Template:Octal D

In theory, it would be possible to implement the bank select register with a 74373/74374/74377/74573 octal D latch, allowing up to {{{1}}}, but due to mask ROM cost in the NES era, no non-pirate NES cart used this much memory.

About this template:

A lot of pages about 74HC161-based discrete logic mappers have similar wording.

Examples:

{{octal D|2 megabytes of PRG ROM}}

{{octal D|
512 KB of PRG ROM and 128 KB of PRG ROM|
whynot=but licensed games used an ASIC mapper instead for smaller banks}}