"Later that year they then released the GMA X4500HD
series and since then we have been waiting for them to push out
public documentation concerning their G45 chipset. Well, Intel has
finally come to the table with this documentation and it is very
extensive. This documentation drop today is split into several
volumes and makes up well over 1,000 pages of Intel hardware
documentation and register descriptions that are available under
the Creative Common Attribution, No Derivative Works license.
"Angela Gill of Intel's Visual Computing Group and Keith Packard
of their Open-Source Technology Center announced the release of the
Intel G45 programmer's reference manual on the X.Org mailing list.
This documentation, which is available via the Intel Linux Graphics