are not supported. These
|
||
|
|
can however be used with the standard VGA Text Console driver.
|
||
|
|
|
||
|
|
|
||
|
|
Configuration
|
||
|
|
=============
|
||
|
|
|
||
|
|
You can pass kernel command line options to tgafb with
|
||
|
|
`video=tgafb:option1,option2:value2,option3' (multiple options should be
|
||
|
|
separated by comma, values are separated from options by `:').
|
||
|
|
Accepted options:
|
||
|
|
|
||
|
|
font:X - default font to use. All fonts are supported, including the
|
||
|
|
SUN12x22 font which is very nice at high resolutions.
|
||
|
|
|
||
|
|
mode:X - default video mode. The following video modes are supported:
|
||
|
|
640x480-60, 800x600-56, 640x480-72, 800x600-60, 800x600-72,
|
||
|
|
1024x768-60, 1152x864-60, 1024x768-70, 1024x768-76,
|
||
|
|
1152x864-70, 1280x1024-61, 1024x768-85, 1280x1024-70,
|
||
|
|
1152x864-84, 1280x1024-76, 1280x1024-85
|
||
|
|
|
||
|
|
|
||
|
|
Known Issues
|
||
|
|
============
|
||
|
|
|
||
|
|
The XFree86 FBDev server has been reported not to work, since tgafb doesn't do
|
||
|
|
mmap(). Running the standard XF86_TGA server from XFree86 3.3.x works fine for
|
||
|
|
me, however this server does not do acceleration, which make certain operations
|
||
|
|
quite slow. Support for acceleration is being progressively integrated in
|
||
|
|
XFree86 4.x.
|
||
|
|
|
||
|
|
When running tgafb in resolutions higher than 640x480, on switching VCs from
|
||
|
|
tgafb to XF86_TGA 3.3.x, the entire screen is not re-drawn and must be manually
|
||
|
|
refreshed. This is an X server problem, not a tgafb problem, and is fixed in
|
||
|
|
XFree86 4.0.
|
||
|
|
|
||
|
|
Enjoy!
|
||
|
|
|
||
|
|
Martin Lucina <mato@kotelna.sk>
|