Originally Posted by byuu
Apparently not, because there is no distinction between reads and writes in my explanation. And thus, no distinction between ROM and RAM.

thanks a lot for the answer, really smile

this unfortunately makes harder to find our SuperFX problem, but at least it rules out mapping as the main reason. I'm going to review our SRAM code, eventually to check once more that writes are handled properly...

once again, byuu, you're help is invaluable!!