Current command:
hf mf eview --help
It displays emulator memory usage: hf mf eview [-hv] [--mini] [--1k] [--2k] [--4k] [--sk] options: -h, --help This help --mini MIFARE Classic Mini / S20 --1k MIFARE Classic 1k / S50 (def) --2k MIFARE Classic/Plus 2k --4k MIFARE Classic 4k / S70 -v, --verbose verbose output --sk Save extracted keys to file examples/notes: hf mf eview hf mf eview --4k