Why & How to do???

Why & How to do???

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Posted by kw119 on May 10, 2001 at 07:38:09:

Hi, everyone:
Im a newbie for DDK. I want to write a my driver(miniport & display) for Trident 9880 for Win2000.
In the func "FindAdapter", VideoPortGetAccessRange() return FB=0xff000000, IO=0xffee0000, VideoAperture=0xfe800000, then use VideoPortGetDeviceBase() to map the device space to system space, yes, it return 0xf68aa000(IO), 0xf608000(FB), but the mem space mapped can't be write in or read out, it is always "ff ff ff...", why?
I think it's possible for NOT initialized SGRAM, but what about the IO space??
How I to do??

Thanks for any advice!!

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