blitting to system RAM from VRAM

Is there a way to blit from VIDE RAM to SYSTEM RAM? I know it is not
a recommended way of doing things, I just wanted to find out if ATI
and NVIDIA card's hardware blitter supports it.

Thanks

postman wrote:
Is there a way to blit from VIDE RAM to SYSTEM RAM? I know it is not
a recommended way of doing things, I just wanted to find out if ATI
and NVIDIA card's hardware blitter supports it.

I'm sure they do, as a lot of their low-range cards seem to use system
memory to increase their video memory size. I think Nvidia calls it
TurboCache, and AMD calls it HyperMemory.

Yousuf Khan