1========================================= 2aty128fb - ATI Rage128 framebuffer driver 3========================================= 4 5This is a driver for a graphic framebuffer for ATI Rage128 based devices 6on Intel and PPC boxes. 7 8Advantages: 9 10 * It provides a nice large console (128 cols + 48 lines with 1024x768) 11 without using tiny, unreadable fonts. 12 * You can run XF68_FBDev on top of /dev/fb0 13 * Most important: boot logo :-) 14 15Disadvantages: 16 17 * graphic mode is slower than text mode... but you should not notice 18 if you use same resolution as you used in textmode. 19 * still experimental. 20 21 22How to use it? 23============== 24 25Switching modes is done using the video=aty128fb:<resolution>... modedb 26boot parameter or using `fbset` program. 27 28See Documentation/fb/modedb.rst for more information on modedb 29resolutions. 30 31You should compile in both vgacon (to boot if you remove your Rage128 from 32box) and aty128fb (for graphics mode). You should not compile-in vesafb 33unless you have primary display on non-Rage128 VBE2.0 device (see 34Documentation/fb/vesafb.rst for details). 35 36 37X11 38=== 39 40XF68_FBDev should generally work fine, but it is non-accelerated. As of 41this document, 8 and 32bpp works fine. There have been palette issues 42when switching from X to console and back to X. You will have to restart 43X to fix this. 44 45 46Configuration 47============= 48 49You can pass kernel command line options to vesafb with 50`video=aty128fb:option1,option2:value2,option3` (multiple options should 51be separated by comma, values are separated from options by `:`). 52Accepted options: 53 54========= ======================================================= 55noaccel do not use acceleration engine. It is default. 56accel use acceleration engine. Not finished. 57vmode:x chooses PowerMacintosh video mode <x>. Deprecated. 58cmode:x chooses PowerMacintosh colour mode <x>. Deprecated. 59<XxX@X> selects startup videomode. See modedb.txt for detailed 60 explanation. Default is 640x480x8bpp. 61========= ======================================================= 62 63 64Limitations 65=========== 66 67There are known and unknown bugs, features and misfeatures. 68Currently there are following known bugs: 69 70 - This driver is still experimental and is not finished. Too many 71 bugs/errata to list here. 72 73Brad Douglas <brad@neruo.com> 74