IF-55Tn (TEAC) SCSI interface for multi vendor non-compliant old 98 note 110 pin expansion bus. With 1MB FDD connector.There is a switch for main unit selection written N / NS on the back. The SCSI unit is fixed at ID = 7, the resource is fixed at INT = 0 (IRQ = 3), and DMA = 3. ROM address space = DC000H to DCFFFH I / O port address = CC0H, CC2H, CC4H Terminator power is supplied from HDD.