The Super Control Station (スーパーコントロール・ステーション) SF-7000 is an add-on to the SC-3000 home computer, manufactured by Sega. It debuted in 1984 for the asking price of ¥79,800.
The SF-7000 allows the user to run software off 3-inch floppy disks, as well as adding a further 64kB of RAM, 8kB of ROM, a Centronics parallel port and an RS-232 serial port. It is an extremely rare and very expensive item, and because it relied on the 3-inch floppy disk standard rather than the far more common 3½-inch or 5¼-inch varieties, software is equally rare.
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