Change CNRom bank switching or new submapper

[Fixatron]

I have a game that I've made based on an extension of CNRom mapping. I've included an additional mapper chip to extend the CHRROM mapping bits to 6 (512kb), while the last two bits are used to swap 32k PRGROM banks to PRG_A15 and PRG_A16 (128kb). [bxCCCCCCPP]
Please make a submapper so the last two bits swap PRGROM for what I call "CNRom-Plus," which also has 2kb SRAM @$6000. Though, the extended CHRROM banks and RAM already work with using a CNROM mapper. I just need those last two bits to swap PRG banks

[Fixatron]

I've been trying to figure out how to test it for myself, but I'm not sure what I could change. I was trying to understand whats going on with the CNRom mapping in /src/boards/datalatch.cpp and add my own submapper, but I'm a bit stuck how it recognizes writes to $8xxx and swaps banks. Any help would be appreciated

[Fixatron]

I figured it out, thank you for the auto compiler