Hi, I'm having some issues making my own ROM in GBZ80, and if anyone was to know the solution, it'd be someone here.
My cart type is 0x13, "MBC3+RAM+BATTERY"
I cannot write to any value between A000 and BFFF, and any read attempts return FF. I've tried toying with a few of the values at FF00+, but that's been proved fruitless. The area is titled SRA0 in BGB and I can't find anything about it online.
Any help would be much appreciated.