1============== 2What is tgafb? 3============== 4 5This is a driver for DECChip 21030 based graphics framebuffers, a.k.a. TGA 6cards, which are usually found in older Digital Alpha systems. The 7following models are supported: 8 9- ZLxP-E1 (8bpp, 2 MB VRAM) 10- ZLxP-E2 (32bpp, 8 MB VRAM) 11- ZLxP-E3 (32bpp, 16 MB VRAM, Zbuffer) 12 13This version is an almost complete rewrite of the code written by Geert 14Uytterhoeven, which was based on the original TGA console code written by 15Jay Estabrook. 16 17Major new features since Linux 2.0.x: 18 19 * Support for multiple resolutions 20 * Support for fixed-frequency and other oddball monitors 21 (by allowing the video mode to be set at boot time) 22 23User-visible changes since Linux 2.2.x: 24 25 * Sync-on-green is now handled properly 26 * More useful information is printed on bootup 27 (this helps if people run into problems) 28 29This driver does not (yet) support the TGA2 family of framebuffers, so the 30PowerStorm 3D30/4D20 (also known as PBXGB) cards are not supported. These 31can however be used with the standard VGA Text Console driver. 32 33 34Configuration 35============= 36 37You can pass kernel command line options to tgafb with 38`video=tgafb:option1,option2:value2,option3` (multiple options should be 39separated by comma, values are separated from options by `:`). 40 41Accepted options: 42 43========== ============================================================ 44font:X default font to use. All fonts are supported, including the 45 SUN12x22 font which is very nice at high resolutions. 46 47mode:X default video mode. The following video modes are supported: 48 640x480-60, 800x600-56, 640x480-72, 800x600-60, 800x600-72, 49 1024x768-60, 1152x864-60, 1024x768-70, 1024x768-76, 50 1152x864-70, 1280x1024-61, 1024x768-85, 1280x1024-70, 51 1152x864-84, 1280x1024-76, 1280x1024-85 52========== ============================================================ 53 54 55Known Issues 56============ 57 58The XFree86 FBDev server has been reported not to work, since tgafb doesn't do 59mmap(). Running the standard XF86_TGA server from XFree86 3.3.x works fine for 60me, however this server does not do acceleration, which make certain operations 61quite slow. Support for acceleration is being progressively integrated in 62XFree86 4.x. 63 64When running tgafb in resolutions higher than 640x480, on switching VCs from 65tgafb to XF86_TGA 3.3.x, the entire screen is not re-drawn and must be manually 66refreshed. This is an X server problem, not a tgafb problem, and is fixed in 67XFree86 4.0. 68 69Enjoy! 70 71Martin Lucina <mato@kotelna.sk> 72