| [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>. Deprecated. | |
| cmode:x - chooses PowerMacintosh colour mode <x>. Deprecated. | |
| <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> |