LFA-15 (Logitec) C bus interface board for external 2DD FDD.Connector is an phenol 36-pin full pitch, requires dedicated cable (CB-98FD-001) to connect to FDD. When using the CPU of the PC body in V30 mode, the clock is 8 MHz or less (in PC-9800 PC-98 XL ^ 2 / RL, PC-9801 RX / RS / RA / DA / DS / ES / T / NS, and PC-386 series Confirm that PC-386 / S / V / VR / M / LS are officially supported), Set the built-in FDD to 1MB fixed mode.Not available in high res mode. The following expansion slots can be installed:  PC-9801E ・ ・ ・ ・ ・ ・ ・ ・ ・ # 1 to 5  PC-9801UV / CV21 ... # 1  PC-9801 M / VM ..... # 1 to # 3  PC-98 XA ..... # 2 There is one 8 series dip switch and one 3 jumper switch on the board. ・ 8 stations dip switch  Use with ON-OFF-ON-OFF-OFF-OFF-OFF-OFF-ON. ・ 3 jumper switch  PC-9801 / E / M and AB short (ROM operation on LFD-15 enabled)  Other models ■ Short between BC (ROM operation on LFD-15 is prohibited) When using the SASI HDD interface board, Short between BCs regardless. ※ This setting information is in the LFA-15 Instruction Manual, LFD-391F / 392F User's Manual.  Although based on the description, it is different from the switch setting information described in 98 JUNK. DOC  Yes.