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+$Id: pvr2fb.txt,v 1.1 2001/05/24 05:09:16 mrbrown Exp $
+
+What is pvr2fb?
+===============
+
+This is a driver for PowerVR 2 based graphics frame buffers, such as the
+one found in the Dreamcast.
+
+Advantages:
+
+ * It provides a nice large console (128 cols + 48 lines with 1024x768)
+ without using tiny, unreadable fonts (NOT on the Dreamcast)
+ * You can run XF86_FBDev on top of /dev/fb0
+ * Most important: boot logo :-)
+
+Disadvantages:
+
+ * Driver is largely untested on non-Dreamcast systems.
+
+Configuration
+=============
+
+You can pass kernel command line options to pvr2fb with
+`video=pvr2fb:option1,option2:value2,option3' (multiple options should be
+separated by comma, values are separated from options by `:').
+Accepted options:
+
+font:X - default font to use. All fonts are supported, including the
+ SUN12x22 font which is very nice at high resolutions.
+
+
+mode:X - default video mode with format [xres]x[yres]-<bpp>@<refresh rate>
+ The following video modes are supported:
+ 640x640-16@60, 640x480-24@60, 640x480-32@60. The Dreamcast
+ defaults to 640x480-16@60. At the time of writing the
+ 24bpp and 32bpp modes function poorly. Work to fix that is
+ ongoing
+
+ Note: the 640x240 mode is currently broken, and should not be
+ used for any reason. It is only mentioned here as a reference.
+
+inverse - invert colors on screen (for LCD displays)
+
+nomtrr - disables write combining on frame buffer. This slows down driver
+ but there is reported minor incompatibility between GUS DMA and
+ XFree under high loads if write combining is enabled (sound
+ dropouts). MTRR is enabled by default on systems that have it
+ configured and that support it.
+
+cable:X - cable type. This can be any of the following: vga, rgb, and
+ composite. If none is specified, we guess.
+
+output:X - output type. This can be any of the following: pal, ntsc, and
+ vga. If none is specified, we guess.
+
+X11
+===
+
+XF86_FBDev has been shown to work on the Dreamcast in the past - though not yet
+on any 2.6 series kernel.
+
+--
+Paul Mundt <lethal@linuxdc.org>
+Updated by Adrian McMenamin <adrian@mcmen.demon.co.uk>
+