These types of freezers were on lots of systems. Everyone in the C64 scene will remember the ISEPIC, for example, which functioned in a like manner (I have an I

These types of freezers were on lots of systems. Everyone in the C64 scene will remember the ISEPIC, for example, which functioned in a like manner (I have an ISEPIC, but I used a Super Snapshot and/or a Final Cartridge III more often -- more reliable and loaded snapshots faster). Even back in the day these were recognized as lower-quality cracks, but sometimes the best you could do until the protection scheme was better understood. (ObDisclaimer: not an endorsement of piracy.)