Editing Memory management controller (Nintendo) (section)

===UNROM===
* Manufacturer: [[Nintendo]]
* Games: ''[[Pro Wrestling (NES video game)|Pro Wrestling]]'',<ref name="np"/>{{rp|29}} ''[[Ikari Warriors]]'', ''[[Mega Man (video game)|Mega Man]]'', ''[[Contra (video game)|Contra]]'', ''[[Castlevania (1986 video game)|Castlevania]]''

Early NES mappers are composed of [[7400 series]] discrete logic chips.<ref name="np"/>{{rp|29}} UNROM appeared in late 1986. It supports a single fixed 16KB PRG bank, the rest of the PRG being switchable.<ref name="nesdevwiki_unrom">{{Cite web|url=http://wiki.nesdev.com/w/index.php/UxROM|title=UxROM - Nesdev wiki|website=wiki.nesdev.com}}</ref> Instead of a dedicated ROM chip to hold graphics data (called CHR by Nintendo), games using UNROM store graphics data on the program ROM and copy it to a RAM on the cartridge at run time.<ref name="np"/>{{rp|29}}