Getting display information through DDC

Can anyone here point me to some examples (preferrable including code) of how
to retrieve display information through DDC?

Since DDC calls happen in RTM, they are not supposed to be allowed in
Windows protected mode as I understand it. People say, it is necessary to
create a driver for this. I would need an example of how to do this, since I
am not exactly a driver expert ;-)

Any help would be much appreciated!
Best Regards,
Christian.

Calvin
Mon Apr 25 08:29:05 CDT 2005

See
http://groups.google.ca/groups?hl=en&lr=&selm=%235ikTsxeEHA.1036%40TK2MSFTNGP10.phx.gbl&rnum=3

--
Calvin Guan
Windows DDK MVP

"Christian Jacob" <cjacob AT nospam toptechnologies DOT de> wrote in message
news:4B32D2CA-B517-430B-B16A-2C0A6988564D@microsoft.com...
> Can anyone here point me to some examples (preferrable including code) of
how
> to retrieve display information through DDC?
>
> Since DDC calls happen in RTM, they are not supposed to be allowed in
> Windows protected mode as I understand it. People say, it is necessary to
> create a driver for this. I would need an example of how to do this, since
I
> am not exactly a driver expert ;-)
>
> Any help would be much appreciated!
> Best Regards,
> Christian.

cjacob
Mon Apr 25 08:44:01 CDT 2005

Hi Calvin,

the code, you are referring to actually reads out the EDID block stored by
Windows into the registry. I would like to read it out by myself.

Any hints?

-Christian.

"Calvin Guan" wrote:

> See
> http://groups.google.ca/groups?hl=en&lr=&selm=%235ikTsxeEHA.1036%40TK2MSFTNGP10.phx.gbl&rnum=3
>
> --
> Calvin Guan
> Windows DDK MVP
>
> "Christian Jacob" <cjacob AT nospam toptechnologies DOT de> wrote in message
> news:4B32D2CA-B517-430B-B16A-2C0A6988564D@microsoft.com...
> > Can anyone here point me to some examples (preferrable including code) of
> how
> > to retrieve display information through DDC?
> >
> > Since DDC calls happen in RTM, they are not supposed to be allowed in
> > Windows protected mode as I understand it. People say, it is necessary to
> > create a driver for this. I would need an example of how to do this, since
> I
> > am not exactly a driver expert ;-)
> >
> > Any help would be much appreciated!
> > Best Regards,
> > Christian.
>
>
>

Maxim
Mon Apr 25 10:02:46 CDT 2005

I don't think Windows support this. All EDID-related stuff in Windows is
limited to a couple of calls to the video miniport driver.

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com

"Christian Jacob" <cjacob AT nospam toptechnologies DOT de> wrote in message
news:D0C73102-6678-46A7-8153-558219ECF0A7@microsoft.com...
> Hi Calvin,
>
> the code, you are referring to actually reads out the EDID block stored by
> Windows into the registry. I would like to read it out by myself.
>
> Any hints?
>
> -Christian.
>
> "Calvin Guan" wrote:
>
> > See
> >
http://groups.google.ca/groups?hl=en&lr=&selm=%235ikTsxeEHA.1036%40TK2MSFTNGP10.phx.gbl&rnum=3
> >
> > --
> > Calvin Guan
> > Windows DDK MVP
> >
> > "Christian Jacob" <cjacob AT nospam toptechnologies DOT de> wrote in
message
> > news:4B32D2CA-B517-430B-B16A-2C0A6988564D@microsoft.com...
> > > Can anyone here point me to some examples (preferrable including code) of
> > how
> > > to retrieve display information through DDC?
> > >
> > > Since DDC calls happen in RTM, they are not supposed to be allowed in
> > > Windows protected mode as I understand it. People say, it is necessary to
> > > create a driver for this. I would need an example of how to do this,
since
> > I
> > > am not exactly a driver expert ;-)
> > >
> > > Any help would be much appreciated!
> > > Best Regards,
> > > Christian.
> >
> >
> >

Tim
Wed Apr 27 01:01:03 CDT 2005

Christian Jacob <cjacob AT nospam toptechnologies DOT de> wrote:
>
>the code, you are referring to actually reads out the EDID block stored by
>Windows into the registry. I would like to read it out by myself.

Why? Do you not trust the display driver?
--
- Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc