What Is It?
A discrete logic Nintendo-made board.
Max 32K of PRG ROM
Max 32K CHR ROM
Note: this board has bus conflicts.
The LS161 acts as a latch. It latches D0 and D1. Writing anywhere in the 8000h-
FFFFh range will set this latch using the above data lines.
7 bit 0
The C bits select an 8K CHR ROM page.
Mirroring is hardwired on the cart.