Comment 1: Carl Industries (US importers) and Bung Enterprises presents the Professor SF2 (top left is US version) SNES backup unit. This is the US version of Hong Kong's number one selling unit, the Game Doctor SF 7. People love it because it's very reliable and has tons of great features. These units "piggyback" onto your SNES system, and allow you to back up your SNES cartridge games to floppy disks. You then need only the disks to play your games, through the unit's built in 3.5" disk drive. Its unique feature is that it is able to have multiple games loaded simultaneously into its memory, which stay there even with SNES power off! No need to load floppies over and over again! It also has an onscreen menu system which is controlled through the SNES controllers. The menu system features self testing (Memory, BRAM, ROM, and disk drive), file management, etc. It has many features including slow motion, real time save, Gold Finger cheat code system and superior error handling. It can transfer games from disks, computer, CDROM (optional), or memory. Other features include: 32 Mbit or 64 Mbit RAM, self test, menus in English, Chinese, or Japanese, 3 cheat modes, 256k BRAM, BRAM saves, BRAM copying to and from a cartridge, DSP support, and a PCX image slideshow function. Components are manufactured in ISO-9000 factories, to provide excellent quality. It boasts clean, integrated PCB design and multi-voltage power supply capability. To change from SF7 to Professor (and back again) toggle jumper 3 (S3) on the mainboard.