moving memory from one place to another in RAM fast!

Well, does anyone knows how to move a block of memory fast?
And, for a byte per byte moving, how can I do as fast as Windows?
I coded a 8,16,24,32 bit x what_ever_resolution_you_got and the pixel moving seems to be very slow. So I use 32 bit but it will plot two pixels at a time for 16 bit colors. What should I do so that it can be as fast as Windows' DVA (Direct Video Access)?

Hope you brilliant guyz can help me!

Didnt you already post this question? If you did, could you delete this one and post in the other thread to bring it up front? That way we know what we've already giving you.