headerless rom hash: SHA1:FACEE9C577A5262DBE33AC4930BB0B58C8C037F7 headerless rom hash: MD5:8E3630186E35D477231BF8FD50E54CDD no-intro calls this rom `Super Mario Bros. (Japan, USA).nes` some old goodnes version calls it `Super Mario Bros. (JU) (PRG0) [!].nes` (note that PRG1 doesn't exist, maybe the reason they switched names later on)