160 byte framebuffer at 50 fps, internal RAM or external SRAM?

[richard]

I'm doing a graphic project, where content of WS0010b OLED display will be updated really fast, 50fps at least.
The framebuffer size is 160 bytes.

why 160 bytes ? to employ the entire screen area you need 200 bytes in graphics mode

Will PBPs arraywrite/arrayread operations provide enough speed at 18F running at 64mhz

i cannot see anyway that arrayread or arraywrite would be useful in transferring a frame buffer to the display

the displays are very fast, pbp has no trouble uploading a full 200 byte frame to the display in 1.37mS using 4bit parallel interface with the standard built-in lcd routines
plenty fast enough