That mego sea battle has another unknown hughes LCD driver chip in it, too. I'm sure I can easily RE how it works by examining the 8048 code if/when I can dump it. Seems to be similar to the microvision chip, just a different resolution. 20*14 or so pixels but only 20*13 are hooked up. There's an NC pin on the chip in the middle of the LCD driver pins so it's possible it's a 34 output chip.
Pins 1-6 are the power+inputs to it, while the other 34 are LCD pins, except pin 21 which wasn't hooked up but I suspect might be another LCD pin.