Q35 chipset - spanning mode

[fabrice001]

Hi,

I'm software engineer for gamming (slot machine). We are evaluating the Q35 chipset for our new design and I would like to know if it is possible to use it in spanning mode (2 screens 1366 * 768 see as one of 1366 * 1536). If yes, how to do? I can not find documentation about that. We work with Windows XP Embedded SP2



Thanks !

[Chris_M_Intel]

From a theoretical point of view, the number of pixels output by the hardware is determiend by the pixel clocks - it doesn't care if it's spanned or dual view or clone, etc. However, the driver and OS need to support it and that's usually where the problem comes up. I'm not sure if the IEGD drivers (which are used in XP embedded) support the mode you're looking for. If there's no documentation on it, I would bet not.

It sounds like you're trying to do a vertical split-screen. Why not just use extended desktop? (Although it's been a while since I've done anything with XP Embedded, I thought that was supported there...)

Chris

[fabrice001]

Thanks for the reply. I read in the IEGD doc that for win CE you can add the extended vertical mode who is different of the extended desktop, so I presume that with directdraw you see your 2 screens like a "big screen" and you can work with one device attached to this surface in full screen. Meanwhile when you have 2 screen and you want to work with directdraw in full screen on the 2 screen it is more difficult.
In my project I need to use XPE and 2 screen in full screen with directdraw 7 and write the soft to be ready to change the 2 screen with one big, if we write all with one device the day we want to change our 2 screen with one big we only need to adapt the driver and the software is ready

I know that with directx 9 you can work with 2 full screen but we are a small team and we do not have the time to restart all the project. All is working fine with directdraw.

I will try to quickly build a ce application to verify how the driver work with win ce

[delacy__david]

q35 will support these modes as long as you add them or the monitor says it supports them. one issue to look at is XP. XP will only allow hardware accelerated graphics on the primary display while the application is in full screen exclusive mode.

this is when you are in extended desktop or any other single pipe mode

dual display clone should work but not dual display twin or extended