INES Mapper 145
Nestopia, GoodNES, and Санчез all agree: iNES Mapper 145 is Yet Another CNROM clone. It’s a singleton, labeled SA-72007, and used by the Sachen game Sidewinder. It is very similar to iNES Mapper 087.
Mask: $E100
$4100: [C... ....] - select 8 KiB CHR bank.