On 08.05.2009 14:31, Andrew Goodbody wrote:
Uwe Hermann wrote:
On Fri, May 08, 2009 at 08:37:15AM +0200, Andy Jakobs wrote:
I also have this board and a NVIDIA 7600GT PCI-E card.
I tested the latest revision a few days ago. Unfortunately there was still no output on the screen after a power-off. So it is no real alternative/replacement for the legacy bios of the board yet.
But console output works.
I have the board here, maybe I find the time to look into it. The issue stems very likely from an incorrect IRQ routing setup, however fixing that is not always trivial unfortunately (and board documentation/datasheets are not available of course).
I doubt it's an IRQ issue. The IRQ was used in CGA/EGA adapters to signal frame sync in order to allow updating of the screen without causing flicker. This has not been an issue since the introduction of the original VGA adapter, IIRC.
Most drivers don't work if interrupt routing is not set up correctly. Many modern graphics cards use interrupts a lot for lots of purposes besides signal frame sync. So far, fixing interrupt routing fixed graphics on lots of boards.
Regards, Carl-Daniel