HA-27 (ウィンテク) C bus SASI I / F. In 98JUNK.DOC, it is also described as "EZPCASH27-1SC" It is done.Two 8x dip switches and 2x4x on board There is one jumper switch. ・ 8 series dip switch SW1 specification of the first and second HDD capacity 1-2-3-4-5: Specify the capacity of the first HDD  ON-ON-ON-ON-ON 5MB (default setting)  ON-ON-ON-ON-OFF 10MB  ON-ON-OFF-ON-ON 20MB  ON-ON-OFF-OFF-ON 40MB 6-7-8: Specifying the capacity of the second HDD  OFF-OFF-OFF 2nd no connection (default setting)  ON-ON-ON 5MB  ON-ON-OFF 10MB  OFF-ON-ON 20MB  OFF-OFF-ON 40MB ・ 8 stations dip switch SW2: BIOS ROM address setting ・ Fixation       (Factory setting: OFF-OFF-OFF-ON-OFF-ON-OFF-OFF) ・ 2 × 4 jumper switch SW3: Setting of main unit type (BIOS ROM                 Address setting)  Short between 1-8 and 3-6, open between 2-7 and 4-5 ■ PC-9801M2  Short between 1-8 and 4-5, open between 2-7 and 3-6 ■ PC-9801E / F / F2 / U2 / VF / VM / VX  Short between 2-7 and 4-5, open between 1-8 and 3-6 ■ PC-9801, PC-98XA ※ Please use expansion slot # 4 with PC-98XA.