1. Silentype printer interface card http://appleiifs.tripod.com/graphics/synchprinter.jpg 2. Integer BASIC Firmware Card. The 2716 jumper let you replace the 2516(?) ROMs with 2716 EPROMs. The red toggle switch lets you choose whether the motherboard or firmware card ROMs are active at power-up. http://apple2history.org/museum/peripheralcards_apple/firmware_card.ht ml 3. Xebec SASI hard drive controller for Sider brand hard drives. -- Paul R. Santa-Maria Temperance, Michigan USA