how do you find out the mapper of a nes rom? i currently use cajones, but it is outdated and doesnt always give the correct one with famicom and pirate games. can you use virtuanes's memory viewer? thanks
The most accurate way is to use NEStopia and go to View -> Image info
VirtuaNES does display iNES data if you go to File->ROM Info, but is does just show numbers from the iNES header in an arranged way, it won't get the info from a huge database with all commercial games and their CRC like NEStopia does.
FCEU does too, when you go to Help / Message log.