Max. 64K PRG ROM.
Max. 64K CHR ROM.
This is an unique Tengen board- it is only used on one cart that I know of. Tetris. Anyways,
there is not much to this one at all. It is essentially like CNROM with the ability to bank
the PRG ROM (though on Tetris it is only 32K). There ARE bus conflicts.
Writing anywhere in 8000-FFFFh will load the banking register:
7 bit 0
The C bits select an 8K CHR ROM page.
The P bit selects a 32K PRG ROM page.
Mirroring is pad-selectable.