1*4882a593Smuzhiyun============== 2*4882a593SmuzhiyunWhat is tgafb? 3*4882a593Smuzhiyun============== 4*4882a593Smuzhiyun 5*4882a593SmuzhiyunThis is a driver for DECChip 21030 based graphics framebuffers, a.k.a. TGA 6*4882a593Smuzhiyuncards, which are usually found in older Digital Alpha systems. The 7*4882a593Smuzhiyunfollowing models are supported: 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun- ZLxP-E1 (8bpp, 2 MB VRAM) 10*4882a593Smuzhiyun- ZLxP-E2 (32bpp, 8 MB VRAM) 11*4882a593Smuzhiyun- ZLxP-E3 (32bpp, 16 MB VRAM, Zbuffer) 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunThis version is an almost complete rewrite of the code written by Geert 14*4882a593SmuzhiyunUytterhoeven, which was based on the original TGA console code written by 15*4882a593SmuzhiyunJay Estabrook. 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunMajor new features since Linux 2.0.x: 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun * Support for multiple resolutions 20*4882a593Smuzhiyun * Support for fixed-frequency and other oddball monitors 21*4882a593Smuzhiyun (by allowing the video mode to be set at boot time) 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunUser-visible changes since Linux 2.2.x: 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun * Sync-on-green is now handled properly 26*4882a593Smuzhiyun * More useful information is printed on bootup 27*4882a593Smuzhiyun (this helps if people run into problems) 28*4882a593Smuzhiyun 29*4882a593SmuzhiyunThis driver does not (yet) support the TGA2 family of framebuffers, so the 30*4882a593SmuzhiyunPowerStorm 3D30/4D20 (also known as PBXGB) cards are not supported. These 31*4882a593Smuzhiyuncan however be used with the standard VGA Text Console driver. 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun 34*4882a593SmuzhiyunConfiguration 35*4882a593Smuzhiyun============= 36*4882a593Smuzhiyun 37*4882a593SmuzhiyunYou can pass kernel command line options to tgafb with 38*4882a593Smuzhiyun`video=tgafb:option1,option2:value2,option3` (multiple options should be 39*4882a593Smuzhiyunseparated by comma, values are separated from options by `:`). 40*4882a593Smuzhiyun 41*4882a593SmuzhiyunAccepted options: 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun========== ============================================================ 44*4882a593Smuzhiyunfont:X default font to use. All fonts are supported, including the 45*4882a593Smuzhiyun SUN12x22 font which is very nice at high resolutions. 46*4882a593Smuzhiyun 47*4882a593Smuzhiyunmode:X default video mode. The following video modes are supported: 48*4882a593Smuzhiyun 640x480-60, 800x600-56, 640x480-72, 800x600-60, 800x600-72, 49*4882a593Smuzhiyun 1024x768-60, 1152x864-60, 1024x768-70, 1024x768-76, 50*4882a593Smuzhiyun 1152x864-70, 1280x1024-61, 1024x768-85, 1280x1024-70, 51*4882a593Smuzhiyun 1152x864-84, 1280x1024-76, 1280x1024-85 52*4882a593Smuzhiyun========== ============================================================ 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun 55*4882a593SmuzhiyunKnown Issues 56*4882a593Smuzhiyun============ 57*4882a593Smuzhiyun 58*4882a593SmuzhiyunThe XFree86 FBDev server has been reported not to work, since tgafb doesn't do 59*4882a593Smuzhiyunmmap(). Running the standard XF86_TGA server from XFree86 3.3.x works fine for 60*4882a593Smuzhiyunme, however this server does not do acceleration, which make certain operations 61*4882a593Smuzhiyunquite slow. Support for acceleration is being progressively integrated in 62*4882a593SmuzhiyunXFree86 4.x. 63*4882a593Smuzhiyun 64*4882a593SmuzhiyunWhen running tgafb in resolutions higher than 640x480, on switching VCs from 65*4882a593Smuzhiyuntgafb to XF86_TGA 3.3.x, the entire screen is not re-drawn and must be manually 66*4882a593Smuzhiyunrefreshed. This is an X server problem, not a tgafb problem, and is fixed in 67*4882a593SmuzhiyunXFree86 4.0. 68*4882a593Smuzhiyun 69*4882a593SmuzhiyunEnjoy! 70*4882a593Smuzhiyun 71*4882a593SmuzhiyunMartin Lucina <mato@kotelna.sk> 72