16 X 64 SCROLLING LED MATRIX

google "addressable latch"

e.g

You can use an addressable LED driver IC like this one from Texas Instruments:

Data is fed in serially and they can be individually addressed with PWM brightness control for each LED, and daisy chained to create larger arrays. They come in different number of output channels per chip, too. there's likely maximum number of individual ICs that can be daisy-chained before clock skew becomes a problem.

If you only need on/off then scanning a row/column arrangement with addressable latches would work as another poster suggested:

would also need a high-side driver.

Controlling a large billboard-like array that can do colors and full-motion video is a non-trivial project, but a scrolling message board for text doesn't require a high data rate.

If spinning the display is an option you can greatly reduce the electronics.

NT

Thank you everyone, I am going to try all ya suggestions

I'm sure an operating system could help there.