I have found the datasheet for this controller, it is indeed mostly Philips compatible but adds several extra commands including DRAM read (2E). It also has 4 less SEG/COM outputs (maximum 128x128), but supports true 64k (5-6-5) color and defaults to this mode on reset.
http://www.mediafire.com/?2eq37o1rr9azxe3
Please enjoy responsibly.
