Early on most MSX emulators are (or were) based on the code of the pioneer fMSX, a portable MSX emulator by Marat Fayzullin, but many emulators removed Fayzullin's Z80 emulation code entirely in later versions to avoid legal problems as at the time fMSX wasn't free software.
Une grande partie des émulateurs MSX est basée sur le code du pionnier fMSX, un émulateur portable créé par le russe Marat Fayzullin.