What is a mapper?


roylazarovich

Still Fresh
Joined
Oct 14, 2003
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8
Hi.

While trying to load some ROM files on an emulator I received the message "Unsupported Mapper", I wanted to ask what exactly is a mapper since I've seen this term a lot in the emulation scene.

Thanks.
 
Basically, the mapper "maps" the locations of the various pieces of memory inside the ROM. NES cartridges do not all have the same mapper, so different cartridges need different mappers.
 
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