linux/Documentation/fb/tgafb.txt
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   1$Id: tgafb.txt,v 1.1.2.2 2000/04/04 06:50:18 mato Exp $
   2
   3What is tgafb?
   4===============
   5
   6This is a driver for DECChip 21030 based graphics framebuffers, a.k.a. TGA
   7cards, which are usually found in older Digital Alpha systems. The
   8following models are supported:
   9
  10ZLxP-E1 (8bpp, 2 MB VRAM)
  11ZLxP-E2 (32bpp, 8 MB VRAM)
  12ZLxP-E3 (32bpp, 16 MB VRAM, Zbuffer)
  13
  14This version is an almost complete rewrite of the code written by Geert
  15Uytterhoeven, which was based on the original TGA console code written by
  16Jay Estabrook.
  17
  18Major new features since Linux 2.0.x:
  19
  20 * Support for multiple resolutions
  21 * Support for fixed-frequency and other oddball monitors 
  22   (by allowing the video mode to be set at boot time)
  23
  24User-visible changes since Linux 2.2.x:
  25
  26 * Sync-on-green is now handled properly
  27 * More useful information is printed on bootup
  28   (this helps if people run into problems)
  29
  30This driver does not (yet) support the TGA2 family of framebuffers, so the
  31PowerStorm 3D30/4D20 (also known as PBXGB) cards are not supported. These
  32can however be used with the standard VGA Text Console driver.
  33
  34
  35Configuration
  36=============
  37
  38You can pass kernel command line options to tgafb with
  39`video=tgafb:option1,option2:value2,option3' (multiple options should be
  40separated by comma, values are separated from options by `:').
  41Accepted options:
  42
  43font:X    - default font to use. All fonts are supported, including the
  44            SUN12x22 font which is very nice at high resolutions.
  45
  46mode:X    - default video mode. The following video modes are supported:
  47            640x480-60, 800x600-56, 640x480-72, 800x600-60, 800x600-72, 
  48            1024x768-60, 1152x864-60, 1024x768-70, 1024x768-76,
  49            1152x864-70, 1280x1024-61, 1024x768-85, 1280x1024-70,
  50            1152x864-84, 1280x1024-76, 1280x1024-85
  51 
  52
  53Known Issues
  54============
  55
  56The XFree86 FBDev server has been reported not to work, since tgafb doesn't do
  57mmap(). Running the standard XF86_TGA server from XFree86 3.3.x works fine for
  58me, however this server does not do acceleration, which make certain operations
  59quite slow. Support for acceleration is being progressively integrated in
  60XFree86 4.x.
  61
  62When running tgafb in resolutions higher than 640x480, on switching VCs from
  63tgafb to XF86_TGA 3.3.x, the entire screen is not re-drawn and must be manually
  64refreshed. This is an X server problem, not a tgafb problem, and is fixed in
  65XFree86 4.0.
  66
  67Enjoy!
  68
  69Martin Lucina <mato@kotelna.sk>
  70
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