[libre-riscv-dev] Wishbone Arbiter

[Michael Nolan]

> a temporary video blip is much better than crashing due to corrupted ram.

I think it's not unreasonable to have the display controller be a little
tolerant of latency. Since the access pattern is very regular, having it
prefetch into a buffer of $MAXLATENCY * $PIXELFREQUENCY pixels would be
relatively straightforward. It would also mean the DRAM controller
wouldn't have to worry about initiating a refresh right before the
display controller initiates a read. 

-- Michael