Well thanks for your help, that's why I wanted to use the TTL logic in the first place. There are countless of pirate mapper globtops with different functions. And you cannot believe that all pirated MMC3 carts use that "AX5202P" you've found in one of them. There even may be more "components" under that glob.
I went on this road many times and never got positive results. But it's fun to play in paintbrush
FARID wrote:Now you know that you need to tie VCC (pin28) to CE2 (pin26)
Yes, I'm aware of putting logic 1 on chip-enable, thanks. There's nothing special about it, it's active High.
But I don't think you should rely on original chip pinout, those chinese components covered with epoxy can have different pinouts, and the routes that are visible after exiting the glob can already be switched. AND you don't know if there are not any other "miracles" under the epoxy glob.
FARID wrote:Another issue is about size of PRG and CHR. They don't match your ROM size at all! I don't have any idea how this is possible on earth! Maybe those Chinese guys shared CHR between two Rockman version!
Are you taking into account that the 27C160 is 16-bit? If it's used in 8-bit mode, I don't see any "impossibility" in that...