A couple of questions about the mapper 268

[FedorM84]

1. I cannot achieve correct auto-detection of the sizes of PRG and CHR for the mapper 268.
   According to nesdev.org :
   "NES 2.0 Mapper 268 denotes cartridges using the AA6023 ASICs, labeled SMD132/SMD133 when packaged, MMC3 clones that can address up to 32 MiB of PRG-ROM, 256 KiB of CHR-ROM or -RAM, and 8 KiB of WRAM. ..." I set the PRG and CHR manually.

The header looks like this: 4E45531A6400C008010F070C00000000.

2. As I understand it, today OSCR is not able to overwrite Mindkids cartridges on the 268 mapper (IC labled "SMD133")? There is a utility for generating custom ROMs from ClusterM.

It would be great to add support flashing these cartridges.