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Information for DEC 21030 Users (aka TGA)
The XFree86 Project, Inc.
Updates for X11R7.5 by Jim Gettys
March 25th, 2004
____________________________________________________________
Table of Contents
1. DEC 21030
2. Authors
______________________________________________________________________
1. DEC 21030
o The DEC 21030 is supported by X11R7.5. The driver is now partially
accelerated. The built-in graphics on the Multia is supported in
8-plane mode, and PCI cards with 8 or 16 MB framebuffers are
supported in 24-plane mode. TGA2 (aka PowerStorm 3D30/4D20) cards
are not currently supported.
o Current Known Problems
1. Virtual desktops and multiple modelines do not work. You should
specify only one modeline.
2. Hardware cursor is only supported on systems with the BT485
ramdac, ie the Multia.
3. After the server has been run using the hardware cursor, the
Linux TGA console cursor (which also uses the hardware cursor)
is shifted down by one pixel. This problem does not affect Linux
kernels 2.2.10 and above, which do not use the hardware cursor.
4. The XAA PolySegment() method is buggy. If you experience server
crashes with SIGFPE, or server hangs, try disabling it (see
below).
o The following options may be specified for the 21030 driver:
BusID
Currently it is necessary to specify the BusID so that the
server will find the card. Check /proc/pci and look for the
bus, device, and function numbers in the 21030 section. On a
Multia, this should be "PCI:0:11:0".
MemBase 0x???????
If the server does not detect the base address of the 21030,
then check /proc/pci for the 21030 and look for the
"Prefetchable 32 bit memory at 0x???????" and enter this as your
MemBase setting.
Option
Disables acceleration.
Option
Disables the hardware cursor.
Option
Disables the XAA PolySegment() method.
2. Authors
o Matthew Grossman, <mailto:mattg@oz.net>
o Alan Hourihane, <mailto:alanh@fairlite.demon.co.uk>
o Martin Lucina, <mailto:mato@kotelna.sk>
o Tim Rowley, <mailto:tor@cs.brown.edu>