1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
73 lines
2.1 KiB
Plaintext
73 lines
2.1 KiB
Plaintext
[This file is cloned from VesaFB/matroxfb]
|
|
|
|
What is aty128fb?
|
|
=================
|
|
|
|
This is a driver for a graphic framebuffer for ATI Rage128 based devices
|
|
on Intel and PPC boxes.
|
|
|
|
Advantages:
|
|
|
|
* It provides a nice large console (128 cols + 48 lines with 1024x768)
|
|
without using tiny, unreadable fonts.
|
|
* You can run XF68_FBDev on top of /dev/fb0
|
|
* Most important: boot logo :-)
|
|
|
|
Disadvantages:
|
|
|
|
* graphic mode is slower than text mode... but you should not notice
|
|
if you use same resolution as you used in textmode.
|
|
* still experimental.
|
|
|
|
|
|
How to use it?
|
|
==============
|
|
|
|
Switching modes is done using the video=aty128fb:<resolution>... modedb
|
|
boot parameter or using `fbset' program.
|
|
|
|
See Documentation/fb/modedb.txt for more information on modedb
|
|
resolutions.
|
|
|
|
You should compile in both vgacon (to boot if you remove your Rage128 from
|
|
box) and aty128fb (for graphics mode). You should not compile-in vesafb
|
|
unless you have primary display on non-Rage128 VBE2.0 device (see
|
|
Documentation/fb/vesafb.txt for details).
|
|
|
|
|
|
X11
|
|
===
|
|
|
|
XF68_FBDev should generally work fine, but it is non-accelerated. As of
|
|
this document, 8 and 32bpp works fine. There have been palette issues
|
|
when switching from X to console and back to X. You will have to restart
|
|
X to fix this.
|
|
|
|
|
|
Configuration
|
|
=============
|
|
|
|
You can pass kernel command line options to vesafb with
|
|
`video=aty128fb:option1,option2:value2,option3' (multiple options should
|
|
be separated by comma, values are separated from options by `:').
|
|
Accepted options:
|
|
|
|
noaccel - do not use acceleration engine. It is default.
|
|
accel - use acceleration engine. Not finished.
|
|
vmode:x - chooses PowerMacintosh video mode <x>. Depreciated.
|
|
cmode:x - chooses PowerMacintosh colour mode <x>. Depreciated.
|
|
<XxX@X> - selects startup videomode. See modedb.txt for detailed
|
|
explanation. Default is 640x480x8bpp.
|
|
|
|
|
|
Limitations
|
|
===========
|
|
|
|
There are known and unknown bugs, features and misfeatures.
|
|
Currently there are following known bugs:
|
|
+ This driver is still experimental and is not finished. Too many
|
|
bugs/errata to list here.
|
|
|
|
--
|
|
Brad Douglas <brad@neruo.com>
|