> I think 20MB is max without the FDHD kit.

That's what I was shooting for.

> Also you said you have a PMMU, you are sure its not a HMMU, right?

Yep. (I have both, but the PMMU is installed.)

> Its such a messes up machine when it comes to RAM.

Until I started playing with it again, I didn't realize how limiting the 8MB is. The processor is powerful enough to run a number of games I wanted to check out, but the memory is often a bottleneck.