Hi,
I've been making progress on my fractal viewer, and am maintaining a wiki of how it all works with my notes and ideas a the project progresses.
I've reached a milestone with my DRAM memory controller and display modules both working, so I can now have byte-per-pixel 640x480 256 colour , 60Hz running out of page mode RAM.
If anybody is interested, the design, source and project notes are available at:
http://ec2-122-248-210-243.ap-southeast-1.compute.amazonaws.com/mediawiki/index.php/Mandelbrot#Display_subsystem
Now on with actually displaying the fractal!